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Google unveils DiffusionGemma, an AI model that breaks free of left-to-right processing

Extremely powerful large language models (LLMs) still operate as though they’re typing on a keyboard, processing workloads in a simple left-to-right fashion. But in locally-run, single-user scenarios, this sequential processing can leave graphics processing units (GPUs) and tensor processing units (TPUs) underutilized.

Google is betting that DiffusionGemma can get around this bottleneck. The new experimental open model generates text “exceptionally fast,” creating entire blocks of text simultaneously through diffusion techniques rather than through token-by-token processing. The company says this technique results in 4x faster inference compared to auto-regressive models that rely on sequential processing.

It can also save users money. Technology analyst Carmi Levy noted that existing pay-per-token monetization models “penalize the use of less than optimally efficient AI solutions.”

But DiffusionGemma “could herald a new generation of task-defined, efficient solutions that can enable expanded compute capacity without draining the operations budget,” he said.

A contrast to left-to-right processing

Built on Google’s Gemma 4 family and its Gemini Diffusion research, DiffusionGemma is a 26B mixture-of-experts (MoE) model designed to maximize text output generation.

It essentially shifts how models use hardware, giving processors a larger hunk of work each cycle so it can draft full 256-token paragraphs in sequence. This allows the model to generate text up to 4x faster on GPUs, Google claims. It activates only 3.8B parameters during inference, and, when quantized, can fit within 18GB VRAM on high-end consumer GPUs like Nvidia RTX 5090.

“It upgrades your model inference from a single, sequential typewriter to a massive printing press that stamps the entire block of text simultaneously,” Google research scientists Brendan O’Donoghue and Sebastian Flennerhag wrote in a blog post.

AI image generators begin with pure, random ‘visual noise’ and iteratively refine that into a finalized picture (what’s known as ‘diffusion’); DiffusionGemma applies this same process to text. It does not generate tokens in order, but begins with a “canvas of random placeholder tokens” that it processes in multiple passes, identifying the context tokens it feels are most relevant and using those to refine the rest.

The model has the ability to self-correct, using confidence scoring to re-evaluate tokens in the next pass. “The model iteratively refines its own output, allowing it to evaluate the entire text block at once to fix mistakes in real-time,” O’Donoghue and Flennerhag explained.

DiffusionGemma also has bidirectional attention, they wrote. “Generating 256 tokens in parallel with each forward pass allows every token to attend to all others.” This can be particularly helpful in domains that are non-linear in nature, such as mathematical graphs, code infilling, and in-line editing, they said.

DiffusionGemma is optimized across Nvidia’s hardware stack, making it compatible with consumer setups as well as with high-performance enterprise systems like Hopper and Blackwell.

Because it is released under the Apache 2.0 license, developers can freely use, modify, distribute, and commercialize the software using their preferred tools. It can be run on GPUs or in the cloud through Google Cloud Model Garden or Nvidia NIM, and is available on Hugging Face, GitHub, and vLLM, with support for the open-source library llama.cpp coming soon.

Key use cases

The model is particularly useful in local workflows that are “speed critical,” such as generation of non-linear text structures, and unlocks what Google calls “new patterns of model behavior” like multimodal understanding and generating and rendering code in near real-time.

Levy explained, “DiffusionGemma is particularly well suited for interactive coding and editing where its efficiency allows rapid processing and iterations,” noting that its ability to fit within 18GB of VRAM and its deployability on commonly available local GPUs can potentially benefit customer service-related workloads that lean heavily on real-time interaction and local processing.

“DiffusionGemma also incorporates a thinking mode that is especially adept at problem solving,” he said. For instance, the model was fine-tuned to play Sudoku, a typically challenging task for autoregressive models because each token depends on future tokens. This “rather handily” illustrates the model’s capability to solve more complex problems, Levy noted.

Limitations

Google freely admits that DiffusionGemma is geared to specific workflows, and there are “key trade-offs.”

The model is engineered for small batch size inferencing and low-latency, high-speed generation low-to-medium batch sizes on a “single capable accelerator.”

