Thinking Machines Lab, the San Francisco startup founded by former OpenAI CTO Mira Murati, has released Inkling, its first general-purpose AI model. The launch adds another US-developed entrant to an open-weight market where Chinese developers produce several leading coding and reasoning models.

Inkling uses a mixture-of-experts architecture with 975 billion total parameters, of which 41 billion are active during processing. It supports a context window of up to 1 million tokens and was pretrained on 45 trillion tokens spanning text, images, audio, and video. Thinking Machines said it also trained the model for coding, tool use, and multimodal tasks.

The release follows the October 2025 launch of Tinker, Thinking Machines’ first product and an API-based platform for customizing AI models. Developers can fine-tune Inkling through the platform.

In a June 2026 assessment, AI model routing platform OpenRouter highlighted DeepSeek V4 Flash, GLM 5.2, MiniMax M3, and Nvidia Nemotron 3 Ultra as four notable open-weight models. Nemotron was the only US-developed model in the group.

Performance and developer access

Thinking Machines Lab’s benchmark table shows mixed results. Inkling scored 77.6% on SWE-Bench Verified, behind DeepSeek V4 Pro and GLM 5.2 but ahead of Nvidia Nemotron 3 Ultra. It also recorded 74.1% on MCP Atlas, 77.1% on BrowseComp with context management, and 79.8% on IFBench.

Thinking Machines said Inkling’s result used a bash-only harness, while the comparison figures were reported by the competing models’ developers.

The model includes a reasoning-effort setting that developers can adjust from 0.2 to 0.99. Thinking Machines said the setting allows users to balance performance against the number of generated tokens. In the company’s testing, Inkling matched Nemotron 3 Ultra’s Terminal Bench 2.1 score while generating about one-third as many tokens.

Developers can fine-tune Inkling through Tinker using context lengths of 64,000 or 256,000 tokens and test it through the Inkling Playground. The model is available through APIs from Together AI, Fireworks, Modal, Databricks, and Baseten. It is also supported by inference software, including SGLang, vLLM, TokenSpeed, llama.cpp, and Hugging Face Transformers.

Inkling’s full weights are available on Hugging Face as the original checkpoint and as a quantized NVFP4 checkpoint. Thinking Machines also previewed Inkling-Small, which has 276 billion total parameters and 12 billion active parameters. The company said it would release the smaller model’s full weights after completing testing.

Enterprise impact

Inkling’s differentiation lies in its open weights, multimodal capabilities, controllable reasoning, and integration with Tinker, rather than benchmark leadership, according to Biswajeet Mahapatra, principal analyst at Forrester.

“Enterprises are most likely to benefit in workloads where domain adaptation matters more than generic model performance, including knowledge-intensive copilots, multimodal customer service, document understanding, operational workflow automation, and agentic tasks that require organization-specific data, policies, and processes,” Mahapatra said.  

Inkling’s US origin could also influence adoption among Western enterprises, according to Pareekh Jain, CEO of Pareekh Consulting. He said many Western organizations face regulatory or procurement barriers when considering Chinese-developed AI models.

“Inkling gives those organizations a US-developed open-weight option that they can deploy on their own infrastructure,” Jain said.

However, the benefits will need to be weighed against the cost of deploying the full model.

Running Inkling on private infrastructure requires a GPU cluster with at least 2 TB of aggregated VRAM for the BF16 checkpoint, according to the model card. Thinking Machines lists configurations of eight Nvidia B300 GPUs or 16 H200 GPUs. A quantized NVFP4 checkpoint lowers the requirement to at least 600 GB and can run on four B300 GPUs or eight H200 GPUs.

“Because Inkling is a massive model with 975 billion total parameters, running the full model still requires significant GPU infrastructure, making closed-model APIs more economical for many organizations,” Jain said.

Jain said Inkling-Small may be a more feasible option for many enterprises because it could reduce infrastructure costs and latency while retaining useful performance across key workloads.

Safety and governance

Thinking Machines said it trained Inkling for calibration, instruction following, and resistance to censorship. The company said the model showed “strong patterns of censorship non-compliance” when evaluated by Cognition on its Propaganda and Censorship Eval.

Inkling scored 98.6% on StrongREJECT, which Thinking Machines described as a test of whether models refuse unambiguous harmful requests.

The model’s safety behavior should be retested after an enterprise customizes it, according to Jain. “Model fine-tuning can weaken safety filters, so companies should retest safety after customizing the model rather than assuming it stays safe,” Jain said.

He added that self-hosted and modified versions could diverge from Thinking Machines’ official model over time without receiving automatic updates.

“CIOs need to ensure every AI agent action is logged, auditable, and governed by human approval for high-risk tasks,” Jain said.

