# OpenAI: GPT-5.1-Codex-Max

`openai/gpt-5.1-codex-max` — **openrouter** · CHAT

> OpenAI: GPT-5.1-Codex-Max (openai/gpt-5.1-codex-max) is a chat model from openrouter with a 400K-token context window; capabilities tools, vision, reasoning; input image, text; output text.

| Field | Value |
| --- | --- |
| Vendor | openrouter |
| Kind | CHAT |
| Context window | 400,000 tokens |
| Max output tokens | 128,000 tokens |
| Indicative price (US list) | $1.25 in / $10 out per 1M tokens (indicative US list — verify with vendor) |
| Input modalities | image, text |
| Output modalities | text |
| Capabilities | tools, vision, reasoning |
| Sources | committed, litellm, openrouter-api |
| Last verified | 2026-07-24 |

*Part of the [Model Catalog](https://openviglet.github.io/model-catalog/) — [openrouter models](https://openviglet.github.io/model-catalog/models/openrouter/) · [Vendor JSON](https://openviglet.github.io/model-catalog/by-vendor/openrouter.json) · [HTML](https://openviglet.github.io/model-catalog/models/openrouter/openai-gpt-5.1-codex-max.html)*