openai/gpt-5.3-codex
Compare openai/gpt-5.3-codex API prices and supported endpoints on FullSpeed. Review current model details before integrating; route availability varies.
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2.