OpenAI API model_not_found: Model Does Not Exist or You Do Not Have Access
Quick answer
A 404 model_not_found means a typo, a retired model, or a key without access. List your models, check the deprecations page, and switch to the replacement.
Most likely fix: List models for your key
How to fix it
Try these in order — the most common fix is first.
1. List models for your key
- Call GET /v1/models and look for the name
Did this fix it?2. Check deprecations
- Open the OpenAI deprecations page and use the listed replacement
Did this fix it?3. Check verification and tier
- See the organization verification guide
Did this fix it?4. Check project
- Confirm the key belongs to a project with model access
Did this fix it?
Symptoms
404 "The model X does not exist or you do not have access to it".
Why it happens
- Typo in model name
- Model retired (some chat-latest aliases returned 404 after deprecation)
- Tier or verification gating
- Wrong project key
This guide also covers
- openai model_not_found
- openai model does not exist or you do not have access
- openai model deprecated
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Other OpenAI errors
- OpenAI API 429 Too Many Requests (Rate Limit)
- OpenAI API Error: You Exceeded Your Current Quota (insufficient_quota)
- OpenAI API 401 Incorrect API Key Provided
- OpenAI API 500 and 503 Server Errors (server_is_overloaded)
- OpenAI API Request Timed Out / 504 Gateway Timeout
- OpenAI API Credits Expired or Balance Disappeared
- OpenAI "Your Organization Must Be Verified" 403 Error
- OpenAI API context_length_exceeded: Maximum Context Length Error