OpenAI API / OpenAI API
OpenAI Batch API returns 404 for GPT-5 mini/nano models
Fix OpenAI Batch API 404 error when using GPT-5 mini or nano models with chat completions endpoint Includes evidence for OpenAI API troubleshooting demand.
- Category
- OpenAI API
- Error signature
The model gpt-5-mini-2025-08-07-batch does not exist or you do not have access (HTTP 404 on /v1/chat/completions batch endpoint)- Quick fix
- Compare the failing environment with a known working setup, then change one configuration value at a time.
- Updated
What this error means
The model gpt-5-mini-2025-08-07-batch does not exist or you do not have access (HTTP 404 on /v1/chat/completions batch endpoint) is a OpenAI API failure pattern reported for developers trying to fix openai batch api 404 error when using gpt-5 mini or nano models with chat completions endpoint. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.
Why this happens
Found in openai/openai-python repo issue #3071. Responses API works fine but chat completions batch endpoint returns 404. Affects paid batch API users. Category: OpenAI API.
Common causes
- Found in openai/openai-python repo issue #3071. Responses API works fine but chat completions batch endpoint returns 404. Affects paid batch API users. Category: OpenAI API.
Quick fixes
- Confirm the exact error signature matches
The model gpt-5-mini-2025-08-07-batch does not exist or you do not have access (HTTP 404 on /v1/chat/completions batch endpoint). - Check the OpenAI API account, local tool state, and provider configuration involved in the failing workflow.
- Compare the failing environment with a known working setup, then change one configuration value at a time.
Platform/tool-specific checks
- Verify the command, editor, extension, or API client that produced the error.
- Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
- Avoid deleting credentials, local model data, or project settings until the failing scope is clear.
Step-by-step troubleshooting
- Capture the exact error message and the command, editor action, or request that triggered it.
- Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
- Review the source evidence below and compare it with your environment.
- Apply one change at a time and rerun the smallest failing action.
- Keep the working fix documented for the team or deployment environment.
How to prevent it
- Keep provider/tool configuration documented.
- Record non-secret diagnostics such as tool version, provider name, model name, and command path.
- Add a lightweight check before CI or production workflows depend on the tool.
Sources checked
Evidence note: Found in openai/openai-python repo issue #3071. Responses API works fine but chat completions batch endpoint returns 404. Affects paid batch API users. Category: OpenAI API.
Related errors
- OpenAI API
FAQ
What should I check first?
Start with the exact The model gpt-5-mini-2025-08-07-batch does not exist or you do not have access (HTTP 404 on /v1/chat/completions batch endpoint) text and the smallest action that reproduces it.
Can I ignore this error?
No. Treat it as a failed OpenAI API workflow until the root cause is understood.
Is this guaranteed to have one fix?
No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.
How do I know the fix worked?
Rerun the same command, editor action, or request. The fix is working when that action completes without The model gpt-5-mini-2025-08-07-batch does not exist or you do not have access (HTTP 404 on /v1/chat/completions batch endpoint).