The article originally appeared on InfoWorld.

Thinking Machines Lab, the San Francisco startup founded by former OpenAI CTO Mira Murati, has released Inkling, its first general-purpose AI model. The launch adds another US-developed entrant to an open-weight market where Chinese developers produce several leading coding and reasoning models.

Inkling uses a mixture-of-experts architecture with 975 billion total parameters, of which 41 billion are active during processing. It supports a context window of up to 1 million tokens and was pretrained on 45 trillion tokens spanning text, images, audio, and video. Thinking Machines said it also trained the model for coding, tool use, and multimodal tasks.

The release follows the October 2025 launch of Tinker, Thinking Machines’ first product and an API-based platform for customizing AI models. Developers can fine-tune Inkling through the platform.

In a June 2026 assessment, AI model routing platform OpenRouter highlighted DeepSeek V4 Flash, GLM 5.2, MiniMax M3, and Nvidia Nemotron 3 Ultra as four notable open-weight models. Nemotron was the only US-developed model in the group.

Performance and developer access

Thinking Machines Lab’s benchmark table shows mixed results. Inkling scored 77.6% on SWE-Bench Verified, behind DeepSeek V4 Pro and GLM 5.2 but ahead of Nvidia Nemotron 3 Ultra. It also recorded 74.1% on MCP Atlas, 77.1% on BrowseComp with context management, and 79.8% on IFBench.

Thinking Machines said Inkling’s result used a bash-only harness, while the comparison figures were reported by the competing models’ developers.

The model includes a reasoning-effort setting that developers can adjust from 0.2 to 0.99. Thinking Machines said the setting allows users to balance performance against the number of generated tokens. In the company’s testing, Inkling matched Nemotron 3 Ultra’s Terminal Bench 2.1 score while generating about one-third as many tokens.

Developers can fine-tune Inkling through Tinker using context lengths of 64,000 or 256,000 tokens and test it through the Inkling Playground. The model is available through APIs from Together AI, Fireworks, Modal, Databricks, and Baseten. It is also supported by inference software, including SGLang, vLLM, TokenSpeed, llama.cpp, and Hugging Face Transformers.

Inkling’s full weights are available on Hugging Face as the original checkpoint and as a quantized NVFP4 checkpoint. Thinking Machines also previewed Inkling-Small, which has 276 billion total parameters and 12 billion active parameters. The company said it would release the smaller model’s full weights after completing testing.

Enterprise impact

Inkling’s differentiation lies in its open weights, multimodal capabilities, controllable reasoning, and integration with Tinker, rather than benchmark leadership, according to Biswajeet Mahapatra, principal analyst at Forrester.

“Enterprises are most likely to benefit in workloads where domain adaptation matters more than generic model performance, including knowledge-intensive copilots, multimodal customer service, document understanding, operational workflow automation, and agentic tasks that require organization-specific data, policies, and processes,” Mahapatra said.  

Inkling’s US origin could also influence adoption among Western enterprises, according to Pareekh Jain, CEO of Pareekh Consulting. He said many Western organizations face regulatory or procurement barriers when considering Chinese-developed AI models.

“Inkling gives those organizations a US-developed open-weight option that they can deploy on their own infrastructure,” Jain said.

However, the benefits will need to be weighed against the cost of deploying the full model.

Running Inkling on private infrastructure requires a GPU cluster with at least 2 TB of aggregated VRAM for the BF16 checkpoint, according to the model card. Thinking Machines lists configurations of eight Nvidia B300 GPUs or 16 H200 GPUs. A quantized NVFP4 checkpoint lowers the requirement to at least 600 GB and can run on four B300 GPUs or eight H200 GPUs.

“Because Inkling is a massive model with 975 billion total parameters, running the full model still requires significant GPU infrastructure, making closed-model APIs more economical for many organizations,” Jain said.

Jain said Inkling-Small may be a more feasible option for many enterprises because it could reduce infrastructure costs and latency while retaining useful performance across key workloads.

Safety and governance

Thinking Machines said it trained Inkling for calibration, instruction following, and resistance to censorship. The company said the model showed “strong patterns of censorship non-compliance” when evaluated by Cognition on its Propaganda and Censorship Eval.

Inkling scored 98.6% on StrongREJECT, which Thinking Machines described as a test of whether models refuse unambiguous harmful requests.

The model’s safety behavior should be retested after an enterprise customizes it, according to Jain. “Model fine-tuning can weaken safety filters, so companies should retest safety after customizing the model rather than assuming it stays safe,” Jain said.

He added that self-hosted and modified versions could diverge from Thinking Machines’ official model over time without receiving automatic updates.