In high-QPS cloud serving environments, (where infrastructure is designed to handle tens or hundreds of thousands of requests per second with ultra-low latency), DiffusionGemma’s parallel coding “offers diminishing returns,” and can even result in higher serving costs, Google conceded. In addition, its overall output quality is lower than that of standard Gemma 4, which is built for apps demanding maximum quality.

However, Levy noted that while DiffusionGemma “can be less precise than other models in certain workloads,” subsequent refinement cycles could overcome this limitation.

While Google isn’t sharing runtime costs, it’s clear that this is an efficiency play, he added. “When deployed across the kinds of workloads that would optimally benefit from its architecture, DiffusionGemma seems to have the potential to reduce processing overhead and related costs,” he said.

This article originally appeared on InfoWorld.

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Google unveils DiffusionGemma, an AI model that breaks free of left-to-right processing

Extremely powerful large language models (LLMs) still operate as though they’re typing on a keyboard, processing workloads in a simple left-to-right fashion. But in locally-run, single-user scenarios, this sequential processing can leave graphics processing units (GPUs) and tensor processing units (TPUs) underutilized.

Google is betting that DiffusionGemma can get around this bottleneck. The new experimental open model generates text “exceptionally fast,” creating entire blocks of text simultaneously through diffusion techniques rather than through token-by-token processing. The company says this technique results in 4x faster inference compared to auto-regressive models that rely on sequential processing.

It can also save users money. Technology analyst Carmi Levy noted that existing pay-per-token monetization models “penalize the use of less than optimally efficient AI solutions.”

But DiffusionGemma “could herald a new generation of task-defined, efficient solutions that can enable expanded compute capacity without draining the operations budget,” he said.

A contrast to left-to-right processing

Built on Google’s Gemma 4 family and its Gemini Diffusion research, DiffusionGemma is a 26B mixture-of-experts (MoE) model designed to maximize text output generation.

It essentially shifts how models use hardware, giving processors a larger hunk of work each cycle so it can draft full 256-token paragraphs in sequence. This allows the model to generate text up to 4x faster on GPUs, Google claims. It activates only 3.8B parameters during inference, and, when quantized, can fit within 18GB VRAM on high-end consumer GPUs like Nvidia RTX 5090.

“It upgrades your model inference from a single, sequential typewriter to a massive printing press that stamps the entire block of text simultaneously,” Google research scientists Brendan O’Donoghue and Sebastian Flennerhag wrote in a blog post.

AI image generators begin with pure, random ‘visual noise’ and iteratively refine that into a finalized picture (what’s known as ‘diffusion’); DiffusionGemma applies this same process to text. It does not generate tokens in order, but begins with a “canvas of random placeholder tokens” that it processes in multiple passes, identifying the context tokens it feels are most relevant and using those to refine the rest.

The model has the ability to self-correct, using confidence scoring to re-evaluate tokens in the next pass. “The model iteratively refines its own output, allowing it to evaluate the entire text block at once to fix mistakes in real-time,” O’Donoghue and Flennerhag explained.

DiffusionGemma also has bidirectional attention, they wrote. “Generating 256 tokens in parallel with each forward pass allows every token to attend to all others.” This can be particularly helpful in domains that are non-linear in nature, such as mathematical graphs, code infilling, and in-line editing, they said.

DiffusionGemma is optimized across Nvidia’s hardware stack, making it compatible with consumer setups as well as with high-performance enterprise systems like Hopper and Blackwell.

Because it is released under the Apache 2.0 license, developers can freely use, modify, distribute, and commercialize the software using their preferred tools. It can be run on GPUs or in the cloud through Google Cloud Model Garden or Nvidia NIM, and is available on Hugging Face, GitHub, and vLLM, with support for the open-source library llama.cpp coming soon.

Key use cases

The model is particularly useful in local workflows that are “speed critical,” such as generation of non-linear text structures, and unlocks what Google calls “new patterns of model behavior” like multimodal understanding and generating and rendering code in near real-time.

