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HomeModelsGPT-5.1

OpenAI model product

GPT-5.1

The best model for coding and agentic tasks with configurable reasoning effort. GPT-5.1 is our flagship model for coding and agentic tasks with configurable reasoning and non-reasoning effort.

Updated Aug 10, 2026. Default version: GPT-5.1

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LLMBoard scoreN/ANot scored
CoverageN/ANo published score
Context window400KTokens
Official input price$1.25OpenAI API

On this page

  • Specification
  • Capability
  • Benchmarks
  • Arena
  • Pricing
  • Versions
  • About
  • Similar models
  • FAQ

Model specification

Structured fields from the published default version.

Version
GPT-5.1
Released
Nov 13, 2025
Knowledge cutoff
Sep 30, 2024
Parameters
N/A
Context window
400K
Max output
128K
Inputs
image, text
Outputs
text
Open weights
No
License
Proprietary

Capability profile

This profile uses the latest version under this unique model that has a calculated LLMBoard score. Arena and price are excluded.

No capability profile

No published version under this unique model currently has enough benchmark coverage to calculate a score.

Benchmark results

Published benchmark records for the scored version currently unavailable.

No benchmark rows

No published benchmark result is linked to the scored version.

Arena results

Preference and agent-evaluation signals from published Arena datasets.

No published Arena match

The default version has no published Arena rows, or its source alias has not been resolved.

Pricing

Official vendor API PAYG pricing is summarized first. The table then lists individual provider offerings without treating their minimum as the official price.

Official API
$1.25 input, $10 output per 1M
Official provider
OpenAI
Lowest third-party
N/A
Tracked offerings
1
1 rows
Columns

Show columns

OpenAIgpt-5.1global$1.25$10400KAug 7, 2026

Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.

GPT-5.1 versions

All published versions linked to this unique model. The score columns identify the version used by the current overall ranking.

4 rows
Columns

Show columns

GPT-5.1Nov 13, 2025N/AN/A400K128KNoProprietary
GPT-5.1 HighNov 12, 2025N/AN/A400K128KNoProprietary
GPT-5.1 MediumNov 12, 2025N/AN/A400K128KNoProprietary
GPT-5.1 ThinkingNov 12, 2025N/AN/A400K128KNoProprietary

What is GPT-5.1?

A concise description based on the published model registry.

The best model for coding and agentic tasks with configurable reasoning effort. GPT-5.1 is our flagship model for coding and agentic tasks with configurable reasoning and non-reasoning effort.

Use the benchmark, Arena and pricing sections above as separate evidence. A missing field means the current data snapshot does not support that claim.

Data snapshot: 2026-08-07. Editorial model content is not available in the backend.

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FAQ

Common questions about GPT-5.1.

When was GPT-5.1 released?

GPT-5.1's default version was released on Nov 13, 2025.

How much does GPT-5.1 cost?

GPT-5.1's official API price is $1.25 per million input tokens and $10 per million output tokens via OpenAI.

Who created GPT-5.1?

GPT-5.1 is published under OpenAI in the model registry.

What is the context window for GPT-5.1?

The default version has a 400K token context window.

Is GPT-5.1 open weight?

No. The default version is not marked as having publicly available weights.

How many API providers offer GPT-5.1?

1 published provider offerings are linked to the default version.

What models should I compare GPT-5.1 with?

No nearby ranked alternatives are currently available.

Rankings

OverallCodingText ArenaPricing

Modalities

Image GenerationVideo GenerationSpeech-to-TextEmbeddings

Benchmarks

All BenchmarksReasoningMathCoding

Vendors

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