“CIOs need to ensure every AI agent action is logged, auditable, and governed by human approval for high-risk tasks,” Jain said.

It’s not so much generosity that’s behind Anthropic’s decision to extend free access to its most advanced model, Fable, for paid subscribers until July 19, analysts say. Its a last-minute move to grab users, data and model evaluation results.

After the free-access period, Anthropic plans to convert Fable to a pay-per-use model, at $10 per million input tokens and a whopping $50 for 1 million output tokens.

That is double the price of its next most advanced model, Opus 4.8, for input and output tokens. “We’re extending Claude Fable 5 access on all paid plans, as well as keeping Claude Code’s weekly rate limits 50% higher, through July 19,” Anthropic’s team said in a July 12 tweet.

Anthropic keeps extending Fable because it does not yet know what its flagship is worth, said Sanchit Vir Gogia, principal analyst at Greyhound Research. “A vendor confident in its price does not move the same cutoff twice in six days, both times at the wire,” Gogia said.

Anthropic is essentially pushing deadlines to test its products, while users gain by being able to put their toughest tasks to Fable, Gogia said.

Anthropic, which did not immediately reply to a request for comment about the situation, has already seen plenty of action with Fable and its sister model Mythos. Both have been touted as the company’s most advanced models yet.

Fable stumbles, then reappears

Fable was officially launched June 9. Just three days later, on June 12, the US government put export controls on it after Amazon researchers bypassed Fable’s safeguards, prompting the model to identify software vulnerabilities and demonstrate an exploit. 

After Anthropic scrambled to address the issues — and after the export controls were lifted — Fable was relaunched July 1.

Fable’s freebie extension comes after OpenAI’s latest model, ChatGPT 5.6 Sol, became generally available July 9. Sol is cheaper at $5 per one million tokens input, and $30 for 1 million output tokens.

Anthropic and OpenAI are competing aggressively to build market share, said Jack Gold, principal analyst at J. Gold Associates. “Anthropic and OpenAI are looking to go public and the more users they have, the more attractive it is — even if they are not yet producing income,” he said.

In some ways, the two companies are following a well-trodden path to get customers hooked on their products and turned into paying customers. That’s what Meta, Google and Microsoft, for instance, have done over the years with various “free” offers that later morphed into paid products. 

Plus, said Gold, ”The more users you have, the better you can train your models across multiple data sets.”

That’s a potential boon for proprietary large language model (LLM) vendors offering free tokens in a bid to lock enterprises and vendors into their AI environments. But numerous experts have warned enterprises not to fall for that tactic. Instead, they argue enterprises should diversify AI development across multiple AI and cloud vendors, and adopt open-source models.

An LLM space race?

According to LLM benchmarks maintained by Artificial Analysis, Fable is the most intelligent model currently available, with Sol just behind it in second place. One benchmark by LiveBench places Sol as being better in reasoning, with Fable better at math, data analysis, instruction following and language. Both models have advantages in coding.

Meanwhile, Cursor and SpaceXAI on July 8 unveiled Grok 4.5, which the companies said can “handle difficult, long-running tasks that require creatively using tools to solve problems, whether in software engineering, data science, finance, legal work, or anything else you do on a computer,” the company said in a blog entry.

Its pricing is even more aggressive than Fable and ChatGPT 5.6 Sol. Grok 4.5 charges $2 for 1 million input tokens and $6 for 1 million output tokens.

There are growing concerns about tokenmaxxing, where enterprises rack up billions of dollars in token spending, blowing past usage limits before finance controls are implemented.

Enterprises might decide to spend more on models such as Mythos and Fable — if the benefits are tangible, said Max Leaming, head of data science and AI solutions at ManpowerGroup. Fable and Mythos may “actually be less expensive to use in spite of the spiked token cost because it’s far more efficient,” he said.

A company might find that the models use fewer tokens, are faster, and can reduce compute time, he said. “Even though the per-token costs may go up, we may see overall costs go down,” Leaming said.

A year ago, most enterprise AI systems generated recommendations. Today, AI systems are approving transactions, routing shipments, updating records, interacting with customers, and triggering downstream software actions with little or no human involvement.

For CIOs, that shift changes the central governance question. The challenge is no longer simply whether an AI model is accurate. It is whether the organization can explain, audit, and defend the decisions the system makes.

When an AI assistant suggests a meeting time or summarizes a document, mistakes are inconvenient. When an autonomous AI system issues a refund, reprices a product, modifies a customer record, or initiates a financial transaction, mistakes carry operational, legal, and reputational consequences.

When those consequences arrive, “the model decided” is not an acceptable explanation.

