What changes
1
Create a Phaseo API key
Create a key in Gateway Keys, then add it to every environment that runs your application.
2
Point the client at Phaseo
Keep the OpenAI SDK and change only its credentials and base URL first.
3
Verify model IDs and endpoint coverage
List the models available through Phaseo instead of assuming every previous alias resolves unchanged.Check every production workflow you rely on, including streaming, tools, structured outputs, images, audio, files, or batches. Use the API Reference to confirm the matching endpoint.
4
Test and roll out
Run the same representative prompts against your old and new configurations. Compare output shape, latency, token usage, errors, and cost before moving traffic gradually.
Migration checklist
- The Phaseo key is configured in development, staging, and production.
- The client base URL is
https://api.phaseo.app/v1. - Every production model ID appears in
GET /v1/models. - Non-streaming and streaming requests pass in staging.
- Tool calls and structured outputs pass if your application uses them.
- Rollback remains a configuration-only key and endpoint change.