Anthropic has released version 2.1.307 of its Claude Code software development kit. This update includes numerous fixes and improvements, such as adjusting API versioning to October 21, 2026, and implementing OpenTelemetry events for safety checks during tool calls. The release also addresses issues with model-not-found errors when using specific context window configurations and resolves problems with prompt-caching headers on certain gateways. Additionally, it enhances the reliability of HTTP tool calls and improves recovery mechanisms for unparseable tool calls and background command interruptions. AI
IMPACT Improves developer experience and reliability for tools integrating with Anthropic's Claude models.
RANK_REASON This is a software development kit release, not a frontier model release or significant industry event.
Read on Claude Code — Releases →
- Anthropic
- Claude API
- Claude Code
- foundry
- GitHub
- HTTP
- Linux
- macOS
- OpenTelemetry
- opus[1m]
- v2.1.307
AI-generated summary · Google Gemini · from 2 sources. How we write summaries →