This is the accountability gap emerging at the center of enterprise AI adoption. Organizations are deploying increasingly autonomous systems while relying on technology that often provides little visibility into how decisions are made. The result is a growing mismatch between the level of authority organizations grant AI and their ability to understand or justify its actions.

Black-box AI may have been acceptable when AI primarily generated predictions. It becomes far more problematic when AI begins taking actions on behalf of the business.

The lesson software already learned

Fortunately, the technology industry has faced a similar challenge before.

As enterprise software systems became more distributed and complex, troubleshooting failures became increasingly difficult. Engineers could no longer rely on intuition to understand what happened when something broke. The solution was observability: the practice of instrumenting systems so their internal state could be understood through logs, metrics, traces, and monitoring.

The goal was not to predict every possible failure in advance. It was to create enough visibility that teams could reconstruct what happened after the fact and identify the root cause.

Enterprise AI now requires a similar discipline.

But AI observability must go beyond traditional software observability. It is not enough to know what action occurred. Organizations also need visibility into why the system believed that action was appropriate.

An auditable AI system should be able to answer questions such as:

• What information did the system rely on?
• Which tools or data sources did it access?
• What alternatives did it consider?
• What verification steps were performed?
• How confident was it in its conclusion?
• What events led to the final action?

These questions are rapidly becoming essential operational requirements rather than technical nice-to-haves.

Why visibility matters more as AI gains autonomy

As AI systems become more autonomous, failures become harder to detect and diagnose.

A human reviewing a single AI-generated recommendation can often spot obvious mistakes. A network of AI agents coordinating multiple tasks across business processes presents a different challenge. Decisions can build upon one another. A flawed assumption early in a workflow can propagate through subsequent actions, creating confident but incorrect outcomes.

The challenge is rarely identifying that something went wrong. Eventually, an error surfaces through a customer complaint, a failed transaction, an audit finding, or an operational disruption.

The challenge is determining why it happened.

Which information influenced the decision? Which tools were consulted? Which safeguards worked as intended? Which ones failed?

Without visibility into the reasoning process, troubleshooting autonomous AI workflows can become significantly more difficult than debugging traditional software systems.

For CIOs responsible for enterprise reliability, compliance, and governance, that lack of visibility creates unacceptable operational risk.

Moving toward glass-box AI

The answer is not to slow AI adoption. The answer is to make AI systems observable.

Increasingly, organizations are seeking AI systems that behave more like a glass box than a black box. The objective is not to expose every parameter inside a neural network. Rather, it is to provide a clear, auditable record of how decisions were reached and why actions were taken.

The most promising approaches share two common characteristics.

The first is verification. Instead of treating a single model’s output as ground truth, systems incorporate independent validation steps before actions are executed. Multiple agents, external checks, business rules, or verification workflows help identify errors before they become operational incidents.

The second is explainability. Effective systems maintain a decision trail that captures inputs, intermediate reasoning steps, tool usage, verification activities, and outputs in a form that human reviewers can understand.

Together, these capabilities create something that has long been expected of human decision-makers but is often missing from AI systems: the ability to show your work.

The regulatory and business reality

The push toward AI observability is not being driven solely by technologists.

Regulators increasingly expect organizations to demonstrate oversight of automated decision-making systems. Emerging AI governance frameworks place growing emphasis on transparency, traceability, accountability, and human oversight.

Customers are moving in the same direction. Whether the decision involves pricing, service, eligibility, or support, people increasingly want the ability to understand and challenge outcomes that affect them.

The result is a convergence of operational, regulatory, and market pressures around a single requirement: organizations must be able to explain what their AI systems are doing.

Three questions every CIO should ask

Before deploying autonomous AI systems, technology leaders should be able to answer three basic questions:

1. Can we reconstruct the complete decision path that led to an action?
2. Can we verify critical outputs before actions are executed?
3. Can a human auditor understand why the decision occurred?

If the answer to any of those questions is no, the organization may be granting more authority to AI than it can responsibly govern.

Accountability will become a competitive advantage

The organizations that succeed with autonomous AI will not necessarily be those that automate the most processes or deploy the largest models. They will be the organizations that combine automation with accountability.

Black-box systems made sense when AI primarily generated predictions. As AI increasingly acts on behalf of businesses, customers, and employees, visibility becomes essential.

The future of enterprise AI will belong not to systems that merely act, but to systems whose actions can be examined, understood, and trusted.

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New Tech Forum provides a venue for technology leaders—including vendors and other outside contributors—to explore and discuss emerging enterprise technology in unprecedented depth and breadth. The selection is subjective, based on our pick of the technologies we believe to be important and of greatest interest to InfoWorld readers. InfoWorld does not accept marketing collateral for publication and reserves the right to edit all contributed content. Send all inquiries to doug_dineley@foundryco.com.