GPT 5.1 Codex Max
openai/gpt-5.1-codex-max
OpenAI ModelsGPT‑5.1-Codex-Max is purpose-built for agentic coding.
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.1-codex-max', prompt: 'What is the history of the San Francisco Mission-style burrito?'})Try out GPT 5.1 Codex Max by OpenAI. Usage is billed to your team at API rates. Free users get $5 of credits every 30 days, and you are considered a free user if you haven't made a payment.
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| 1048K | 33K | $0.40/M | $1.60/M | Read:$0.10/M Write:— | — | — | |
| 1048K | 33K | $0.10/M | $0.40/M | Read:$0.03/M Write:— | — | — | |
| 128K | 16K | $2.50/M | $10.00/M | Read:$1.25/M Write:— | — | — | |
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| 128K | 16K | $1.25/M | $10.00/M | Read:$0.13/M Write:— | $10.00/M | $10.00/K + input costs | |
| 400K | 128K | $1.25/M | $10.00/M | Read:$0.13/M Write:— | — | — | |
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| 400K | 272K | $15.00/M | $120.00/M | — | $120.00/M | $10.00/K + input costs | |
| 400K | 128K | $1.25/M | $10.00/M | Read:$0.13/M Write:— | — | $10.00/K + input costs | |
| 400K | 128K | $0.25/M | $2.00/M | Read:$0.03/M Write:— | — | $10.00/K + input costs | |
| 128K | 16K | $1.25/M | $10.00/M | Read:$0.13/M Write:— | — | $10.00/K + input costs | |
| 400K | 128K | $1.25/M | $10.00/M | Read:$0.13/M Write:— | — | $10.00/K + input costs | |
| 400K | 128K | $1.75/M | $14.00/M | Read:$0.17/M Write:— | — | — | |
| 128K | 16K | $1.75/M | $14.00/M | Read:$0.17/M Write:— | — | — | |
| 400K | 128K | $21.00/M | $168.00/M | — | — | — | |
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