Levy explained, “DiffusionGemma is particularly well suited for interactive coding and editing where its efficiency allows rapid processing and iterations,” noting that its ability to fit within 18GB of VRAM and its deployability on commonly available local GPUs can potentially benefit customer service-related workloads that lean heavily on real-time interaction and local processing.

“DiffusionGemma also incorporates a thinking mode that is especially adept at problem solving,” he said. For instance, the model was fine-tuned to play Sudoku, a typically challenging task for autoregressive models because each token depends on future tokens. This “rather handily” illustrates the model’s capability to solve more complex problems, Levy noted.

Limitations

Google freely admits that DiffusionGemma is geared to specific workflows, and there are “key trade-offs.”

The model is engineered for small batch size inferencing and low-latency, high-speed generation low-to-medium batch sizes on a “single capable accelerator.”

In high-QPS cloud serving environments, (where infrastructure is designed to handle tens or hundreds of thousands of requests per second with ultra-low latency), DiffusionGemma’s parallel coding “offers diminishing returns,” and can even result in higher serving costs, Google conceded. In addition, its overall output quality is lower than that of standard Gemma 4, which is built for apps demanding maximum quality.

However, Levy noted that while DiffusionGemma “can be less precise than other models in certain workloads,” subsequent refinement cycles could overcome this limitation.

While Google isn’t sharing runtime costs, it’s clear that this is an efficiency play, he added. “When deployed across the kinds of workloads that would optimally benefit from its architecture, DiffusionGemma seems to have the potential to reduce processing overhead and related costs,” he said.

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OpenAI buys Ona to help rein in AI agents

CIOs and CISOs have many strategic and operational fears when it comes to unleashing fully-autonomous agents on tasks and hoping that everything works out. Will the agent start to delete critical files? Will the agent go off on a mission tangent and generate a massive token bill for the team when they return the next morning? Will it be tricked by a state actor and engage in malicious actions?

To help alleviate those concerns, OpenAI announced on Thursday that it has agreed to acquire Ona, a 79 person cloud development environment (CDE) provider formerly known as Gitpod, to accelerate its efforts to make agentic AI enterprise-friendly. 

An OpenAI statement said Ona’s technology “provides secure, persistent environments where agents can access the tools, systems, and context they need to make progress over time. By bringing Ona to OpenAI, we will expand Codex beyond work tied to a single device or active session and help more organizations deploy agents securely in production.”

An Ona statement attributed to CEO Johannes Landgraf shared similar sentiments.

“Ona brings the building blocks agents need for enterprise work: trusted, customer-controlled cloud environments where work continues across devices, inside the systems where software actually lives,” Landgraf said. “OpenAI brings frontier intelligence, product polish, and a scale of research and distribution we could never reach alone.”

Landgraf’s statement did not provide any annual revenue numbers, but did hint, without naming, at some large customers. “Since the beginning of the year, weekly Ona agent sessions have grown 13x in production across some of the world’s most demanding institutions: the oldest bank in the US, one of Europe’s largest pharma companies, one of Asia’s largest sovereign wealth funds and many others,” he wrote. “The largest enterprises out there love the platform and are expanding more rapidly than ever before.”

Arnal Dayaratna, research VP for software development at IDC, said IDC’s figures for Ona put its annual revenue for 2025 at “roughly $7 million.” He speculated that Ona’s revenue for 2026 would be higher: “Let’s say it’s $15 million. I am being generous. Maybe it’s really $10 million or $12 million.”

Dayaratna said if he uses a standard acquisition price of roughly a multiple of 30 times revenue, then depending on the actual 2026 figure, “that comes to $450 million or $500 million or so.”

But IDC sees this being a potentially good move for OpenAI, regardless of the specific acquisition price, given that OpenAI had the classic “buy or build” challenge. 

OpenAI has a substantial Codex effort, Dayaratna said, but what they lack is a safe area to protect enterprise autonomous agent efforts. “This is outside of what OpenAI has now. These are secure environments where agents can have memory and operate securely,” he said. “This is the kind of technology that one would expect to be needed, but I don’t know how good it is, to be honest.”

