Claude Code 2.1.280 ships 114 changes, makes Opus 5.5 with 1M context the default
ClaudeCodeLog · x · 2026-09-23
Claude Code CLI 2.1.280 lands with 114 changes. Headline: the default Opus model is now Claude Opus 5.5 with 1M context, priced at $4/$20 per Mtok and $0.20/Mtok cache reads.
Other highlights:
- Mouse support for more fullscreen lists (/skills wheel scroll, /plugin clickable state options)
- New CLAUDECODEMAXMCPDESCRIPTIONLENGTH env var to raise the 2,048-character cap on MCP tool descriptions
- Hook output sizes added to the hookexecutioncomplete OpenTelemetry event
- Fixed symlink-path writes being judged by their in-tree spelling, which could bypass acceptEdits/allow rules
- Auto mode now denies once on declined safety reviews and backs off on silent checks to avoid retry loops
Related event: Claude Code 2.1.280 Ships with Opus 5.5 as Default Model(3 posts)→
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