ToolClaudeClaude Code

Anthropic updates Claude Code with a new API

Original title: Claude Code 2.1.307

Plain language

What it is: Anthropic released an update to Claude Code, version 2.1.307, which includes bug fixes and performance improvements. The update transitions the Claude API code to a newer version and improves how the tool handles errors and connections.
How it works: The tool now automatically retries failed tool calls up to two times before stopping. It also improves the sign-in process and fixes issues with background tasks, file loading, and voice dictation.
Where it is available: This update applies to Claude Code, including its VSCode extension, cloud sessions, and self-hosted runners.
Example: A user can stop an active automatic code review subscription on a pull request by typing @claude review stop.

What it is: Claude Code version 2.1.307 has been released. It updates the Claude API code to version 2026-10-21 and adds a new OpenTelemetry event named claude_code.safety_event for tracking tool calls and safety checks.
How it works: The update fixes model-not-found errors when using the CLAUDE_CODE_DISABLE_1M_CONTEXT environment variable with specific model aliases. It also limits retries for HTTP MCP tool calls to read-only or idempotent tools when connections close mid-call.
Where it is available: The changes apply to the Claude Code CLI, the VSCode extension, self-hosted runners, and cloud sessions.
Example: Developers can use the command @claude review stop to end an active @claude review always subscription on a pull request.

The headline and explanation on this page are based on Anthropic's post. The full details are in the original.

Claude Code 2.1.307