Gartner’s First Take, published today, noted that the acquisition will bring Codex “the essential scaling capability it lacked,” but also pointed out it forces some difficult decisions on enterprises: “Software engineering leaders must weigh the benefits of a vendor-specific integrated stack against the flexibility of staying vendor-agnostic.”

In addition, Gartner wrote, “This acquisition appears to be OpenAI’s response to Anthropic supporting self-hosted sandboxes in Claude Managed Agents, starting May 2026.”

Tom Findling, CEO of Conifers.ai, said he also sees OpenAI’s fear of Anthropic playing a meaningful role in this deal. 

“It feels like a move to keep pressure on Anthropic, especially as Claude Code gains traction with developers and enterprise buyers,” he said. “So I’d read this less as OpenAI taking out a small competitor and more as OpenAI trying to make sure Codex is enterprise-ready before Anthropic gets too far ahead. In the enterprise market, the battle is not just who has the smartest coding model, but who can make AI agents safe and useful enough for big companies to actually deploy.”

He added, “I don’t think this means OpenAI suddenly needs help making Codex better at writing code. The bigger issue is making Codex work inside real enterprise environments, where security, access controls, persistent cloud workspaces, audit trails, and integration with existing developer workflows matter just as much as the model itself. Ona gives OpenAI some of that missing plumbing.”

Jason Andersen, principal analyst for Moor Insights & Strategy, echoed the concerns about Anthropic.

“To be honest, I think it reinforces what I think, which is that OpenAI and Codex have given a lot of ground to Anthropic and Claude Code, who are winning right now,” he said. “But again, this is not about the market today, I think it’s about how OpenAI will need to position itself as more than just a model as we see the incumbent players, particularly Microsoft, bolster their enterprise coding infrastructure story.”

Andersen said that Moor doesn’t have any strong basis for a guess on the financials, but added, “I am going to assume it was a fairly high multiple, but on a small base. I would not speculate on an amount, but given the enterprise customers that Ona did have, it may be more than we think.”

He also reinforced the idea that OpenAI is going to need help to achieve its own objectives.

“We continue to see that AI adoption is strongest in coding, and other use cases are not as far along,” he said. “So, if you are a general-purpose AI company like OpenAI, you need to double down on development use cases. The meaningful investment and spending on development is happening at the enterprise level, and those customers have more demands for governance, security, etc. than Codex or Claude code can handle.”

That said, he noted, “what you’re seeing is traditional software and cloud plays building out the coding and ops infrastructure around the popular models. That increased competition, while good for selling tokens, is still keeping OpenAI and Anthropic on the outside looking in. So, OpenAI and Anthropic need a stronger enterprise dev story, or they are just another model that could be easily replaced.”

Jeremy Roberts, senior director at Info-Tech Research Group, said that he also sees this as likely a good move for OpenAI.

“OpenAI is growing up a little bit,” and they may be falling behind Anthropic, Roberts said. “I see Ona as a boring company, but not in a bad way. They are not flashy, but absolutely necessary.”

Ona is delivering a workspace for Codex that an enterprise can run in its own virtual private cloud, with governance and persistence and an environment where the company can apply their own controls including log management, credential management and resource access, he said. “It is a bucket for the agents to operate in” where IT can “make sure that access is properly credentialed and is controlled effectively to prevent the model doing what it shouldn’t be doing,” which includes managing read/write protections.

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Claude Corps: Charitable work or charity washing?

Anthropic has come up with a neat way to combat those students who are booing AI at their universities.

The company has launched Claude Corps, an endeavor that will pay selected young people to extol the benefits of AI to communities across the US.

Anthropic is looking to recruit 1000 “fellows” and introduce them to selected nonprofits. The vision is that both sides benefit: the nonprofits learn how to use AI tools effectively and the young evangelists develop their own knowledge of AI. The company is committing to spend $150m on the project.

It will work with two partners: CodePath will act as the fellows’ official employer, while investment advisor Social Finance will lead measurement and evaluation.

