AI news: week of Oct 26 – Nov 1, 2026

Headlines

• 30 OctAnthropic Claude renames Max 20x to Ultra and drops its 5-hour limit for verified accountsAnthropic renamed its Max plans: Max 5x is now Max at $100 a month and Max 20x is now Ultra at $200 a month. Verified Ultra accounts no longer have a 5-hour limit, starting with most existing subscribers, while weekly limits stay the same.
• 30 OctOpenAI OpenAI will honor a shared robots.txt signal for AI training preferencesOpenAI says it will respect a shared robots.txt signal that helps website operators state their AI training preferences to participating AI providers.
• 30 OctOpenAI OpenAI strengthens violence prevention in ChatGPT and adds protections for teensOpenAI is expanding ChatGPT's safeguards against violence with earlier interventions and new protections for teens. It also makes a new commitment to public safety reporting.
• 29 OctOpenAI OpenAI updates its Model Spec around five core valuesOpenAI published an updated Model Spec that sets out five core values to guide more capable AI toward sound judgment, human agency and faithfulness to human intent.
• 29 OctGoogle Gemini app can now create, preview and edit documents, PDFs and spreadsheetsIn the Gemini app users can now generate, preview and edit files such as documents, PDFs, presentations, spreadsheets and code inside the chat. PDFs work on web and mobile, other formats on the web only, for all users in all supported languages.
• 29 OctMistral Mistral releases the open weights of an improved Mistral Large 4Mistral published the weights of Mistral Large 4 (Le Chonk), its 1-trillion-parameter multimodal model, after three more weeks of training since the preview. It reports gains in coding, defensive cybersecurity and reasoning efficiency and adds three reasoning modes.
• 29 OctOpenAI OpenAI describes how it monitors its frontier models for misalignmentOpenAI explains its layered monitoring for detecting misalignment and unauthorized agent behavior in its frontier models, so responders can step in before incidents escalate.
• 28 OctOpenAI ChatGPT Pro and Business subscribers can claim up to $500 a month in API creditsOpenAI says eligible ChatGPT Pro and Business subscribers can now claim up to $500 per month in API credits to build apps and agents.
• 28 OctOpenAI ChatGPT dots can now be reached by text message, in preview for US Pro usersUsers can text their dot through iMessage or RCS with tasks, photos or voice notes, and the dot texts back with updates. Only the owner can text a dot. It is rolling out as a preview for Pro users in the US.
• 28 OctGoogle Google announces Gemini 4 Carbon, starting with cyber defendersGoogle announced Gemini 4 Carbon, its strongest model, built for long-horizon engineering and cybersecurity defense. It goes first to a subset of cyber defenders and trusted partners in the Fairwind Program, with developers, businesses and consumers to follow; the introductory API price is $2 / $10 per million input and output tokens.
• 28 OctMicrosoft Microsoft opens its Copilot agent harness to developers through FoundryMicrosoft is making the Copilot harness, the agent layer built by GitHub that runs Copilot Code, Copilot Studio, the GitHub Copilot app, the CLI and VS Code, available in Microsoft Foundry for building agents that work across more than 20 frontier models.
• 28 OctAnthropic Anthropic extends AI for Science credits to 20 foundations, institutes and projectsAnthropic's AI for Science program, which gives free Claude credits to researchers, now works with 20 partners, including the Sloan and Simons foundations, the US National Science Foundation, EMBL and the Francis Crick Institute. Funders pass credits on to researchers, institutes use them in-house, and some projects get them directly.
• 27 OctGoogle Google DeepMind announces Genie 4, a world model with native audioGenie 4 generates interactive worlds in real time that users can steer with text prompts, and produces sound and dialogue together with the scene. It is rolling out first as a research preview for trusted testers.
• 27 OctOpenAI OpenAI and Oracle expand their partnership to bring Oracle apps into ChatGPTOpenAI and Oracle are extending their partnership so that Oracle business applications and AI agents can be used in ChatGPT. The deal also covers OpenAI powering new Oracle offerings.
• 27 OctAnthropic Anthropic expands its GSA deal with a 40% government discount on ClaudeUnder a new agreement with the US General Services Administration, government customers get 40% off Claude Enterprise, Claude for Government and the Claude API, now including state, local, tribal and territorial governments. Anthropic estimates the savings at $1 billion.
• 26 OctOpenAI OpenAI releases GPT-6.1 Terra for fast computer use at a lower priceGPT-6.1 Terra is a fast, efficient model for visual reasoning, computer use and natural writing. It is available in ChatGPT Work and Codex on paid plans and in the API at $1 / $5 per million input and output tokens.
• 26 OctAnthropic Anthropic releases a Claude for Nonprofits plugin built with about 30 nonprofitsThe plugin adds skills and connectors for fundraising, marketing, hiring and board work, and helps teams set Claude up with their own context and AI policy. Anthropic says more than 25,000 nonprofits now use Claude.
• 26 OctOpenAI OpenAI shares model results on the Kakeya conjecture, ETH and quantum chromodynamicsOpenAI says its internal models proved the local smoothing conjecture in every dimension, which also resolves the Kakeya conjecture, and showed in a Lean-verified proof that the Exponential Time Hypothesis is false. Outside expert groups will examine the results, and a third result in physics will be written up by researchers first.
• 26 OctAnthropic Anthropic submits IPO registration to the SEC, plans Nasdaq listing as ANTAnthropic, PBC has filed a Form S-1 registration statement with the US Securities and Exchange Commission for a proposed initial public offering of its Class A common stock. It plans to list the shares on the Nasdaq Global Select Market under the symbol ANT.

Usage resets

Completed and reported resets, announcements and banked resets. Only Completed entries count as a finished reset. Full monthly logs: Codex resets in November 2026.

