Best API

Best API is an OpenAI-compatible API layer built for one clear purpose: helping developers bring down their AI inference costs without disrupting how they already work. Running high-volume AI applications can get expensive fast, and token costs often eat into margins before teams realize it.

With Best API, switching is as simple as changing your base URL. Acting as a drop-in replacement for the OpenAI SDK, it lets you point your existing setup to its endpoint and instantly save 25% on token costs — no rewriting, no retraining your team, and no new tooling to learn.

Compatibility is a core promise. The service supports a wide range of models, including the GPT-5 series and specialized codex models, while maintaining full alignment with existing developer workflows and SDK patterns. That means your code keeps working exactly as before, with fewer changes required.

For teams running high-volume applications, Best API is designed to improve unit economics while requiring minimal code changes, so you keep shipping at the same pace — just at a lower cost per token.