GPT-5.1 (2025-11-13) API
About
Process massive datasets with GPT-5.1 (2025-11-13), featuring an expansive 1.0M context window for long-document analysis. This model delivers cost-effective pricing at $1.25/1M input and $10.00/1M output tokens. Access GPT-5.1 (2025-11-13) via the NanoGPT API with up to 33K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
No
Structured Output
No
Tool Use
No
WeightsClosed
Temperature
Fixed
Attachment
Not Supported
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
33K
Tokens
Pricing
Standard (per 1M tokens)
Input
$1.25
Output
$10.00
Frequently Asked Questions
GPT-5.1 (2025-11-13) by NanoGPT costs $1.25 per 1M input tokens and $10.00 per 1M output tokens.
Model Details
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
NANO_GPT_API_KEY
API Base URL
https://nano-gpt.com/api/v1