GPT-5.1
Legacy pinned workloads; unlike gpt-5 it carries no announced shutdown date yet, but its Sep-2024 cutoff is now two years stale.
Data checked 2026-09-06
OpenAI
ga
gpt-5.1
- Context window
- 400K tokens in
- Max output
- 128K tokens out
- Input
- $1.25 per 1M tokens
- Output
- $10.00 per 1M tokens
- Cached input
- $0.13 per 1M tokens
- Blended
- $3.44 3:1 in:out
- Knowledge cutoff
- 2024-09-30
- Released
- 2025-11-13
- Licence
- proprietary
A What it is for
At a three-to-one input-to-output ratio, GPT-5.1 costs $3.44 per million tokens blended. A workload of one million input and 330,000 output tokens per day would run about $136.50 per month at list price, before caching or batch discounts.
B Capabilities
tools vision reasoning prompt-caching batch streaming structured-output web-search
| Input modalities | text, image |
|---|---|
| Output modalities | text |
| Batch discount | 50% off asynchronous requests |
C Others from OpenAI
| Model | Context | Max out | In $/M | Out $/M | Blended | Status |
|---|---|---|---|---|---|---|
GPT-6 Astra
gpt-6-astra
|
1.1M | 128K | $10.00 | $50.00 | $20.00 | ga |
GPT-5.6 Sol
gpt-5.6-sol
|
1.1M | 128K | $4.00 | $20.00 | $8.00 | ga |
GPT-5.6 Terra
gpt-5.6-terra
|
1.1M | 128K | $2.00 | $12.00 | $4.50 | ga |
GPT-5.6 Luna
gpt-5.6-luna
|
1.1M | 128K | $0.20 | $1.20 | $0.45 | ga |
GPT-5.6 Cyber
gpt-5.6-cyber
|
400K | 128K | $12.50 | $75.00 | $28.13 | ga |
Daybreak Blue (alias)
gpt-daybreak-blue-latest
|
1.1M | 128K | $4.00 | $20.00 | $8.00 | ga |
Daybreak Red (alias)
gpt-daybreak-red-latest
|
400K | 128K | $12.50 | $75.00 | $28.13 | ga |
GPT-5.5 Cyber
gpt-5.5-cyber
|
— | — | $12.50 | $75.00 | $28.13 | deprecated |
GPT-5.5
gpt-5.5
|
1.1M | 128K | $5.00 | $30.00 | $11.25 | ga |
GPT-5.5 Pro
gpt-5.5-pro
|
1.1M | 128K | $30.00 | $180.00 | $67.50 | ga |
GPT-5.4
gpt-5.4
|
1.1M | 128K | $2.50 | $15.00 | $5.63 | ga |
GPT-5.4 Mini
gpt-5.4-mini
|
400K | 128K | $0.75 | $4.50 | $1.69 | ga |
D Verify before you commit
Model pricing changes without notice and this page is a snapshot. Confirm against the vendor's own page before you build a budget on it.
Source: developers.openai.com · checked 2026-09-06 · OpenAI pricing · API docs