Vertex AI
MedLM model retirement
Stopped workingSubscribe to Vertex AIShare
Calls to the model MedLM on Vertex AI stopped working on September 29, 2025.
The error you get
What Vertex AI answers a call to MedLM once the model is gone, as recorded from real responses:
{"error":{"code":404,"message":"Publisher model `projects/{project}/locations/{region}/publishers/google/models/MedLM` 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"}}In Vertex AI's words
Access to MedLM will no longer be available on or after September 29, 2025.
Facts
Questions
When does MedLM shut down?
Calls to the model MedLM on Vertex AI stopped working on September 29, 2025.
What happens to calls after September 29, 2025?
They have failed since September 29, 2025.
What error does MedLM return once it is shut down?
Vertex AI answers HTTP 404: "Publisher model `projects/{project}/locations/{region}/publishers/google/models/MedLM` 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.