Claude Code — November 2026 Releases

7 releases in November 2026.

What's new in Claude Code, November 2026

Claude Code adds Fable 5.2 default, MCP background tasks and deny-instead-of-prompt

So far in November 2026, Claude Code has added Claude Fable 5.2 (claude-fable-5-2) as the default Fable model, run MCP tasks in the background, and gained a setting that denies tool calls instead of waiting on permission prompts. Five releases have shipped so far, from v2.1.317 to v2.1.322.

On permissions and security, permissions.denyInsteadOfPrompting denies a call that would wait on a prompt and lets the turn continue. v2.1.321 fixed a read-only Bash command running outside the sandbox without a prompt, MCP OAuth requests sending refresh tokens to another host after a redirect, and deny rules not applying to files written by cp or mv into a directory. Auto mode behaves differently behind LLM gateways in v2.1.319; CLAUDECODEAUTOMODESERVER=0 keeps the built-in classifier.

Gateway admins get a cost report at GET /v1/organizations/analytics/cost. v2.1.322 adds fast mode on Vertex in the global, us and eu regions, falling back to standard speed if refused.

  • Claude Fable 5.2 (claude-fable-5-2) is now the default Fable model, with 1M context (v2.1.321)
  • MCP tasks in the terminal move to the background and report back when done; CLAUDECODEDISABLEMCPTASKBACKGROUND turns this off (v2.1.319)
  • permissions.denyInsteadOfPrompting denies calls that would wait on a prompt, including in subagents and teammates (v2.1.319)
  • Auto mode behind LLM gateways no longer falls back to the built-in classifier unless CLAUDECODEAUTOMODESERVER=0 is set (v2.1.319)
  • Security fixes: MCP OAuth secrets sent to a redirected host, and a read-only Bash command running outside the sandbox (v2.1.321)
  • Fast mode on Vertex in the global, us and eu regions, with fallback to standard speed (v2.1.322)

Upgrading from v2.1.316? See every change through v2.1.325.

Claude Code full changelog