OpenAI: GPT-5.1-Codex-Max (openai/gpt-5.1-codex-max) costs $1.25 per 1M prompt tokens and $10 per 1M completion tokens, has a 400,000-token context window, and supports tool calling, structured outputs, reasoning and response format. Data updated 2026-10-30.
- Prompt price
- $1.25 / 1M tokens
- Completion price
- $10 / 1M tokens
- Context
- 400,000 tokens
- Input modalities
- text, image
- Output modalities
- text
- Tokenizer
- GPT
- Instruct type
- —
- Knowledge cutoff
- —
- Hugging Face
- —
Last price change: 2025-12-06
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
Price history
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