A new model ID, "claude-sonnet-4-5fLF", was detected in the @anthropic-ai/claude-code-darw

EXHIBIT 322 · URGENT

Jul 19, 2026 07:19 UTC binary @anthropic-ai/claude-code-darwin-arm64

A new model ID, "claude-sonnet-4-5fLF", was detected in the @anthropic-ai/claude-code-darwin-arm64 native binary, alongside new endpoints and internal feature flag strings.

READY TO POST:

anthropic's claude-code-darwin-arm64 binary just got an update, and a new model id 'claude-sonnet-4-5fLF' appeared. could this be a new sonnet variant?

seeing a new 'claude-sonnet-4-5fLF' model id surface in an anthropic binary. also some new endpoints like code.claude.com/docs/en/overview.

⚠️ FROM COMPILED BINARY — lower confidence, verify before posting. (May include bundled-dependency strings, not just first-party changes.) @anthropic-ai/claude-code-darwin-arm64 2.1.214 -> 2.1.215: +3941 strings, -3680 strings, 10 interesting [model_id] (1) + claude-sonnet-4-5fLF [feature_flag] (3) + /home/runner/work/claude-cli-internal/claude-cli-internal/src/frameV + <${um}>${n.length} background ${r} task(s) from the previous session have no completion record. ${l} They have been marked ${e}. ${c} Task ids in this notification beginning with "${kXo}" are internal scan markers, not tasks.</${um}> + @internal One-line summary shown to the user in the terminal when an asyncRewake hook exits with code 2. Defaults to "Stop hook feedback".) [endpoint] (6) + /api/claude_code/notification/preferences + ; +https://support.anthropic.com/)?J + https://api.anthropic.comT + https://claude.ai/chrome + https://code.claude.com/docs/en/overview` + https://github.com/anthropics/claude-code-action/blob/main/docs/setup.mdIF [sentence] (2) + <${um}>${n.length} background ${r} task(s) from the previous session have no completion record. ${l} They have been marked ${e}. ${c} Task ids in this notification beginning with "${kXo}" are internal scan markers, not tasks.</${um}> + @internal One-line summary shown to the user in the terminal when an asyncRewake hook exits with code 2. Defaults to "Stop hook feedback".)