GPT-5.1vsClaude Sonnet 4.5
Across 15 shared benchmarks, GPT-5.1 leads overall: GPT-5.1 wins 10, Claude Sonnet 4.5 wins 5, with 0 ties and an average score difference of +5.58.
GPT-5.1
OpenAI · 2025-11-12 · Reasoning model
Claude Sonnet 4.5
Anthropic · 2025-09-30 · Chat model
GPT-5.110 wins(67%)(33%)5 winsClaude Sonnet 4.5
Benchmark scores
Grouped by capability, sorted by largest gap within each. 15 shared benchmarks.
General Knowledge
GPT-5.1 3/4| Benchmark | GPT-5.1 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| ARC-AGI | 72.8025 / 65 | 63.7032 / 65 | +9.10 |
| HLE | 26.5083 / 157 | 33.6067 / 157 | -7.10 |
| GPQA Diamond | 88.1028 / 178 | 83.4058 / 178 | +4.70 |
| ARC-AGI-2 | 17.6033 / 59 | 13.6035 / 59 | +4 |
Math and Reasoning
Even 4/4| Benchmark | GPT-5.1 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| FrontierMath | 26.7013 / 60Thinking High (With Tools) | 5.2038 / 60 | +21.50 |
| FrontierMath - Tier 4 | 12.5029 / 80Thinking High (With Tools) | 2.1056 / 80Normal (No Tools) | +10.40 |
| AIME2025 | 9428 / 106 | 1001 / 106 | -6 |
| Simple Bench | 53.2010 / 27 | 54.309 / 27 | -1.10 |
Agent Level Benchmark
Even 2/2| Benchmark | GPT-5.1 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| Terminal Bench Hard | 432 / 13Thinking High (With Tools) | 338 / 13 | +10 |
| τ²-Bench - Telecom | 95.6014 / 35Thinking High (With Tools) | 985 / 35 | -2.40 |
Coding and Software Engineer
Even 2/2| Benchmark | GPT-5.1 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| SWE-Bench Pro - Public | 50.8030 / 43Thinking High (No Tools) | 43.6036 / 43 | +7.20 |
| SWE-bench Verified | 76.3030 / 108 | 826 / 108 | -5.70 |
AI Agent - Information Search
GPT-5.1 1/1| Benchmark | GPT-5.1 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| BrowseComp | 50.8036 / 45Thinking High (No Tools) | 24.1043 / 45 | +26.70 |
AI Agent - Tool Usage
GPT-5.1 1/1| Benchmark | GPT-5.1 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| Terminal Bench 2.0 | 47.6037 / 46Thinking High (With Tools) | 42.8041 / 46 | +4.80 |
Multimodal Understanding
GPT-5.1 1/1| Benchmark | GPT-5.1 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| MMMU | 85.402 / 28 | 77.8014 / 28 | +7.60 |
Specs
| Field | GPT-5.1 | Claude Sonnet 4.5 |
|---|---|---|
| Publisher | OpenAI | Anthropic |
| Release date | 2025-11-12 | 2025-09-30 |
| Model type | Reasoning model | Chat model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 400K | 1000K |
| Max output | 128K | 64K |
Summary
- GPT-5.1leads in:General Knowledge (3/4), AI Agent - Information Search (1/1), AI Agent - Tool Usage (1/1), Multimodal Understanding (1/1)
- Tied in:Math and Reasoning, Agent Level Benchmark, Coding and Software Engineer
On average across the 15 shared benchmarks, GPT-5.1 scores 5.58 higher.
Largest single-benchmark gap: BrowseComp — GPT-5.1 50.80 vs Claude Sonnet 4.5 24.10 (+26.70).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.