GPT-5.1

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...

by OpenAI

Overview

Quick stats across all benchmark runs.

Score

—

15 benchmarks

Avg Latency

30.5s

20 requests

Pricing

$1.25 in / $10.00 out

per 1M tokens

Context

400K

tokens

Alternatives

Models with similar or better quality but different tradeoffs

Same Quality, Cheaper

Models with similar or better performance at a lower cost per token.

Model	Cost
GPT-5 Nano	-61%

Same Quality, Faster

Models with similar or better performance but lower latency.

Model	Latency
GPT-5.2	-24%

Same Cost, Better

Models at a similar price point with higher benchmark scores.

Model	Score
GPT-5.2	+3%

Benchmark Performance

How this model performs across different benchmarks

Benchmark	Score	Rank
Money Boy Cultural Literacy Test	52%	33 / 107

Price vs Performance

Compare cost efficiency across all models

Current model (baseline)

Other models (relative score)

Y-axis shows score difference from shared benchmarks. X-axis uses log scale.

Score Over Time

Performance trends across all benchmark runs

Benchmark Activity

Number of benchmark runs over time

Quickstart

View on OpenRouter

Get started with this model using 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

Other Models from OpenAI

Compare performance with other models from the same creator

Model	Latency	Cost/1M	Score
GPT-5.5	4.9s	$17.50	100%
GPT-5.5 Pro	28.9s	$105.00	77%
GPT-5.2	20.7s	$7.88	69%
GPT-5.3 Chat	2.5s	$7.88	65%
GPT-5.4 Mini	1.2s	$2.63	57%
GPT-5 Mini	24.2s	$1.13	57%
GPT-5.4	1.8s	$8.75	49%
gpt-oss-20b	13.6s	$0.09	41%
gpt-oss-120b	28.7s	$0.11	34%
GPT-5 Nano	33.8s	$0.22	30%
GPT-5.4 Nano	—	$0.73	—
GPT-5.4 Pro	—	$105.00	—
GPT-5.3-Codex	2.7s	$7.88	—
GPT Audio	—	$6.25	—
GPT Audio Mini	—	$1.50	—
GPT-5.2-Codex	21.7s	$7.88	—
GPT-5.2 Chat	9.5s	$7.88	—
GPT-5.2 Pro	47.7s	$94.50	—
GPT-5.1-Codex-Max	25.2s	$5.63	—
GPT-5.1 Chat	5.5s	$5.63	—
GPT-5.1-Codex	16.6s	$5.63	—
GPT-5.1-Codex-Mini	12.6s	$1.13	—
gpt-oss-safeguard-20b	2.4s	$0.19	—
GPT-5 Image Mini	31.8s	$2.25	—
GPT-5 Image	49.2s	$10.00	—
o3 Deep Research	362.7s	$25.00	—
o4 Mini Deep Research	151.0s	$5.00	—
GPT-5 Pro	332.1s	$67.50	—
GPT-5 Codex	19.7s	$5.63	—
GPT-4o Audio	—	$6.25	—
GPT-5 Chat	5.9s	$5.63	—
GPT-5	58.6s	$5.63	—
o3 Pro	122.5s	$50.00	—
o4 Mini High	26.8s	$2.75	—
o3	19.0s	$5.00	—
o4 Mini	18.2s	$2.75	—
GPT-4.1	20.7s	$5.00	—
GPT-4.1 Mini	11.5s	$1.00	—
GPT-4.1 Nano	4.5s	$0.25	—
o1-pro	95.3s	$375.00	—
o3 Mini High	13.8s	$2.75	—
o3 Mini	16.0s	$2.75	—
o1	23.4s	$37.50	—
GPT-4o (2024-11-20)	12.4s	$6.25	—
GPT-4o (2024-08-06)	9.5s	$6.25	—
GPT-4o	5.8s	$12.00	—
GPT-4o (2024-05-13)	4.7s	$10.00	—
GPT-4o-mini Search Preview	6.5s	$0.38	—
GPT-4o Search Preview	11.2s	$6.25	—
GPT-4 Turbo	26.5s	$20.00	—
GPT-4 Turbo Preview	15.8s	$20.00	—
GPT-3.5 Turbo 16k	4.0s	$3.50	—
GPT-4	12.1s	$45.00	—
Codex Mini	—	$3.75	—
ChatGPT-4o	7.4s	$10.00	—
GPT-3.5 Turbo (older v0613)	13.7s	$1.50	—
GPT-4 Turbo (older v1106)	18.1s	$20.00	—
GPT-3.5 Turbo Instruct	4.4s	$1.75	—
GPT-4 (older v0314)	16.8s	$45.00	—
GPT-3.5 Turbo	3.8s	$1.00	—
GPT Chat Latest	—	$17.50	—
GPT-5.4 Image 2	41.3s	$11.50	—
GPT-4o-mini	11.0s	$0.38	—
GPT-4o-mini (2024-07-18)	13.2s	$0.38	—