DeepInfra
qwen/qwen3.5-4b model retirement
Stopped workingSubscribe to DeepInfraShare
DeepInfra retired the model qwen/qwen3.5-4b on June 11, 2026. Calls targeting this model fail since that date. Developers using this model must update their integration to continue processing requests.
What to use instead of qwen/qwen3.5-4b
Move to Qwen/Qwen3.5-9B, as recommended by DeepInfra.
Facts
- API
- DeepInfra
api.deepinfra.com - Model
qwen/qwen3.5-4b- Released
- March 2, 2026 (models.dev)
- Kind
- Model retirement
- Takes effect
- June 11, 2026
- Calls after that day
- Fail
- Source
- Model list
- Last updated
- Verified
- , against DeepInfra's own pages
Questions
When does qwen/qwen3.5-4b shut down?
Calls to the model qwen/qwen3.5-4b on DeepInfra stopped working on June 11, 2026.
What happens to calls after June 11, 2026?
They have failed since June 11, 2026.
When was qwen/qwen3.5-4b released?
qwen/qwen3.5-4b was released on March 2, 2026, according to models.dev.
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.
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You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.