• 1 NovCodex Codex banked reset on Nov 1, 2026, 23:27 UTCDay 28, the last day of the 28-day series: posting at 3:27 pm Pacific on 1 November, Tibo wrote "Day 28/ Banked 2/2", reporting the second of the two banked Codex resets promised on Day 26 as granted.
• 1 NovCodex Codex banked reset on Nov 1, 2026, 00:43 UTC (Oct 31 US)Posting at 5:43 pm Pacific on 31 October, the day after the Day 26 post, Tibo wrote "Banked 1/2", reporting the first of the two banked Codex resets promised on Day 26 as granted.
• 31 OctCodex Codex banked reset on Oct 31, 2026 (Oct 30 US time)Day 26 of the 28-day series: alongside easier account switching on mobile (desktop coming soon), Tibo said "Next two days will be resets… banked…". The first was reported as granted on 1 November (UTC) with "Banked 1/2" and the second later that day with "Day 28/ Banked 2/2".
• 28 OctCodex Codex reset on Oct 28, 2026 (completed, Oct 27 US time)Day 23 of the 28-day series: posting at 11:29 pm Pacific on 27 October, before the promised midnight PST, Tibo wrote "And it's done", reporting the Codex reset as complete.
• 28 OctCodex Codex reset announced on Oct 28, 2026 (Oct 27 US time)Day 23 of the 28-day series: replying a minute after the Day 23 post, Tibo said the Codex reset "Lands by midnight PST". The post does not confirm completion.
• 26 OctCodex Codex reset on Oct 26, 2026 (completed)Day 21 of the 28-day series: posting at 10:21 pm Pacific on 25 October, Tibo wrote "today is a reset". The post names the day's item as a Codex reset but does not confirm it has landed. It landed on 26 October (UTC), as reset trackers' account monitors recorded; no separate completion post followed.

Announcements on X

Our one-line summaries of selected posts, each linked to the original. Not the full account timelines.

• 1 NovCodex Day 28: Tibo posts "Banked 2/2": the second of the two promised banked Codex resets has been granted.@thsottiaux · View on X
• 1 NovCodex Tibo posts "Banked 1/2": the first of the two promised banked Codex resets has been granted.@thsottiaux · View on X
• 31 OctCodex Day 26: switching between accounts gets easier on mobile, with desktop next; Tibo says the next two days bring banked resets.@thsottiaux · View on X
• 30 OctClaude Claude renames Max 5x to Max and Max 20x to Ultra at unchanged prices ($100 and $200 a month) and removes the 5-hour limit for verified Ultra accounts; weekly limits stay the same.@claudeai · View on X
• 29 OctClaude The Claude API raises the maximum request size for Messages and Token Counting from 32 MB to 128 MB, for image-heavy requests such as long computer-use sessions and large PDFs.@ClaudeDevs · View on X
• 29 OctClaude Claude mobile apps: on iPad and iPhone Duo, what Claude makes now opens beside the chat instead of over it and can go full screen.@claudeai · View on X
• 29 OctCodex Day 25: usage limits double for Pro 100/200/500 and Business Premium, and Pro 200 limits will not be cut.@thsottiaux · View on X
• 29 OctCodex Day 24: Tibo highlights that ChatGPT dots can now be reached by text message (iMessage or RCS), rolling out as a preview for Pro users in the US.@thsottiaux · View on X
• 28 OctClaude Claude for Legal adds a gallery of ready-made artifacts for contract review, regulatory horizon scans and cite checks that can be shared across a business.@claudeai · View on X
• 28 OctCodex Day 23: Tibo says the Codex reset is done and promises good news tomorrow.@thsottiaux · View on X
• 28 OctCodex Day 23: Tibo says the Codex reset lands by midnight PST.@thsottiaux · View on X
• 28 OctCodex Day 23: after joking about iCloud Mail and Calendar plugins, Tibo says today is a Codex reset day.@thsottiaux · View on X
• 26 OctCodex Day 22: GPT-6.1 Terra arrives, better at writing and computer use, with 2X more usage than GPT-6.1 Sol.@thsottiaux · View on X
• 26 OctClaude More than 25,000 nonprofits use Claude; a new Claude for Nonprofits plugin adds fundraising, marketing and hiring skills.@claudeai · View on X
• 26 OctCodex Day 21: Tibo says today is a Codex reset day and hints at more in the last seven days.@thsottiaux · View on X

Claude Code releases (4)

• 31 OctClaude Code 2.1.316Added CLAUDE_CODE_DISABLE_ULTRATHINK, which turns the ultrathink keyword off · Added pooled group budgets to the Claude apps gateway: one monthly budget that a group's…
• 30 OctClaude Code 2.1.314Added permissions.blockWritesOutsideWorkingDirectories: Write, Edit and NotebookEdit refuse paths outside the working directories in every permission mode · Added an optional groups list to Claude…
• 27 OctClaude Code 2.1.312Added oidc.user_id_claim to the Claude apps gateway, to identify people by an id_token claim other than sub, such as Microsoft Entra ID's oid ·…
• 26 OctClaude Code 2.1.311Added --hold-idle-file and --max-hold-min to self-hosted-runner, to keep an idle session while your host reports processes it left running · Added a tip for…

Claude Code changelog

Codex CLI releases (2)

• 29 OctCodex CLI 0.166.0Added keyboard-driven transcript selection with word, line, and page motions, integrated search, and configurable shortcuts. (#57221, #57222, #57223, #57224) · Rendered Markdown consistently in…
• 27 OctCodex CLI 0.165.0Added a built-in Google Cloud Vertex AI provider, configured with model_provider = "gcp". (#56265) · Added GPT-6.1 Terra to the model catalogs. (#57337) ·…

Codex CLI changelog