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OpenAI: GPT-5.1

by OpenAI

GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks. The model produces clearer, more grounded explanations with reduced jargon, making it easier to follow even on technical or multi-step problems. Built for broad task coverage, GPT-5.1 delivers consistent gains across math, coding, and structured analysis workloads, with more coherent long-form answers and improved tool-use reliability. It also features refined conversational alignment, enabling warmer, more intuitive responses without compromising precision. GPT-5.1 serves as the primary full-capability successor to GPT-5

Avg Score

90.3%

17 answers

Avg Latency

35.5s

14 runs

Pricing

$1.25

input

/

$10.00

output

per 1M tokens

Context

400K

tokens

Alternatives

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No alternatives found

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Other Models from OpenAI

Compare performance with other models from the same creator

ModelScoreLatencyCost/1M
OpenAI: o1-pro94.2%95.3s$375.00
OpenAI: GPT-5.1-Codex-Max93.5%25.2s$5.63
OpenAI: GPT-592.2%54.7s$5.63
OpenAI: GPT-5 Image90.9%49.2s$10.00
OpenAI: GPT-5.1 Chat90.6%6.1s$5.63
OpenAI: GPT-5.1-Codex90.6%16.6s$5.63
OpenAI: GPT-5.1-Codex-Mini90.6%12.6s$1.13
OpenAI: o390.3%19.0s$5.00
OpenAI: gpt-oss-120b90.0%28.3s$0.11
OpenAI: o4 Mini Deep Research89.7%134.5s$5.00
OpenAI: GPT-5 Pro89.4%332.1s$67.50
OpenAI: GPT-5 Image Mini89.3%31.8s$2.25
OpenAI: GPT-4o Search Preview89.3%11.2s$6.25
OpenAI: GPT-4.189.2%21.8s$5.00
OpenAI: gpt-oss-safeguard-20b88.4%2.3s$0.19
OpenAI: o188.3%24.1s$37.50
OpenAI: GPT-5.287.8%20.7s$7.88
OpenAI: o3 Pro87.6%125.7s$50.00
OpenAI: GPT-5.2-Codex87.2%21.7s$7.88
OpenAI: GPT-5 Codex87.2%20.5s$5.63
OpenAI: GPT-5.2 Pro86.9%47.7s$94.50
OpenAI: o3 Deep Research86.5%362.7s$25.00
OpenAI: GPT-5.2 Chat86.4%9.5s$7.88
OpenAI: GPT-5 Chat86.2%6.8s$5.63
OpenAI: o4 Mini High86.1%26.8s$2.75
OpenAI: o3 Mini High86.1%13.8s$2.75
OpenAI: o4 Mini85.3%18.2s$2.75
OpenAI: o3 Mini85.3%16.0s$2.75
OpenAI: ChatGPT-4o82.9%7.4s$10.00
OpenAI: GPT-5 Mini82.5%24.7s$1.13
OpenAI: GPT-5 Nano77.1%34.2s$0.22
OpenAI: GPT-4o (2024-05-13)76.5%4.7s$10.00
OpenAI: GPT-4o76.1%5.8s$12.00
OpenAI: GPT-4o (2024-11-20)75.6%13.0s$6.25
OpenAI: GPT-4o73.8%12.5s$6.25
OpenAI: gpt-oss-20b72.8%13.3s$0.06
OpenAI: GPT-4.1 Mini71.9%13.2s$1.00
OpenAI: GPT-3.5 Turbo (older v0613)70.8%13.7s$1.50
OpenAI: GPT-4o-mini (2024-07-18)70.3%13.2s$0.38
OpenAI: GPT-4o (2024-08-06)70.0%9.5s$6.25
OpenAI: gpt-oss-120b69.6%29.0s$0.11
OpenAI: GPT-4o-mini67.4%11.5s$0.38
OpenAI: GPT-4o-mini Search Preview66.2%6.5s$0.38
OpenAI: GPT-4 Turbo (older v1106)64.7%18.1s$20.00
OpenAI: GPT-4 Turbo Preview62.6%15.8s$20.00
OpenAI: GPT-461.7%12.1s$45.00
OpenAI: GPT-4 Turbo61.5%26.5s$20.00
OpenAI: GPT-4 (older v0314)59.7%16.8s$45.00
OpenAI: GPT-4.1 Nano59.2%5.3s$0.25
OpenAI: GPT-3.5 Turbo 16k48.2%4.2s$3.50
OpenAI: GPT-3.5 Turbo42.9%4.0s$1.00
OpenAI: GPT-3.5 Turbo Instruct27.5%4.4s$1.75
OpenAI: GPT-4o Audio——$6.25
OpenAI: gpt-oss-120b——Free
OpenAI: gpt-oss-20b——Free
OpenAI: GPT Audio——$6.25
OpenAI: GPT Audio Mini——$1.50
OpenAI: Codex Mini——$3.75

Benchmark Performance

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Price vs Performance

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Score Over Time

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Benchmark Activity

Number of benchmark runs over time

Quickstart

Get started with this model using OpenRouter

View on OpenRouter
import { OpenRouter } from "@openrouter/sdk";

const openrouter = new OpenRouter({
  apiKey: "<OPENROUTER_API_KEY>"
});

const completion = await openrouter.chat.completions.create({
  model: "openai/gpt-5.1",
  messages: [
    {
      role: "user",
      content: "Hello!"
    }
  ]
});

console.log(completion.choices[0].message.content);

Get your API key at openrouter.ai/keys