Vertex AI · Model retirement
claude-3-5-sonnet
Stopped working
Calls to the model claude-3-5-sonnet on Vertex AI stopped working on February 19, 2026.
Facts
- API
- Vertex AI
aiplatform.googleapis.com - Model
claude-3-5-sonnet- Kind
- Model retirement
- Takes effect
- February 19, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
claude-3-5-sonnet on other APIs
- Anthropic Stopped working
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