An upgraded version of GPT-5 that adapts thinking time more precisely to the question to spend more time on complex questions and respond more quickly to simpler tasks.
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.1-thinking', prompt: 'Why is the sky blue?'})Try out GPT 5.1 Thinking 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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| 200K | 100K | 1.6s | 233tps | $1.50/M | $6.00/M | Read:$0.38/M Write:— | — | — |  | |
| 16K | 4K | 0.5s | — | $0.50/M | $1.50/M | — | — | — | | |
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| 128K | 4K | 1.0s | 28tps | $10.00/M | $30.00/M | — | — | — | | |
| 1048K | 33K | 0.7s | 39tps | $2.00/M | $8.00/M | Read:$0.50/M Write:— | — | — |  | |
| 1048K | 33K | 0.7s | 73tps | $0.40/M | $1.60/M | Read:$0.10/M Write:— | — | — | | |
| 1048K | 33K | 0.4s | 48tps | $0.10/M | $0.40/M | Read:$0.03/M Write:— | — | — | | |
| 128K | 16K | 0.6s | 78tps | $2.50/M | $10.00/M | Read:$1.25/M Write:— | — | — | | |
| 128K | 16K | 0.6s | 126tps | $0.15/M | $0.60/M | Read:$0.07/M Write:— | — | — | | |
| 128K | 16K | 1.7s | — | $0.15/M | $0.60/M | — | — | $10.00/K + input costs | | |
| 400K | 128K | 4.7s | 554tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | $10.00/M | — | | |
| 128K | 16K | 0.5s | 118tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | $10.00/M | $10.00/K + input costs | +1 | |
| 400K | 128K | 0.6s | 116tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | — | — | | |
| 400K | 128K | 4.2s | 268tps | $0.25/M | $2.00/M | Read:$0.03/M Write:— | — | — | | |
| 400K | 128K | 4.8s | 236tps | $0.05/M | $0.40/M | Read:$0.01/M Write:— | $0.40/M | — | | |
| 400K | 272K | — | — | $15.00/M | $120.00/M | — | $120.00/M | $10.00/K + input costs | +1 | |
| 400K | 128K | 0.5s | 162tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | — | $10.00/K + input costs | | |
| 400K | 128K | 2.5s | 253tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | — | $10.00/K + input costs | | |
| 400K | 128K | 0.5s | — | $0.25/M | $2.00/M | Read:$0.03/M Write:— | — | $10.00/K + input costs | | |
| 128K | 16K | 0.6s | 99tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | — | $10.00/K + input costs | | |
| 400K | 128K | 1.0s | 56tps | $1.75/M | $14.00/M | Read:$0.17/M Write:— | — | — | | |
| 128K | 16K | 1.2s | 82tps | $1.75/M | $14.00/M | Read:$0.17/M Write:— | — | $10.00/K + input costs | | |
| 400K | 128K | 1.0s | 76tps | $1.75/M | $14.00/M | Read:$0.17/M Write:— | — | $10/K + input costs | | |
| 400K | 128K | — | — | $21.00/M | $168.00/M | — | — | $10.00/K + input costs | | |
| 131K | 131K | 0.1s | 1280tps | $0.10/M | $0.50/M | Read:$0.08/M Write:— | — | — |    +5 | |
| 131K | 128K | 0.1s | 319tps | $0.07/M | $0.30/M | — | — | — |   | |
| 131K | 66K | 0.1s | — | $0.07/M | $0.30/M | Read:$0.04/M Write:— | — | — | | |
| 200K | 100K | 2.4s | — | $15.00/M | $60.00/M | Read:$7.50/M Write:— | — | — | | |
| 200K | 100K | 3.7s | 98tps | $2.00/M | $8.00/M | Read:$0.50/M Write:— | — | — | | |
| 200K | 100K | — | — | $10.00/M | $40.00/M | Read:$2.50/M Write:— | — | $10.00/K + input costs | | |
| 200K | 100K | 2.2s | — | $1.10/M | $4.40/M | Read:$0.55/M Write:— | — | — | | |
| 200K | 100K | — | — | $20.00/M | $80.00/M | — | — | — | | |
| 200K | 100K | 1.7s | 228tps | $1.10/M | $4.40/M | Read:$0.28/M Write:— | — | — | | |
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