Model comparison
Claude 2.1 vs GPT-4.1 nano
GPT-4.1 nano is the stronger model overall, scoring 27.9 to 25.2 on the Noometry Index.
Last verified . 5 shared benchmarks.
Summary
- They share 5 benchmarks with published results for both. Claude 2.1 scores higher in 2 categories and GPT-4.1 nano in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-4.1 nano leads 26.9 to 10.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.9% for Claude 2.1 and 28.9% for GPT-4.1 nano.
Side by side
| Claude 2.1 | GPT-4.1 nano | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 25.2 | 27.9 |
| Released | 2023-11-21 | 2025-04-14 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 33K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.40 |
| Results tracked | 7 | 38 |
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Category by category
Coding Claude 2.1 leads
Claude 2.1: 26.2 (#327), GPT-4.1 nano: 24.1 (#330)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| WeirdML | 7.1% | 19% |
| Aider Polyglot | — | 8.9% |
| SciCode | — | 25.9% |
| LMArena Coding | — | 1306 |
Agentic & Tool Use Not comparable
Claude 2.1: —, GPT-4.1 nano: 26.5 (#104)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 33% |
Reasoning Claude 2.1 leads
Claude 2.1: 21.4 (#221), GPT-4.1 nano: 8.5 (#349)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| DTBench | 51% | 52.5% |
| Epoch Capabilities Index | 119.27 | 129.62 |
| ARC-AGI-2 | — | 0% |
| Kagi LLM Benchmark | — | 33.3% |
| ARC-AGI-1 | — | 0% |
| CritPt | — | 0% |
| LMArena Hard Prompts | — | 1286 |
| LMCA | — | 5.5% |
| ForecastBench | 54.2 | — |
Math GPT-4.1 nano leads
Claude 2.1: 10.2 (#315), GPT-4.1 nano: 26.9 (#252)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 28.9% |
| Omni-MATH | — | 36.7% |
| LMArena Math | — | 1274 |
| MATH Level 5 | — | 70% |
| FrontierMath (Feb 2025 set) | — | 1% |
Knowledge GPT-4.1 nano leads
Claude 2.1: 15.4 (#292), GPT-4.1 nano: 21.8 (#273)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| GPQA Diamond | 33% | 48.9% |
| SimpleQA Verified | — | 6% |
| MMLU-Pro | — | 55% |
| GPQA (HELM) | — | 50.7% |
| LMArena Expert | — | 1272 |
| MMLU | 73.5% | — |
Multimodal Not comparable
Claude 2.1: —, GPT-4.1 nano: 29.2 (#113)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| LMArena Vision | — | 1063 |
Multilingual Not comparable
Claude 2.1: —, GPT-4.1 nano: 41.6 (#205)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| LMArena Non-English | — | 1260 |
| LMArena Chinese | — | 1270 |
| LMArena German | — | 1288 |
| LMArena Japanese | — | 1198 |
| LMArena Russian | — | 1261 |
Instruction Following Not comparable
Claude 2.1: —, GPT-4.1 nano: 67.8 (#193)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| IFEval | — | 84.3% |
| LMArena Instruction Following | — | 1267 |
Long Context Not comparable
Claude 2.1: —, GPT-4.1 nano: 23.7 (#296)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| Fiction.LiveBench | — | 25% |
| LMArena Longer Query | — | 1283 |
Writing & Preference Not comparable
Claude 2.1: —, GPT-4.1 nano: 40.5 (#243)
| Benchmark | Claude 2.1 | GPT-4.1 nano |
|---|---|---|
| LMArena Text | — | 1285 |
| LMArena Creative Writing | — | 1260 |
| EQ-Bench Creative Writing | — | 946 |
| WildBench | — | 81.2% |
| LMArena Multi-Turn | — | 1277 |
Frequently asked questions
Is Claude 2.1 better than GPT-4.1 nano?
GPT-4.1 nano is the stronger model overall, scoring 27.9 to 25.2 on the Noometry Index.
Is Claude 2.1 or GPT-4.1 nano better for coding?
Claude 2.1 scores higher on coding benchmarks: 26.2 versus 24.1 in the Noometry coding category.
How many benchmarks do Claude 2.1 and GPT-4.1 nano share?
5 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and GPT-4.1 nano has 38.