Claude Code v2.1.283
Claude Code v2.1.283 was released on .
Summary
Claude Code 2.1.283 makes it easier to manage which AI models your team can use, with new controls to lock in specific versions and block others—keeping you in charge when new releases roll out. We've also added tools to audit your prompts and configurations against current be...
Release Context
- This was the 227th Claude Code release of 2026 tracked by Havoptic.
- It shipped 1 day after Claude Code v2.1.282 (September 24, 2026).
- Claude Code: ships every 1.1 days — 28 releases in the last month.
Why it matters: Audit prompts designed for older Claude models instantly.
Shipped around the same time
Within 3 days of this release, other AI coding tools also shipped:
- OpenAI Codex CLI rust-v0.157.1 (September 26, 2026)
- Antigravity CLI v1.2.11 (September 25, 2026)
- OpenAI Codex CLI rust-v0.157.0 (September 25, 2026)
- Antigravity CLI v1.2.10 (September 24, 2026)
- Devin Desktop v3.10.35 (September 24, 2026)
Compare Claude Code: vs OpenAI Codex CLI · vs Cursor · vs Gemini CLI · vs Kiro CLI · vs GitHub Copilot CLI · vs Devin Desktop · vs Antigravity CLI · vs Grok Build
Release Notes
- Added 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 CLAUDECODEGATEWAYHINTHEADERS=1
- Added availableModelsMatch managed setting: with "exact", an availableModels entry allows only the model version it names, so new releases stay blocked until listed
- Added deniedModels managed setting to block specific models, even when availableModels allows them
- Added MCP tool, WebFetch and WebSearch outputs to the tool.output OpenTelemetry span event when OTELLOGTOOLCONTENT=1
- Added /doctor prompt-audit (also /checkup prompt-audit) to audit your CLAUDE.md files, skills, agents and commands for prompting patterns written for older models
- Added click-to-expand for truncated messages from your other sessions in fullscreen mode
- Added path to --plugin-dir load-failure entries in the stream-json system/init pluginerrors, naming the directory that did not load
- Added an opt-in loadtestmode block to the Claude apps gateway config: requests are built and signed but not sent upstream, and clients get a canned reply, so a deployment can be load tested
- Added a mantle upstream provider to the Claude apps gateway for Ama
Other Recent Claude Code Releases
- v2.1.281 (September 23, 2026)
- v2.1.280 (September 22, 2026)
- v2.1.278 (September 19, 2026)
- v2.1.277 (September 18, 2026)
- v2.1.276 (September 18, 2026)
All Claude Code releases · All AI coding tool releases on Havoptic