OpenAI
GPT-5.1 Chat Pricing
API pricing for GPT-5.1 Chat by OpenAI. Input tokens cost $1.25/1M, output tokens cost $10/1M with 128K context window.
Last updated:
ReasoningToolsVision
Input Cost
$1.25
per 1M tokens
Output Cost
$10
per 1M tokens
Context Window
128K
tokens
Cost Calculator
Estimated Cost:
$0.00
Model Details
Provider
OpenAI
Model ID
gpt-5.1-chat-latest
Context Window
128K tokens
Max Output
16384 tokens
Cache Read Cost
$0.125/1M
Release Date
2025-11-13
Compare Alternatives
| Model | Input | Output | Context |
|---|---|---|---|
| GPT-5.1 Chat (this model) | $1.25 | $10 | 128K |
| Gemini 2.5 Pro Google | $1.25 | $10 | 1M |
| Gemini 2.5 Pro Preview 05-06 Google | $1.25 | $10 | 1M |
| Gemini 2.5 Pro Preview 06-05 Google | $1.25 | $10 | 1M |
| GPT-5 OpenAI | $1.25 | $10 | 400K |
| GPT-5 Chat (latest) OpenAI | $1.25 | $10 | 400K |
Available from Resellers
GPT-5.1 Chat is also available through these resellers and gateways:
| Reseller | Model | Input | Output |
|---|---|---|---|
| Abacus | GPT-5.1 Chat Latest | $1.25 | $10 |
| Azure | GPT-5 Chat | $1.25 | $10 |
| Azure | GPT-5.1 Chat | $1.25 | $10 |
| Azure | GPT-5.2 Chat | $1.75 | $14 |
| Azure Cognitive Services | GPT-5 Chat | $1.25 | $10 |
| Azure Cognitive Services | GPT-5.1 Chat | $1.25 | $10 |
| Azure Cognitive Services | GPT-5.2 Chat | $1.75 | $14 |
| Helicone | OpenAI ChatGPT-4o | $5 | $20 |
| Helicone | OpenAI GPT-5 Chat Latest | $1.25 | $10 |
| Helicone | OpenAI GPT-5.1 Chat | $1.25 | $10 |