Skip to content

News

AI news in September 2026: Codex, Claude & more

September 2026, from our verified data: 14 headlines, 59 posts from official X accounts, 46 releases (27 Claude Code, 19 Codex CLI) and 16 reset entries. Posts are our one-line summaries linked to the originals; releases link to their own pages, which summarise the changes; reset entries say whether a reset was completed, reported, announced or banked.

Headlines

Usage resets

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

Announcements on X

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

Claude Code releases (27)

  • Claude 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…
  • Claude 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,…
  • Claude 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 2.1.283Added x-claude-code-prompt-id to the gateway hint headers so LLM gateways can group the requests that serve one user prompt; opt in with CLAUDE_CODE_GATEWAY_HINT_HEADERS=1 ·…
  • Claude Code 2.1.282Added a maxProseWidth setting that caps the width of Claude's prose in wide terminals while tables and code blocks keep the full width ·…
  • Claude Code 2.1.281Added Claude apps gateway support for newer Claude Desktop keys in desktop policy blocks, including blockReadsOutsideWorkingDirectories and disableBypassPermissionsMode · Added assume_role on Claude apps…
  • Claude Code 2.1.280Added Claude Opus 5.5 (claude-opus-5-5), now the default Opus model — 1M context, $4/$20 per Mtok with $0.20/Mtok cache reads · Added mouse support…
  • Claude Code 2.1.278Changed auto mode for Claude API and Enterprise users, and on Bedrock, Vertex, Foundry and gateways, to default to the server-side classifier, which does…
  • Claude Code 2.1.277Added AGENTS.md support: in a project with no CLAUDE.md, Claude Code reads AGENTS.md instead; change it under "Project instructions" in /config (not yet on…
  • Claude Code 2.1.276Fixed every request failing with 400 … Input tag 'advisor_20260301' when ANTHROPIC_BASE_URL points at a proxy or gateway (2.1.275 regression)
  • Claude Code 2.1.275Added the signed-in account to Claude apps gateway sign-in: when the gateway names it, you confirm it before the credential is saved, and /status…
  • Claude Code 2.1.274Added a visible warning when memory usage is critical, with steps to free memory or restart safely · Added CLAUDE_CODE_MCP_STARTUP_WAIT_MS to bound how long…
  • Claude Code 2.1.273Added x-claude-code-request-class, x-claude-code-agent-type, x-claude-code-prev-tool-durations, x-claude-code-compaction and x-claude-code-context-compacted request headers for LLM gateways; opt in with…
  • Claude Code 2.1.272
  • Claude Code 2.1.271Added fast mode in Claude Code Remote sessions (cloud and self-hosted runners): the host's fast-mode setting or /fast typed in the session applies where…
  • Claude Code 2.1.270Fixed read-only git commands in Bash unexpectedly asking for permission after a session had been running for a while (regression in 2.1.269)
  • Claude Code 2.1.269Added claude plugin eval: run a plugin's eval suite against Claude Code and get scored, reproducible results (JSON + HTML report); see claude plugin…
  • Claude Code 2.1.268Added to the Claude apps gateway: with pricing: set in gateway.yaml, signed-in Claude Code clients receive the same rates through managed settings, so /cost…
  • Claude Code 2.1.267Added maxEffortLevel setting (top-level or per model under modelSettings): caps the effort level on every provider, including Bedrock, Vertex and Foundry; users can still…
  • Claude Code 2.1.266Fixed a 2.1.265 regression affecting LLM-gateway and proxy setups: the undocumented CLAUDE_CODE_USE_GATEWAY environment variable, previously ignored unless ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN were both set, began…
  • Claude Code 2.1.265Added user.email and user.groups to the telemetry Claude Desktop and Cowork send through a Claude apps gateway, matching terminal sessions · Added support for…
  • Claude Code 2.1.263
  • Claude Code 2.1.261Added an "Organization policy" line to /status and claude doctor that says why your organization's policy could not be loaded, such as a proxy…
  • Claude Code 2.1.260Added a diff panel that opens beside the conversation in fullscreen mode and shows your uncommitted changes as Claude edits; toggle it with /diff…
  • Claude Code 2.1.259Added managedMcpServers managed setting: organizations can provide HTTP/SSE MCP servers to every user (same entry shape as .mcp.json); entries that name a command to…
  • Claude Code 2.1.258Fixed Claude Code failing to launch on macOS 12 (Monterey), a regression introduced in 2.1.255 · Fixed remote and scheduled sessions failing with "user…
  • Claude Code 2.1.257Added Claude Fable 5.1 (claude-fable-5-1), now the default Fable model — 1M context, $10/$50 per Mtok with $0.25/Mtok cache reads · Added "Time format"…

Claude Code changelog

Codex CLI releases (19)

  • Codex 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…
  • Codex 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…
  • Codex 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…
  • Codex 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…
  • Codex 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 0.157.1Chores · Release highlights could not be determined: the supplied PR index is empty, and the GitHub tag comparison returned 404. · Changelog
  • Codex CLI 0.157.0Added GPT-6 Sol and Luna, including Amazon Bedrock support and migration prompts for older models. (#47332, #47347) · Enabled fullscreen transcripts by default and…
  • Codex CLI 0.156.1Choose GPT-6 Sol or GPT-6 Luna from the model picker. The rate-limit switch prompt now recommends GPT-6 Luna. (#47405) · Changelog · 47405 [hotfix…
  • Codex CLI 0.156.0Choose an optional fullscreen UI with /tui for your next launch, including transcript search, mouse selection, and right-click copying. (#46732, #46734, #46883, #46895) ·…
  • Codex CLI 0.155.1New local TUI sessions now leave reasoning summaries disabled by default, fixing request rejection by providers that do not support them. Explicit reasoning-summary settings…
  • Codex CLI 0.155.0Added experimental /voice conversations with live transcripts and microphone controls on supported builds, enabled through /experimental. (#43581, #43651, #44331) · The TUI now shows…
  • Codex CLI 0.154.0GPT-6-Astra is now available in the model picker and Amazon Bedrock catalogs. (#42879, #42619) · Experimental worktree support lets you create isolated checkouts for…
  • Codex CLI 0.153.4Fixed Astra’s visibility in the bundled model picker and made it the bundled default when no model is explicitly configured. (#42874) · Updated Astra’s…
  • Codex CLI 0.153.3Added GPT-6-Astra to the Amazon Bedrock model picker for Mantle and Runtime global/US routes. (#42805) · Corrected GPT-6-Astra’s guidance for asynchronous clarification questions to…
  • Codex CLI 0.153.2Corrected the GPT-6-Astra Fast tier description to say “2x speed, increased usage” instead of “1.5x.” This changes only the displayed text, not how requests…
  • Codex CLI 0.153.1Added support for configuring GPT-6-Astra through the API without changing the default model or showing it in the model picker. (#42605) · Changelog ·…
  • Codex CLI 0.153.0Vim mode now supports undo with u and redo with Ctrl+R, preserving complete drafts including pasted content and attachments. (#41941, #42140) · The plugin…
  • Codex CLI 0.152.1Guardian approval review now honors Node REPL policies provided through model metadata.
  • Codex CLI 0.152.0Vim mode supports / and ? searches within drafts, highlighted matches, and repeat navigation with n and N. (#41586) · Rate-limit banners offer actions…

Codex CLI changelog

Latest news · Usage reset tracker · All releases · Blog

Also tracked: Usage reset tracker · All releases · Blog