Anthropic
claude-3-haiku model retirement
Stopped workingSubscribe to AnthropicShare
Anthropic retired model claude-3-haiku on April 20, 2026, following its deprecation on February 19, 2026. Calls targeting this model fail since that date.
The error you get
What Anthropic answers a call to claude-3-haiku once the model is gone, as recorded from real responses:
{"type":"error","error":{"type":"not_found_error","message":"model: claude-3-haiku"}}What to use instead of claude-3-haiku
Move to claude-haiku-4-5-20251001, recommended by Anthropic.
In Anthropic's words
API model name: claude-3-haiku-20240307; Current state: Retired; Deprecated: February 19, 2026; Tentative retirement date: April 20, 2026
Facts
- API
- Anthropic
api.anthropic.com - Model
claude-3-haiku- Kind
- Model retirement
- Announced
- February 19, 2026
- Takes effect
- April 20, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against Anthropic's own pages
Questions
When does claude-3-haiku shut down?
Calls to the model claude-3-haiku on Anthropic stopped working on April 20, 2026.
What happens to calls after April 20, 2026?
They have failed since April 20, 2026.
What error does claude-3-haiku return once it is shut down?
Anthropic answers HTTP 404: "model: claude-3-haiku". Send another model to fix it.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
claude-3-haiku on other APIs 1
-
Vertex AI
claude-3-haikuModel retirement Stopped working
More from Anthropic 10
-
claude-3-haiku-20240307Model retirement Stopped working -
claude-3-haiku-latestModel retirement Stopped working -
claude-opus-4Model retirement Stopped working -
claude-opus-4-0Model retirement Stopped working -
claude-opus-4-20250514Model retirement Stopped working -
claude-opus-4-latestModel retirement Stopped working -
claude-sonnet-4Model retirement Stopped working -
claude-sonnet-4-0Model retirement Stopped working -
claude-sonnet-4-20250514Model retirement Stopped working -
claude-sonnet-4-latestModel retirement Stopped working
You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.