Vertex AI
deepseek-r1-0528-maas model retirement
Stopped workingSubscribe to Vertex AIShare
Google retired model deepseek-r1-0528-maas on October 21, 2026, following its deprecation on July 21, 2026. Calls specifying model deepseek-r1-0528-maas fail since that day. This retirement affects all workloads using this model identifier on the platform.
The error you get
What Vertex AI answers a call to deepseek-r1-0528-maas once the model is gone, as recorded from real responses:
{"error":{"code":404,"message":"Publisher model `projects/{project}/locations/{region}/publishers/google/models/deepseek-r1-0528-maas` was not found or your project does not have access to it. Ensure you are using a valid model name and that the model is available in the specified region.","status":"NOT_FOUND"}}What to use instead of deepseek-r1-0528-maas
Self-deploy DeepSeek-R1 on Model Garden as the replacement.
In Vertex AI's words
Model ID: deepseek-r1-0528-maas; Deprecation date: July 21, 2026; Retirement date: October 21, 2026; Self-deploy alternative: Self-deploy DeepSeek-R1 on Model Garden
Facts
- API
- Vertex AI
aiplatform.googleapis.com - Model
deepseek-r1-0528-maas- Kind
- Model retirement
- Announced
- July 21, 2026
- Takes effect
- October 21, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against Vertex AI's own pages
Questions
When does deepseek-r1-0528-maas shut down?
Calls to the model deepseek-r1-0528-maas on Vertex AI stopped working on October 21, 2026.
What happens to calls after October 21, 2026?
They have failed since October 21, 2026.
What error does deepseek-r1-0528-maas return once it is shut down?
Vertex AI answers HTTP 404: "Publisher model `projects/{project}/locations/{region}/publishers/google/models/deepseek-r1-0528-maas` was not found or your project does not have access to it. Ensure you are using a valid model name and that the model is available in the specified region.". 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.
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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.