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- GPT-5.1-Codex-MaxOpenAIRemove
| Attribute | GPT-5.1-Codex-Maxgpt-5.1-codex-max |
|---|---|
| Pricing | |
| Input | $0.375 / 1M |
| Output | $3.00 / 1M |
| Cache Write (5m) | $0.375 / 1M |
| Cache Write (1h) | $0.375 / 1M |
| Cache Read | $0.375 / 1M |
| Web Search | $0 / 1M |
| Context | |
| Max context | 400K |
| Max output | N/A |
| Capabilities | |
| Vision | Yes |
| Function Calling | Yes |
| JSON Mode | Yes |
| Streaming | Yes |
| Catalogue | |
| Provider | OpenAI |
| Category | chat |
| Charge type | Pay As You Go |
| Released | — |
| Description | |
| Summary | GPT-5.1 Codex Max is OpenAI's advanced agentic coding model, built for long-running, high-context development work. Using an upgraded 5.1 reasoning stack and training on real engineering workflows, it delivers faster performance, stronger reasoning, and better token efficiency across the full software lifecycle. |