AI news: week of Sep 28 – Oct 4, 2026

Headlines

• 30 SeptGoogle Independent tests put Gemini 4 Argon level with GPT-6 AstraArtificial Analysis scored Argon (high) at 53 on its Intelligence Index, equal to GPT-6 Astra at max effort. Vals AI placed it first on the Vals Index in results dated 30 September.
• 30 SeptGoogle Google announces Gemini 4 Argon, first for vetted cyber defendersGoogle's new frontier model raises the output limit to 1M tokens. It went first to trusted defenders in the Fairwind Program, with wider release planned after testing.
• 29 SeptOpenAI OpenAI releases GPT-6.1 SolOpenAI positions the upgrade to GPT-6 Sol as close to GPT-6 Astra on coding and professional work at one-fifth of Astra's token prices. It is available in the API and Codex.
• 29 SeptOpenAI OpenAI DevDay 2026: Ultrafast tier, Pro 500 plan and computer use in the Agents APIBesides dots and GPT-6.1 Sol, OpenAI announced an Ultrafast speed tier, a Pro 500 plan, computer use in the Agents API and ChatGPT Space for teams working with agents.
• 29 SeptOpenAI OpenAI introduces dots, always-on agents in ChatGPTDots run on GPT-6 Astra with their own cloud computer and browser and can keep working toward goals in the background. The rollout starts on Pro, Business Premium and Enterprise plans.
• 29 SeptOther US executive order replaces 'AI' with 'Super Intelligence' in federal usageThe order tells executive agencies to use 'Super Intelligence' (SI) instead of 'artificial intelligence' in new non-statutory documents. The legal meaning stays the statutory AI definition for now, with proposed legislative language due within 60 days.
• 28 SeptAnthropic Anthropic releases Claude Sonnet 5.5The second Claude 5.5 model is a faster, cheaper complement to Opus 5.5 for well-scoped everyday work, priced the same as Sonnet 5.

Usage resets

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

• 3 OctCodex Codex reset on Oct 3, 2026 (completed)Tibo reported the 2 October reset fixed for Pro 500 accounts that had not received it.
• 2 OctCodex Codex reset on Oct 2, 2026 (completed)Tibo confirmed that the global reset for paid ChatGPT accounts had propagated. The time shown is the confirmation post, not an exact reset execution time.
• 2 OctCodex Codex reset announced on Oct 2, 2026Tibo announced a global reset for all paid ChatGPT accounts at 10am PST the next day, after slow GPT-6.1 Sol performance. Completion was confirmed later on 2 October.

