Claude Sonnet 4.5

Anthropic · claude-sonnet-4-5-20250929

● Healthy

Released2025-09-29

Retires2026-09-29in 3mo

Claude Sonnettext+vision1000k context64k max out

also matches: claude-sonnet-4-5-20250929claude-sonnet-4-5claude-sonnet-4.5microsoft/claude-sonnet-4-5anthropic/claude-sonnet-4-5-20250929anthropic/claude-sonnet-4-5

provider announcement →

Does your code call Claude Sonnet 4.5?

$ curl -fsSL https://llmstatus.ai/install.sh | bash

Then mm status in any repo — it finds every model you use and flags the ones on a clock. No account, nothing uploaded.

Get alerted before it retires →