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 17, 2026. Default version: GPT-5.1 Instant
LLMBoard Score61.1GPT-5.1 Instant
Coverage60%9 benchmark families
Context window400KTokens
Official input priceN/AOfficial price unavailable
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 Benchmark Results
Benchmark scores for GPT-5.1 Instant.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkMMMU | Score85.4% | Rank03 | Participants63 | Percentile96.8% | EvidenceC | Evaluated |
| BenchmarkBrowseComp Long Context 128k | Score90.0% | Rank04 | Participants5 | Percentile25.0% | EvidenceC | Evaluated |
| BenchmarkTau2 Airline | Score67.0% | Rank05 | Participants23 | Percentile81.8% | EvidenceC | Evaluated |
| BenchmarkFrontierMath | Score26.7% | Rank09 | Participants17 | Percentile50.0% | EvidenceC | Evaluated |
| BenchmarkTau2 Retail | Score77.9% | Rank11 | Participants26 | Percentile60.0% | EvidenceC | Evaluated |
| BenchmarkTau2 Telecom | Score95.6% | Rank11 | Participants35 | Percentile70.6% | EvidenceC | Evaluated |
| BenchmarkAIME 2025 | Score94.0% | Rank26 | Participants115 | Percentile78.1% | EvidenceC | Evaluated |
| BenchmarkSWE-Bench Verified | Score76.3% | Rank33 | Participants111 | Percentile70.9% | EvidenceC | Evaluated |
| BenchmarkGPQA | Score88.1% | Rank37 | Participants239 | Percentile84.9% | EvidenceC | Evaluated |
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 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
Sort by
Provider | Provider model ID | Region | Input / 1M | Output / 1M | Context | Updated |
|---|
| ProviderPoe | Provider model IDopenai/gpt-5.1-instant | Regionglobal | Input / 1M$1.1 | Output / 1M$9 | Context128K | Updated |
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 Runtime Performance
Provider-specific output speed and catalog latency for GPT-5.1 Instant. Runtime does not affect the capability score.
Sort by
Provider | Output Speed | Catalog Latency | Max Input | Max Output | Updated |
|---|
| ProviderOpenAI | Output Speed100 tok/s | Catalog Latency2 s | Max Input400K | Max Output128K | Updated |
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
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 Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionGPT-5.1 Instant | Released | LLMBoard61.1 | ParametersN/A | Context400K | Max output128K | Open weightsNo | LicenseProprietary |
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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 2026-08-17.
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.