What is GPT 5.3 Codex?
Tavory's live catalog currently lists GPT 5.3 Codex from Openai Responses. The catalog describes it as 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.. Availability, plan access and provider pricing can change and are checked again when a request is sent.