•Haiku 4.5 automatically uses Sonnet in plan mode, and Haiku for execution (i.e. SonnetPlan by default)
•3P (Bedrock and Vertex) are not automatically upgraded yet. Manual upgrading can be done through setting ANTHROPIC_DEFAULT_HAIKU_MODEL
•Introducing the Explore subagent. Powered by Haiku it'll search through your codebase efficiently to save context!
•OTEL: support HTTP_PROXY and HTTPS_PROXY
•CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC now disables release notes fetching

v2.0.17Claude Code Release NotesOct 15, 2025

Release containing 1 new feature and 5 other updates.

Total Changes

Days Since Previous Release

Version Type

Patch

Release Focus

Mixed

Category Breakdown

Added (1)

Other (5)

Post-Release Edits Detected

2 added

Last edit detected: Oct 15, 2025

•Haiku 4.5 automatically uses Sonnet in plan mode, and Haiku for execution (i.e. SonnetPlan by default)
•3P (Bedrock and Vertex) are not automatically upgraded yet. Manual upgrading can be done through setting ANTHROPIC_DEFAULT_HAIKU_MODEL
•Introducing the Explore subagent. Powered by Haiku it'll search through your codebase efficiently to save context!
•OTEL: support HTTP_PROXY and HTTPS_PROXY
•CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC now disables release notes fetching