# GPT-5.1-Codex-Max — price & specs

Source: https://modelbank.ai/models/gpt-5.1-codex-max · updated 2026-11-12 · ModelBank

| Field | Value |
|---|---|
| Vendor | OpenAI |
| Input price | $1.25 / 1M tokens |
| Output price | $10 / 1M tokens |
| Cached input | $0.13 / 1M tokens |
| Context window | 400,000 tokens |
| Max output | 128,000 tokens |
| Input modalities | text,image |
| Reasoning / tool use | yes / yes |
| Intelligence / coding index | — / — |
| Released | 2025-12-04 |
| Retirement date | none announced |

## About

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

- 2026-09-24: $1.25 in / $10 out


JSON: https://modelbank.ai/api/v1/models/gpt-5.1-codex-max