OpenAI

OpenAI: GPT-5.3-Codex

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.

Context window: 400,000 tokens
Input: text, image, file
Output: text
Pricing: $1.75/M input tokens, $14/M output tokens

RuntimeWire coverage

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View on OpenRouter. Model data sourced from OpenRouter.