The Day in AI

• Anthropic renamed Max 5x to Max and Max 20x to Ultra at $100 and $200 a month, and removed the 5-hour limit for verified Ultra accounts.
• OpenAI released gpt-6-rosalind, a life sciences model for biological reasoning and scientific tool use, to organizations approved through its trusted-access program.
• ByteDance added Kimi K3.1 Pro, GLM-5.3 and DeepSeek-V4.1-Flash to Doubao Work for Team and Enterprise customers, billed from existing AI credits.
• OpenAI said it will honor a shared robots.txt signal that lets websites state AI training preferences to several providers at once.
• Mistral AI released the weights of Mistral Large 4, a 1-trillion-parameter model it says leads open-weight models on FrontierCode.
• Nvidia is in talks to provide credit support for a cloud provider's $45 billion Anthropic project, according to The Information.

Max 5x is now called Max at $100 a month, and subscribers don't need to do anything. The limit removal starts on 30 October with most existing Ultra subscribers. Newer accounts keep the 5-hour limit for now, and the announcement doesn't say when that changes.

The rename follows a change in what these plans include. Anthropic's release notes dated 21 October list monthly API credits of $100 for Max and $200 for Ultra, plus a pooled Team allowance capped at $500, with unused credits expiring each billing cycle. Those figures are only partly confirmed against the source. OpenAI made a similar move on 28 October, letting eligible ChatGPT Pro and Business subscribers claim up to $500 a month in API credits by linking an API organization they own.

OpenAI also listed gpt-6-rosalind in its API changelog on 30 October. It's a model for complex life sciences research, with biological reasoning and scientific tool use, and it follows the earlier GPT-Rosalind models. Access is limited to organizations approved for Rosalind Research through the trusted-access program, for internal research by authorized users. OpenAI published no benchmarks or prices in the changelog entry.

ByteDance opened Doubao Work to rival models on 29 October. Kimi K3.1 Pro, GLM-5.3 and DeepSeek-V4.1-Flash now sit in the model picker for Team and Enterprise plans, and administrators can grant access by member, department, group or company. Companies don't need separate API accounts with each vendor. Tencent's figures put Doubao Work at 30.39 million visits in September. Its own WorkBuddy had 85.34 million.

• OpenAI said it aims to support, in the coming months, a shared robots.txt AI training signal drawn from the IETF AI Preferences working group, alongside its existing crawler controls.
• OpenAI committed to a twice-yearly Community Safety Report and tightened ChatGPT limits on violence and weapons content for users it predicts are under 18.
• Mistral AI released Mistral Large 4 weights on 29 October, reports 19.7% on Cognition FrontierCode 2.0, and prices it at $0.70 per million input tokens and $2.10 per million output tokens.
• Google reportedly moved the Computer Use tool in the Gemini API to general availability on both the Interactions API and the GenerateContent API.
• Tencent Hunyuan published the technical report for Hy-Nomas, its open interactive video world model, along with Hy-Nomas-Bench, a 280-case world model benchmark.
• AgiBot launched GO-3 Preview and says a G2 robot's convenience-store task success rose from 28.6% to 85.7% over five days without human demonstrations.
• Anthropic was the subject of reports that a backdoored Claude Code extension for VS Code appeared on the Cursor marketplace.
• Salesforce acquired Rune Technologies, which makes AI military logistics software, for a reported $375 million in cash and stock.