openai

OpenAI: GPT-5.3-Codex

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. It achieves state-of-the-art results...

Input Cost

$1.75

per 1M tokens

Output Cost

$14.00

per 1M tokens

Context Window

400,000

tokens

Compare vs GPT-4o

                Developer ID: openai/gpt-5.3-codex            

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