OpenAI: GPT-5.1-Codex
OpenAI: GPT-5.1-Codex offers a 400,000-token context window at $1.25 per 1M input tokens and $10.00 per 1M output tokens. Supported inputs: text, image. Data via OpenRouter /models, as of Aug 26, 2026.
Source: OpenRouter /models · as of
Specifications
| Context window | 400,000 tokens |
|---|---|
| Input price | $1.25 / 1M tokens |
| Output price | $10.00 / 1M tokens |
| Input modalities | text, image |
| Output modalities | text |
| Model id | openai/gpt-5.1-codex |
Frequently asked questions
What is the context window of OpenAI: GPT-5.1-Codex?
OpenAI: GPT-5.1-Codex supports up to 400,000 tokens of context.
How much does OpenAI: GPT-5.1-Codex cost?
$1.25 per 1M input tokens and $10.00 per 1M output tokens (via OpenRouter /models, as of Aug 26, 2026).
What input types does OpenAI: GPT-5.1-Codex support?
OpenAI: GPT-5.1-Codex accepts text, image.
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