GPT-5.1 by OpenAI demonstrates top-tier general intelligence, excellent coding ability, outstanding mathematical reasoning. View detailed benchmark data including scores across coding, math, reasoning, speed, and cost metrics.
Specifications last checked against the provider on . Benchmark scores carry their own source, linked beside each number.
General Benchmarks
Massive Multitask Language Understanding professional benchmark
HuggingFace LeaderboardHuman preference ELO from blind head-to-head votes
LMSYS / HuggingFaceCoding Benchmarks
Human preference ELO for building a working web page from a brief
Design Arena (via OpenRouter)Artificial Analysis composite coding score
Artificial Analysis (via OpenRouter)Human preference ELO for building things — websites, UI, games, charts, SVG
Design Arena (via OpenRouter)Math Benchmarks
Reasoning Benchmarks
Multi-turn service agent making tool calls under strict policy constraints
OpenRouter (measured)Speed Benchmarks
Cost Benchmarks
Cost per 1M cached input tokens — the price that actually applies to a long agent conversation
OpenRouter APIContext Benchmarks
Available from 30 providers
The same model costs different amounts depending on who serves it. You can bring your own key for 3 of these — connect it here.
| Provider | Input / 1M | Output / 1M | Cached in | Context | Your key |
|---|---|---|---|---|---|
| OpenCode Zen | $1.07 | $8.5 | $0.107 | 400K | — |
| Poe | $1.1 | $9 | $0.11 | 400K | — |
| Jiekou.AI | $1.125 | $9 | — | 400K | — |
| 302.AI | $1.25 | $10 | — | 400K | — |
| Abacus | $1.25 | $10 | $0.125 | 400K | — |
| AIHubMix | $1.25 | $10 | $0.13 | 400K | — |
| Azure | $1.25 | $10 | $0.125 | 400K | Supported |
| Azure Cognitive Services | $1.25 | $10 | $0.125 | 400K | — |
| Cloudflare AI Gateway | $1.25 | $10 | $0.125 | 128K | — |
| Databricks | $1.25 | $10 | $0.125 | 400K | — |
| DevPass (LLM Gateway) | $1.25 | $10 | $0.125 | 400K | — |
| Eden AI | $1.25 | $10 | $0.125 | 400K | — |
| Impossibl | $1.25 | $10 | $0.125 | 400K | — |
| Kilo Gateway | $1.25 | $10 | $0.125 | 400K | — |
| LLM Gateway | $1.25 | $10 | $0.125 | 400K | — |
| Merge Gateway | $1.25 | $10 | $0.125 | 400K | — |
| NanoGPT | $1.25 | $10 | $0.125 | 400K | — |
| NEAR AI Cloud | $1.25 | $10 | $0.125 | 400K | — |
| Neon | $1.25 | $10 | $0.125 | 400K | — |
| Ofox | $1.25 | $10 | $0.13 | 400K | — |
| OpenAI | $1.25 | $10 | $0.125 | 400K | Supported |
| OpenRouter | $1.25 | $10 | $0.125 | 400K | Supported |
| OrcaRouter | $1.25 | $10 | $0.125 | 400K | — |
| Perplexity Agent | $1.25 | $10 | $0.125 | 400K | — |
| Pioneer | $1.25 | $10 | $0.125 | 400K | — |
| ZenMux | $1.25 | $10 | $0.12 | 400K | — |
| Cortecs | $1.375 | $10.96 | $0.156 | 400K | — |
| Requesty | $1.375 | $11 | $0.1375 | 400K | — |
| AnyAPI | — | — | — | 400K | — |
| Snowflake Cortex | — | — | — | 400K | — |
GPT-5.1 — Benchmark Scores Overview
Scores normalized to percentage scale for visual comparison. ELO scores mapped to 0-100 range (1100-1500).
Compare GPT-5.1 With
GPT-5.1 — Frequently Asked Questions
How intelligent is GPT-5.1?
GPT-5.1 scores 1464 on the Chatbot Arena ELO rating, making it one of the top-ranked AI model. This score is based on blind head-to-head human preference voting.
How much does GPT-5.1 cost?
GPT-5.1 costs $1.3 per 1M input tokens and $10.0 per 1M output tokens. This is mid-range pricing for its capability level.
How fast is GPT-5.1?
GPT-5.1 generates output at 95 tokens per second, which is moderate compared to other models. The time to first token is 350 ms.
How good is GPT-5.1 at coding?
GPT-5.1 achieves 76.3% on SWE-bench Verified, demonstrating excellent real-world software engineering capability. This benchmark tests the model's ability to resolve actual GitHub issues.
How good is GPT-5.1 at math and reasoning?
GPT-5.1 scores 95.0% on the MATH benchmark (competition-level mathematics). It also achieves 86.2% on GPQA Diamond, a graduate-level science reasoning benchmark.
What is the context window of GPT-5.1?
GPT-5.1 has a context window of 400K tokens. This determines how much text, conversation history, and code the model can process in a single request.
Who created GPT-5.1?
GPT-5.1 was created by OpenAI. It is classified as a flagship model in our catalogue.
Is GPT-5.1 open source?
No, GPT-5.1 is a proprietary model. It is available through OpenAI's API and compatible providers.