Announcements on X

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

• 4 OctCodex Tibo starts 28 days of either a clear improvement or a full reset every day.@thsottiaux · View on X
• 2 OctCodex Tibo confirms the global reset for paid accounts has propagated.@thsottiaux · View on X
• 2 OctCodex Tibo announces a global reset for all paid ChatGPT accounts the next day at 10am PST.@thsottiaux · View on X
• 1 OctClaude For two weeks, design, deck and doc work in the Claude app uses 50% less of usage limits.@claudeai · View on X
• 1 OctClaude Claude Code can now be modded with TypeScript mods shipped inside plugins.@ClaudeDevs · View on X
• 1 OctCodex Tibo shares the OpenAI Developers dots demo.@thsottiaux · View on X
• 1 OctCodex Tibo says there is no reset for now because primary dot usage is virtually unlimited.@thsottiaux · View on X
• 1 OctCodex MCP servers can now be built and deployed through ChatGPT Sites.@thsottiaux · View on X
• 1 OctCodex GPT-6.1 Sol demand and new capacity for ChatGPT and Codex.@thsottiaux · View on X
• 30 SeptCodex Tibo shares a portrait painted by his dot.@thsottiaux · View on X
• 30 SeptClaude Claude.dev launches as the new home for developers building with Claude.@ClaudeDevs · View on X
• 30 SeptClaude Claude Founder House is announced.@claudeai · View on X
• 30 SeptCodex Tibo asks what to ship next for dots and space.@thsottiaux · View on X
• 30 SeptCodex Dots community check-in.@thsottiaux · View on X
• 30 SeptCodex Dots rollout and early user feedback.@thsottiaux · View on X
• 30 SeptCodex DevDay community follow-up.@thsottiaux · View on X
• 30 SeptCodex Clarification of primary dot usage and Codex task usage.@thsottiaux · View on X
• 29 SeptCodex Tibo links the official DevDay announcement roundup.@thsottiaux · View on X
• 29 SeptCodex Tibo welcomes open-model support in Codex for enterprise teams.@thsottiaux · View on X
• 29 SeptCodex Official guidance for submitting ChatGPT plugins.@thsottiaux · View on X
• 29 SeptCodex ChatGPT plugin discovery opens another route to users.@thsottiaux · View on X
• 29 SeptCodex A recommended thread explains the new ChatGPT Space.@thsottiaux · View on X
• 29 SeptCodex Tibo shares the official GPT-6.1 Sol introduction.@thsottiaux · View on X
• 29 SeptCodex GPT-6.1 becomes available across paid plans and the API.@thsottiaux · View on X
• 29 SeptCodex ChatGPT subscriptions can be used in participating partner products.@thsottiaux · View on X
• 29 SeptCodex DevDay rollout updates follow problems during the live demonstrations.@thsottiaux · View on X
• 29 SeptCodex Tibo shares a short DevDay roundup.@thsottiaux · View on X
• 29 SeptCodex Developers can publish native plugin experiences inside ChatGPT.@thsottiaux · View on X
• 29 SeptCodex Dots access is announced for eligible subscription plans; rollout restrictions apply.@thsottiaux · View on X
• 29 SeptCodex Tibo reports growth and reliability improvements for the Responses API.@thsottiaux · View on X
• 29 SeptCodex Codex Cloud gains configurable environments; Agents API is also announced.@thsottiaux · View on X
• 29 SeptCodex Decisions API targets fast, constrained decisions with visual input support.@thsottiaux · View on X
• 29 SeptCodex GPT-6.1 Sol and faster model execution headline new model options.@thsottiaux · View on X
• 29 SeptCodex ChatGPT Space introduces shared documents and collaboration with agents.@thsottiaux · View on X
• 29 SeptCodex Dots introduces persistent assistants with their own tools and computer.@thsottiaux · View on X
• 29 SeptCodex Tibo shares OpenAI’s DevDay start-time teaser.@thsottiaux · View on X
• 29 SeptCodex Pro subscription allowances are explained ahead of DevDay; this is not a reset.@thsottiaux · View on X
• 29 SeptCodex Tibo previews DevDay announcements following the subscription update.@thsottiaux · View on X
• 29 SeptCodex Reopened Pro subscriptions use revised accounting; this is not a reset.@thsottiaux · View on X
• 28 SeptClaude A Sonnet 5.5 guide covers migration, effort settings and model selection.@ClaudeDevs · View on X
• 28 SeptClaude Claude shares guidance for designing evaluations and iteratively improving applications.@ClaudeDevs · View on X
• 28 SeptClaude An emoji becomes a printable 3D model in a Sonnet experiment.@claudeai · View on X
• 28 SeptClaude A foliage simulator compares early Sonnet 5 and 5.5 results.@claudeai · View on X
• 28 SeptClaude ClaudeDevs recommends Sonnet 5.5 for everyday coding tasks.@ClaudeDevs · View on X
• 28 SeptClaude Sonnet migration guidance covers pricing and control over upfront thinking.@ClaudeDevs · View on X
• 28 SeptClaude Claude introduces Sonnet 5.5, emphasizing improved speed and efficiency.@claudeai · View on X

Claude Code releases (6)

• 3 OctClaude Code 2.1.289Fixed a deny or ask rule on a nested part of a compound shell command not holding over a user-installed mod's approval on managed…
• 2 OctClaude Code 2.1.288Added $.ui.selection() for mods: returns the text you last selected in fullscreen mode and, when the selection lies within one transcript row, that row…
• 1 OctClaude Code 2.1.287Added Claude Mods: plugins may now modify deeper behavior · Added You should know, a built-in mod where a side agent watches your back…
• 30 SeptClaude Code 2.1.286Added a count such as "2 of 5" to the permission prompt when several permission requests stack up · Added mouse support for the…
• 29 SeptClaude Code 2.1.285Added CLAUDE_CODE_DISABLE_WEB_FETCH environment variable to turn off the WebFetch tool · Added claude --desktop to open the Claude desktop app on the current directory,…
• 28 SeptClaude Code 2.1.284Added Claude Sonnet 5.5 (claude-sonnet-5-5), now the default Sonnet model on the Anthropic API — 1M context, $2/$10 per Mtok with $0.20/Mtok cache reads…

Claude Code changelog

Codex CLI releases (6)

• 1 OctCodex CLI 0.160.0Browse older tasks in the agent command center with a keyboard-accessible “Show more” action. (#49106) · Select transcript text and paste with middle-click in…
• 30 SeptCodex CLI 0.159.3Eligible local sessions signed in with ChatGPT can now show optional reminders to complete account security setup. (#49744) · Changelog · 49744 [0.159] Backport…
• 29 SeptCodex CLI 0.159.2Suppressed console windows flashing on Windows when Codex launches background processes and sandboxed commands. (#49385) · Changelog · 49385 [0.159] Backport Windows console suppression…
• 29 SeptCodex CLI 0.159.1Added GPT-6.1 Sol as the default model in the bundled catalog and Amazon Bedrock Mantle and Runtime catalogs. (#49323, #49342) · Changelog · 49323…
• 29 SeptCodex CLI 0.159.0Opt-in instant_interrupt lets new input steer Codex during model responses or long-running code-mode calls. (#48135, #48141) · New sessions get a compact welcome screen…
• 28 SeptCodex CLI 0.158.0Configure copy-on-select and right-click paste in the fullscreen TUI. Copied transcript selections now preserve Markdown formatting. (#47639, #47896, #48118) · Connect to MCP servers…

Codex CLI changelog