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OpenAI model product

GPT-5.1-Instant

1 Instant is the next iteration of GPT-5, designed to be more conversational than earlier chat models.

Updated Aug 12, 2026. Default version: GPT-5.1 Instant

Compare
LLMBoard score61.3GPT-5.1 Instant
Coverage60%9 benchmark families
Context window400KTokens
Official input priceN/AOfficial price unavailable

On this page

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

GPT-5.1-Instant Specifications

Technical details for the model's default version.

Version
GPT-5.1 Instant
Released
Nov 12, 2025
Knowledge cutoff
Unknown
Parameters
N/A
Context window
400K
Max output
128K
Inputs
image, text
Outputs
text
Open weights
No
License
Proprietary

GPT-5.1-Instant Capability Profile

This profile uses the model's current scored version. Arena ratings and prices are shown separately.

GPT-5.1 Instant category scores

GPT-5.1-Instant Benchmark Results

Benchmark scores for GPT-5.1 Instant.

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MMMU85.4%036396.8%CAug 11, 2026
BrowseComp Long Context 128k90.0%04525.0%CAug 11, 2026
Tau2 Airline67.0%052381.8%CAug 11, 2026
FrontierMath26.7%091750.0%CAug 11, 2026
Tau2 Retail77.9%112660.0%CAug 11, 2026
Tau2 Telecom95.6%113570.6%CAug 11, 2026
AIME 202594.0%2611477.9%CAug 11, 2026
SWE-Bench Verified76.3%3110571.2%CAug 11, 2026
GPQA88.1%3423485.8%CAug 11, 2026

GPT-5.1-Instant Arena Results

Preference and agent-evaluation results for the default version.

No Arena results

The default version does not have a matching Arena result yet.

GPT-5.1-Instant Runtime Performance

Provider-specific output speed and catalog latency for GPT-5.1 Instant. Runtime does not affect the capability score.

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OpenAI212.195 tok/s2.408 s400K128KAug 11, 2026

Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.

GPT-5.1-Instant Pricing

Official vendor API pricing appears first, followed by individual provider offers.

Official API
N/A
Official provider
N/A
Lowest third-party
From $1.1 input, $9 output per 1M via Poe
Tracked offerings
1
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Poeopenai/gpt-5.1-instantglobal$1.1$9128KAug 11, 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-Instant Versions

Available versions of this model. The score column identifies the version used in the overall ranking.

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GPT-5.1 InstantNov 12, 202561.3N/A400K128KNoProprietary

What is GPT-5.1-Instant?

Key information about GPT-5.1-Instant and its available data.

1 Instant is the next iteration of GPT-5, designed to be more conversational than earlier chat models. It features improved instruction following and an adaptive reasoning capability that lets it decide when to think before responding.

1 Instant offers clearer and more engaging interactions, reducing jargon and enhancing user comprehension. It demonstrates significant improvements in coding tasks, making it a valuable tool for developers.

1 Auto routes each query to the model best suited for it, so users typically don't need to choose a model manually.

Data as of 2026-08-11.

GPT-5.1-Instant vs nearby models

Open a comparison with the three ranked models immediately above and below this model.

GPT-5.1-InstantvsNemotron 3 UltraGPT-5.1-InstantvsGPT-5.1GPT-5.1-InstantvsMiMoGPT-5.1-InstantvsKimi K2 ThinkingGPT-5.1-InstantvsLongCat Flash ThinkingGPT-5.1-InstantvsQwen3.6 27B

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FAQ

Common questions about GPT-5.1-Instant.

When was GPT-5.1-Instant released?

GPT-5.1-Instant's default version was released on Nov 12, 2025.

How much does GPT-5.1-Instant cost?

No official standard PAYG price is currently available for GPT-5.1-Instant. The lowest tracked third-party offer starts at $1.1 input and $9 output via Poe.

Who created GPT-5.1-Instant?

GPT-5.1-Instant was created by OpenAI.

What is the context window for GPT-5.1-Instant?

The default version has a 400K token context window.

Is GPT-5.1-Instant open weight?

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

How many API providers offer GPT-5.1-Instant?

1 provider offerings are linked to the default version.

What models should I compare GPT-5.1-Instant with?

Nearby ranked alternatives include Nemotron 3 Ultra, GPT-5.1, MiMo.