The fellows will certainly be well rewarded: the companies are paying $85,000 for their yearly commitment, on top of their extensive training. At least 400 nonprofits will be hosting the initial wave of AI enthusiasts.

Of course, it’s easy to be cynical about such a venture given the increasing backlash against AI from students. But perhaps Anthropic has genuinely seen an opportunity to improve AI knowledge and equip a new generation with another set of skills. Time will surely tell.

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Software engineer reportedly wins religious exemption from AI use

When Pope Leo XIV wrote about the effect that AI is having on our world in his encyclical, Magnifica Humanitas, he may not have imagined the document being referenced in an HR environment.

But, according to a report by Business Insider, Erin Maus, a software developer in North Carolina, used the Pope’s message about the need for vigilance in how AI would be deployed to gain a special exemption from her employer about using the technology for coding.

Maus is not even a Catholic but a Unitarian Universalist, according to the report. However, it said, she maintained that the use of AI didn’t align with her religious beliefs.

Business Insider said that to make her case, she consulted an employment lawyer — a move to be expected — and her local chapter’s minister — which probably wasn’t. Her wishes were reportedly granted last month. “I’m writing my code and reviewing my code by hand, which seems crazy to say,” she told the publication.

She’s certainly not alone in wondering whether AI is always the way forward for techies: a journalist at PC World has also been rethinking its use after reading the encyclical.

It remains to be seen whether this will be the spur for a torrent of claims from Catholic workers, asking to be freed from the demands of using AI or whether Business Insider’s report is an outlier.

This article first appeared on InfoWorld.

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Software engineer reportedly wins religious exemption from AI use

When Pope Leo XIV wrote about the effect that AI is having on our world in his encyclical, Magnifica Humanitas, he may not have imagined the document being referenced in an HR environment.

But, according to a report by Business Insider, Erin Maus, a software developer in North Carolina, used the Pope’s message about the need for vigilance in how AI would be deployed to gain a special exemption from her employer about using the technology for coding.

Maus is not even a Catholic but a Unitarian Universalist, according to the report. However, it said, she maintained that the use of AI didn’t align with her religious beliefs.

Business Insider said that to make her case, she consulted an employment lawyer — a move to be expected — and her local chapter’s minister — which probably wasn’t. Her wishes were reportedly granted last month. “I’m writing my code and reviewing my code by hand, which seems crazy to say,” she told the publication.

She’s certainly not alone in wondering whether AI is always the way forward for techies: a journalist at PC World has also been rethinking its use after reading the encyclical.

It remains to be seen whether this will be the spur for a torrent of claims from Catholic workers, asking to be freed from the demands of using AI or whether Business Insider’s report is an outlier.

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Microsoft president responds to students’ distrust for AI

Microsoft’s president, Brad Smith, has reacted to student discontent with AI, telling today’s graduates that there is still a place for human creativity.

Students across the US have booed speakers who talked up AI at their graduation ceremonies in recent months, including Google’s former CEO Eric Schmidt, the CEO of a record label, and a real estate executive.

Smith hasn’t ventured out onto a podium to share his views, but in a lengthy blog post, AI, Jobs and the Next Generation, acknowledged students’ concerns about their futures.

He said that, just as painting survived the arrival of photography, so will the job market survive the arrival of AI. “While it may feel unfair that the job market is so uncertain, you were made for this moment. Technology is second nature to your generation. Constant change has taught you how to adapt quickly,” he wrote.

He also used the blog to promote a book written by his colleagues Ryan Roslansky and Aneesh Raman on how to get ahead at work in the age of AI.

The corporate world will see massive changes, he said: “This includes AI automation of tasks in current entry-level positions and, especially in the tech sector, corporate pressure to reduce headcount to help pay for AI’s enormous capital expenditures.”

Some of those changes are already here. In the past six months, we have seen massive job losses at Oracle, at Meta and at AWS. There are no signs of any let-up: Last month saw the tech industry shed more than 38,000 jobs. Students contemplating their future will find little comfort in Smith’s optimistic words, particularly as his essay shows that Microsoft is not making any changes to its AI program going forward.

