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According to an article by Živě.cz, the unreleased Gemini 4 Argon model by Google reached first place in the Arena.ai leaderboard. The article states a significant lead over the competition, but does not include a specific score.
Google states that Gemini 4 Argon has a context window of one million tokens. The Decoder also reports up to one million output tokens. Access remains restricted to selected cybersecurity defenders in Fairwind Program.
New: Gemini 4 Argon is now available worldwide to developers, businesses and consumers.; The model is available through the API in AI Studio and on the Gemini platform.; Google AI Ultra subscribers have gained access in Google Antigravity.; AI Ultra and Pro subscribers have gained access in the Gemini app and AI mode in Google Search.; Under the new tier structure, free users and Plus subscribers have access only to Flash models.
OpenAI is developing specialized Dots agents for business roles and working on integration into the Agent 365 platform. The sources describe testing and pilot projects, rather than widespread availability of these agents.
New: The Dots offering includes specialized agents for marketing, legal work and accounting.
NVIDIA has released the open foundation model Kumo Tabular (28–215M parameters) for classification and regression on tabular data. According to the company, the model predicts without training, tuning, or feature engineering, and leads on the TabArena, BeyondArena, TALENT, and ScoringBench benchmarks.
The research paper introduces InfiMed2 – medical multimodal foundation models in versions with 4B and 27B parameters. According to the authors, the 4B model achieves 66.73% accuracy after RLVR and outperforms the larger Qwen3.5-9B, while the 27B model achieves 73.72 % on five benchmarks.
OpenAI has made GPT-6.1 Sol generally available on Amazon Bedrock with enterprise data security controls. The model was released in late September as a cheaper replacement for the postponed GPT-6.1 Astra, with coding performance that, according to OpenAI, approaches that flagship version at one-fifth of the price.
New: GPT-6.1 Sol is available on Amazon Bedrock; It matches the performance of GPT-6 Astra on the DeepSWE v1.1 test set; On DeepSWE v1.1, it outperforms GPT-6 Sol by 6.4 % with lower reasoning effort; Availability is expanding to AWS infrastructure through a third-party provider
The company xAI has introduced Grok 4.7 on Amazon Bedrock: a context window of 500 000 tokens and four reasoning effort levels. According to Artificial Analysis, performance on agentic tasks and knowledge work improves compared with Grok 4.6, but at roughly twice the token consumption.
The Claude Sonnet 5.5 model is available on Amazon Bedrock and in Claude Platform on AWS – according to AWS, a cheaper and faster option for well-defined tasks such as bug fixes, SQL generation, or UI testing.
The new family of open-source agentic models Holo4 (27B dense, 35B-A3B MoE) handles GUI control, writing and running code, MCP, and API all in one model. On OSWorld 2.0, Holo4-27B achieves 61.7% compared to 81.8% for the Opus 5.5 model, but at significantly lower cost.
The Claude Sonnet 5.5 model has been released with the identifier claude-sonnet-5-5. It is available via the Claude API as well as in the offerings of Amazon Bedrock, Claude Platform on AWS, Google Cloud, and Microsoft Foundry.
Boris Power, head of applied research at OpenAI, said that 80 to 90 percent of the company's research targets GPT-7, GPT-8 and further generations, because real value is created in the jump between generations, not in incremental versions such as GPT-5.1 to 5.2.
The Czech company BottleCap AI has released the second model in the ThinkingCap series, a modified version of Alibaba's Qwen 3.8-27B model. According to the manufacturer, it consumes 37% fewer thinking tokens with slightly higher accuracy, and it is free on Hugging Face.
From 29. 9. 2026, OpenAI is reopening the Pro plan at $200/month to new users and removing the 5-hour usage limit, but at the same time halving API credits per dollar. The company is thus moving from subsidized subscriptions toward payment based on actual usage. This follows the price reduction for the GPT-6 Sol and Luna models on 22. 9.
New: API credits per dollar halved; Pro plan at $200/month reopened to new users; 5-hour window for the weekly allotment removed; Strategic shift from subsidized subscription models to pay-per-use pricing; Microsoft is making similar changes with Copilot
Anthropic engineer Jackson Kernion explained why the writing of Claude models has gotten worse despite growing performance in math and code — according to him, the models have learned to write for other AI models, not for humans.
NVIDIA has published additional technical details on the open-weight model Nemotron 3 Diarization: according to the company, it is 41% more accurate than its predecessor and leads the Diarization-Bench leaderboard with an error rate of 14.72% (DER).
New: 41% better error rate than Streaming Sortformer (specific percentage); The model can be combined with Parakeet to create transcripts with speaker tags; Audio buffer adjustable to four levels (30.4–0.32 seconds); Error rate increases with more participants, strong noise, and hares of sound; The Voice Arena benchmark is strict – it counts overlapping speech and misalignments
According to its own announcement, OpenAI has improved prompt caching in the GPT-6 model - a higher cache hit rate, new diagnostics, explicit breakpoints in prompts, and controls to reduce latency and costs.
GPT-6 Sol and GPT-6 Luna from OpenAI are now generally available on the Amazon Bedrock platform at lower prices than GPT-5.6; according to OpenAI, GPT-6 Sol makes about half as many factual errors as GPT-5.6 Sol.
Anthropic, together with AWS, has made Claude Opus 5.5 available on Amazon Bedrock – according to the company, it is more efficient and cheaper per task than Claude Opus 5, with adaptive thinking and stricter safety classifiers.
The Claude Opus 5.5 model from Anthropic is now available in GitHub Copilot for Pro+, Max, Business and Enterprise plans. According to Anthropic, it handles tasks comparably to Opus 5, but with fewer steps and tokens.
Since 23 September 2026, Amazon Web Services has been making a biological AI model from The Biological Computing Company available to selected customers in limited testing. According to the manufacturer, the model mimics how brain cells process information and is intended to make video generation faster and cheaper.
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