Anthropicurgenttrivial3 days left

claude-sonnet-4-5-20250929

Dated Sonnet snapshot. Messages API shape unchanged — swap the model id.

DeprecatedScheduled

Shutdown2026-09-29

Statusurgent

Replacementclaude-sonnet-4-6

Action requiredProduction calls using claude-sonnet-4-5-20250929 will fail after 2026-09-29. Update model strings and re-run integration tests before the cutoff.

Quick fix — copy & paste

Breaks on 2026-09-29

model = "claude-sonnet-4-5-20250929"

Use this instead

model = "claude-sonnet-4-6"

Weigh prompts on the new model Compare pricing All deprecations