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A ‘Memory Switchboard’ in the Hippocampus May Help Explain How the Brain Learns Without Overwriting Old Memories


Scientists have often wondered how the brain can take in new experiences without erasing stored memories. However, a new study in Nature now identifies a circuit-level mechanism that may help answer this question—and it may also offer clues for improving artificial intelligence.

Researchers at NYU Langone Health recorded the activity of hundreds of neurons simultaneously across several brain regions in mice. By tracking how signals move from the hippocampus to the neocortex, where long-term memories are kept, they found that a subset of hippocampal neurons appears to participate in routing information between regions in distinct patterns. These cells participate in both incoming and outgoing signaling, but do so using distinct patterns of activity.

Separate Channels Through the Same Cells

The study focused on a series of interconnected brain regions: CA3, which processes rapidly changing information; CA1, which serves as a central hub; and the retrosplenial cortex, which is important for navigation and spatial memory. About one in four CA1 neurons receives most of the signals from CA3. When these same neurons send signals to the retrosplenial cortex, they fire in a different pattern, creating a separate outgoing channel using the same cells.

Rather than using new neurons, the brain separates these channels by changing how the same neurons fire together. The researchers suggest this arrangement may help reduce interference between new learning and more stable cortical memories.

“Our findings help explain how memory can be both moldable and enduring,” said co-lead author Joaquín Gonzalez, PhD, a postdoctoral fellow in the Department of Psychiatry at NYU Grossman School of Medicine. “By changing how the same cells fire together instead of turning on new cells, the brain can keep information organized and protect older memories.”

What Happens During Sleep

The CA1 neurons involved in learning during the day also stay active at night. The researchers found that these cells remain busy during sleep events called sharp-wave ripples, which are bursts of activity the hippocampus uses to replay and strengthen memories from the day.

Since overlapping neurons are recruited during both waking activity and sleep replay, the same circuit elements appear to participate in both learning and consolidation. This theoretically allows the brain to use a single system for both learning and storing memories, without the two processes interfering with each other.

“Our study shows how learning and memory consolidation can coexist in the same network,” said co-lead author Mihály Vöröslakos, MD, PhD. “Our discovery was made possible because for the first time, we were able to record hundreds of individual neurons across all the key regions simultaneously in animals that were moving around naturally.”

Implications for Disease and AI

The system identified in this research may help explain how memory disorders begin. In Alzheimer’s disease, for example, the hippocampal circuits examined here are some of the earliest to deteriorate. These networks are essential for sorting and organizing new experiences.

“Our discovery of a ‘memory switchboard’ deep in the hippocampus may provide clues as to how memory circuits fail in Alzheimer’s disease,” said co-senior author Zhe S. Chen, PhD, a professor in the Departments of Psychiatry and Neuroscience at NYU Grossman School of Medicine.

Artificial intelligence systems have a hard time holding onto what they’ve already learned when faced with new tasks, a problem researchers call catastrophic forgetting. The human brain appears able to update memories without catastrophic forgetting by altering the use of existing neural circuits. By studying how our brains pull this off, scientists hope to design AI that can keep learning new things without forgetting the old.

“By showing how the mammalian brain can safeguard memories during learning, our research may offer a biological blueprint for designing next-generation AI technology that can update itself continuously without overwriting what it has already acquired,” said co-senior author György Buzsáki, MD, PhD, the Biggs Professor of Neuroscience at NYU Grossman School of Medicine.

The researchers plan to investigate whether similar switchboard-like channels exist in other memory circuits. The authors caution that their findings in mice under controlled conditions do not yet allow conclusions about the human brain.

Austin Burgess is a writer and researcher with a background in sales, marketing, and data analytics. He holds an MBA, a Bachelor of Science in Business Administration, and a data analytics certification. His work focuses on breaking scientific developments, with an emphasis on emerging biology, cognitive neuroscience, and archaeological discoveries.

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