GPT-5.1 Codex
by OpenAI · gpt-codex family · released 2025-11-13
On output pricing, GPT-5.1 Codex is cheaper than 161 of the 618 priced models tracked here, at $10/Mtok. Its 400,000-token context window is larger than 542 of 706 models. Capabilities: vision, tools, reasoning, structured output.
Specifications
| Provider | OpenAI |
| Family | gpt-codex |
| Input price | $1.25/Mtok |
| Output price | $10/Mtok |
| Cache read price | $0.125/Mtok |
| Context window | 400,000 |
| Max output tokens | 128,000 |
| Input modalities | text, image |
| Output modalities | text |
| Capabilities | vision, tools, reasoning, structured output |
| Knowledge cutoff | 2024-09-30 |
| Released | 2025-11-13 |
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