Vertex AI
kimi-k2-thinking-maas model retirement
Stopped workingSubscribe to Vertex AIShare
On October 21, 2026, model kimi-k2-thinking-maas was retired. Calls using this model fail since that date. The deprecation was previously announced on July 21, 2026.
The error you get
What Vertex AI answers a call to kimi-k2-thinking-maas once the model is gone, as recorded from real responses:
{"error":{"code":404,"message":"Publisher model `projects/{project}/locations/{region}/publishers/google/models/kimi-k2-thinking-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 kimi-k2-thinking-maas
Google recommends to Self-deploy Kimi K2 on Model Garden.
In Vertex AI's words
Model ID: kimi-k2-thinking-maas; Deprecation date: July 21, 2026; Retirement date: October 21, 2026; Self-deploy alternative: Self-deploy Kimi K2 on Model Garden
Facts
- API
- Vertex AI
aiplatform.googleapis.com - Model
kimi-k2-thinking-maas- Released
- November 13, 2025 (models.dev)
- 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 kimi-k2-thinking-maas shut down?
Calls to the model kimi-k2-thinking-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 kimi-k2-thinking-maas return once it is shut down?
Vertex AI answers HTTP 404: "Publisher model `projects/{project}/locations/{region}/publishers/google/models/kimi-k2-thinking-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.
When was kimi-k2-thinking-maas released?
kimi-k2-thinking-maas was released on November 13, 2025, 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.
kimi-k2-thinking-maas on other APIs 1
-
No date
Vertex AI
moonshotai/kimi-k2-thinking-maasModel retirement Deprecated, no date
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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.