GPT-5.3-Codex
OpenAI's code-focused multimodal model with 400K-token context for software development and engineering tasks.
Model Card
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...
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