OpenAI model product
GPT-5.1-Instant
1-Instant is an OpenAI large language model designed for more conversational interactions, improved instruction following, adaptive reasoning, and coding tasks.
Updated Sep 8, 2026. Default version: GPT-5.1 Instant
LLMBoard Score60.7GPT-5.1 Instant
Coverage20%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 |
|---|
| BenchmarkBrowseComp Long Context 128k | Score90.00% | Rank03 | Participants5 | Percentile50.00% | EvidenceC | Evaluated |
| BenchmarkMMMU | Score85.40% | Rank03 | Participants64 | Percentile96.83% | EvidenceC | Evaluated |
| BenchmarkTau2 Airline | Score67.00% | Rank05 | Participants24 | Percentile82.61% | EvidenceC | Evaluated |
| BenchmarkFrontierMath | Score26.70% | Rank09 | Participants17 | Percentile50.00% | EvidenceC | Evaluated |
| BenchmarkTau2 Telecom | Score95.60% | Rank11 | Participants36 | Percentile71.43% | EvidenceC | Evaluated |
| BenchmarkTau2 Retail | Score77.90% | Rank12 | Participants27 | Percentile57.69% | EvidenceC | Evaluated |
| BenchmarkAIME 2025 | Score94.00% | Rank26 | Participants119 | Percentile78.81% | EvidenceC | Evaluated |
| BenchmarkSWE-Bench Verified | Score76.30% | Rank33 | Participants113 | Percentile71.43% | EvidenceC | Evaluated |
| BenchmarkGPQA | Score88.10% | Rank40 | Participants247 | Percentile84.15% | 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 Speed100.00 tok/s | Catalog Latency2.00 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 | LLMBoard60.72 | ParametersN/A | Context400K | Max output128K | Open weightsNo | LicenseProprietary |
Models similar to GPT-5.1-Instant
Recommendations prioritize the same model type and family, then the closest LLMBoard score.
OP
GPT-5.1
OpenAI
OP
GPT-5.3-Codex
OpenAI
OP
GPT-5.4-mini
OpenAI
OP
GPT-5.2-Codex
OpenAI
OP
GPT-5.5-Instant
OpenAI
OP
o3
OpenAI
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, with adaptive reasoning that determines when to think before responding. It is designed to provide clearer interactions and has improvements for coding tasks.
Data as of 2026-09-08.
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.