GPT-5.1

OpenAI model details for pricing, context, and release tracking.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output
Model Specs
ProviderOpenAI
Model IDopenai/gpt-5.1
Prompt Price
per 1M tokens		$1.25
Completion Price
per 1M tokens		$10
Sample Workload Cost
1M input + 500K output		$6.25
Context Window400K
Release Date2025-11-13
Popularity RankUnranked
Daily DemandN/A

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Prices are normalized to USD per 1M tokens.
GPT-5.1 Calculating… Estimated monthly API cost
Unit prices $1.25 input / $10 output Per 1M tokens

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Model Introduction

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...

Best Fit

GPT-5.1 is best suited for general API evaluation.

Cost Example

A 1M input token plus 500K output token workload is estimated at $6.25.

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