OpenAI: GPT-5.1 API Pricing
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
Input / 1M tokens
$1.25
Output / 1M tokens
$10.00
Cost per request (1K in / 500 out)
$0.0063
~$6.25 per 1M tokens mixed
Specifications
Context Window 400K tokens
Max Output Tokens 128,000
Vision Support Yes
Function Calling No
Streaming Yes
Modality multimodal
Release Date 2025-11-13
Price history will appear here after the first price change is detected.
More from OpenAI
Input / 1M tokens
$0.60
Output / 1M tokens
$2.40
Context: 128K Streaming
Multimodal
Input / 1M tokens
$5.00
Output / 1M tokens
$30.00
Context: 400K Vision Streaming
Input / 1M tokens
$0.50
Output / 1M tokens
$1.50
Context: 16K Streaming
Input / 1M tokens
$1.00
Output / 1M tokens
$2.00
Context: 4K Streaming
Similar Models from Other Providers
Multimodal
Input / 1M tokens
Variable
Output / 1M tokens
Variable
Context: 2.0M Vision Streaming
Multimodal
Input / 1M tokens
Free
Output / 1M tokens
Free
Context: 262K Vision Streaming
Multimodal
Input / 1M tokens
Free
Output / 1M tokens
Free
Context: 262K Vision Streaming
Multimodal
Input / 1M tokens
Free
Output / 1M tokens
Free
Context: 1.0M Vision Streaming
Multimodal
Input / 1M tokens
Free
Output / 1M tokens
Free
Context: 1.0M Vision Streaming