← Model Graveyard Check

Anthropic

claude-sonnet-4-5

⏳ 25 days left

Yes. claude-sonnet-4-5 is deprecated and shuts down on November 30, 2026, in 25 days.

This is an alias of claude-sonnet-4-5-20250929, so it follows the same date.

Recommended replacement: claude-sonnet-5-5

Source: Anthropic deprecation page, announced September 30, 2026.

Is it still in your code?

Paste a file or a public GitHub repo URL into the scanner. It finds every model ID that is dead or dying, with the file and line, in your browser.

Scan my code for claude-sonnet-4-5 and the rest →

Or one line in a terminal or in CI (fails if a dead ID is found): curl -sL https://lira-ia.github.io/model-check/check.py | python3 - . · GitHub Action

Same date

claude-sonnet-4-5-20250929