OpenAI's most advanced model to date, featuring a 2M context window and specialized training for complex multi-step reasoning. It excels at architectural planning, deep research, and autonomous code generation.
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FREQUENTLY ASKED QUESTIONS
Is GPT-5.3 Codex free?
GPT-5.3 Codex requires a paid subscription.
What can I do with GPT-5.3 Codex?
GPT-5.3 Codex is designed for Deep research, Software architecture, Complex reasoning. OpenAI's most advanced model to date, featuring a 2M context window and specialized training for complex multi-step reasoning.
How do I use GPT-5.3 Codex?
GPT-5.3 Codex is a large language model for text generation, analysis, and conversation. Access through the web interface. Enter prompts or questions to get responses.