GPT-5.1

Iterative improvement on GPT-5 with enhanced reasoning and tool support.

gpt-5.1
STABLE
400,000 context
Starting at $1.25/M input tokens
Starting at $10.00/M output tokens
Streaming
Vision
Tools
Reasoning
JSON Output

Providers for GPT-5.1

LLM Gateway routes requests to the best providers that are able to handle your prompt size and parameters.

OpenAI

openai/gpt-5.1
Context Size
400k
Stability
STABLE
Pricing
Input
$1.25
/M
Cached
$0.13
/M
Output
$10.00
/M
Capabilities
Streaming
Vision
Tools
Reasoning
JSON Output
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