OpenAI API
The default AI API — broad model selection, including GPT-5.5 and Sora.
OpenAI's API spans chat, embeddings, voice, images, video and the Operator agent. GPT-5.5 is the new flagship.
Pros
- — Broadest model selection
- — Realtime voice is excellent
- — Sora video included
Cons
- — Pricing changes frequently
Latest update
GPT-5.5 endpoint live; Realtime pricing cut 50%.