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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