MODEL LINEAGE
中文
Model index
OpenAI·GPT

GPT-5.1

An adaptive-reasoning API update that reduced latency on easy tasks and added apply_patch and shell tools.

LegacyLanguageReasoningCodingAgentMultimodalWeights not released
MODEL NUMBER055
First public date
2025-11-13
Organization
OpenAI
Family
GPT
01

Specifications

Only published specifications are shown.

Context
400,000 tokens↗
Maximum output
128,000 tokens↗
Input modalities
Text · Image
Open weights
No
Status
Legacy
02

Overview

Release dates

— GPT-5.1 launched in the API with adaptive reasoning and new developer tools. ↗

03

Specifications alongside predecessor

Compared with GPT-5 ↗

PreviousGPT-5— · 400K ctx
CurrentGPT-5.1— · 400K ctx
04

Architecture & capabilities

Model capabilities

Adaptive reasoningCoding

Connected tools

Apply patchShell tool
05

Release history

General release

GPT-5.1 launched in the API with adaptive reasoning and new developer tools.

View source
06

Related models

Select a card to view the related model.

PredecessorGPT-5View details →SuccessorGPT-5.2View details →
07

Sources

01
Introducing GPT-5.1 for developersOpenAI · Published 2025-11-13
Official · Verified02
OpenAI API model specificationsOpenAI · Checked 2026-09-07
Official · Verified
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