OpenAI Realtime API invalid_beta Error After OpenAI-Beta Header Deprecation

What this error means

Unknown beta requested: 'realtime' — invalid_beta error on OpenAI Realtime API is a OpenAI API failure pattern reported for developers trying to fix openai realtime api invalid_beta error after openai-beta realtime header deprecation. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

LiteLLM PR #27690 (May 2026) documents the OpenAI API deprecation. realtime_translation_testing CircleCI job fails on every PR with: {“error”: {“code”: “invalid_beta”, “message”: “Unknown beta requested: ‘realtime’.”}} followed by TimeoutError: Timed out waiting for ‘session.created’. OpenAI deprecated the OpenAI-Beta: realtime=v1 header.

Common causes

• OpenAI deprecated the OpenAI-Beta: realtime=v1 header on the live Realtime API. Applications still sending this header receive {'error': {'code': 'invalid_beta', 'message': "Unknown beta requested: 'realtime'."}} followed by a TimeoutError waiting for ‘session.created’. This breaks CI/CD pipelines and production integrations that haven’t been updated.
• LiteLLM PR #27690 (May 2026) documents the OpenAI API deprecation. realtime_translation_testing CircleCI job fails on every PR with: {“error”: {“code”: “invalid_beta”, “message”: “Unknown beta requested: ‘realtime’.”}} followed by TimeoutError: Timed out waiting for ‘session.created’. OpenAI deprecated the OpenAI-Beta: realtime=v1 header.

Quick fixes

1. Confirm the exact error signature matches Unknown beta requested: 'realtime' — invalid_beta error on OpenAI Realtime API.
2. Check the OpenAI API account, local tool state, and provider configuration involved in the failing workflow.
3. 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

1. Capture the exact error message and the command, editor action, or request that triggered it.
2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
3. Review the source evidence below and compare it with your environment.
4. Apply one change at a time and rerun the smallest failing action.
5. 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

• https://github.com/BerriAI/litellm/pull/27690

Evidence note: LiteLLM PR #27690 (May 2026) documents the OpenAI API deprecation. realtime_translation_testing CircleCI job fails on every PR with: {“error”: {“code”: “invalid_beta”, “message”: “Unknown beta requested: ‘realtime’.”}} followed by TimeoutError: Timed out waiting for ‘session.created’. OpenAI deprecated the OpenAI-Beta: realtime=v1 header.

Related errors

• OpenAI API deprecated header error
• OpenAI Realtime API session.created timeout
• OpenAI-Beta header removed 2026

FAQ

What should I check first?

Start with the exact Unknown beta requested: 'realtime' — invalid_beta error on OpenAI Realtime API 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 Unknown beta requested: 'realtime' — invalid_beta error on OpenAI Realtime API.