Model comparison
Claude 2.1 vs GPT-4.5
GPT-4.5 is the stronger model overall, scoring 37.2 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 1 category and GPT-4.5 in 3 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-4.5 leads 32.6 to 10.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.9% for Claude 2.1 and 37.8% for GPT-4.5.
Side by side
| Claude 2.1 | GPT-4.5 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 25.2 | 37.2 |
| Released | 2023-11-21 | 2025-02-27 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 7 | 42 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-4.5 leads
Claude 2.1: 26.2 (#327), GPT-4.5: 42.2 (#109)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| WeirdML | 7.1% | 39.4% |
| Aider Polyglot | — | 44.9% |
| LiveBench Coding | — | 75.2% |
| LMArena Coding | — | 1396 |
Agentic & Tool Use Not comparable
Claude 2.1: —, GPT-4.5: 27.9 (#97)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| Cybench | — | 17.5% |
Reasoning Claude 2.1 leads
Claude 2.1: 21.4 (#221), GPT-4.5: 13.9 (#330)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| Epoch Capabilities Index | 119.27 | 136.74 |
| ForecastBench | 54.2 | 61.7 |
| ARC-AGI-2 | — | 0.8% |
| SimpleBench | — | 34.5% |
| ARC-AGI-1 | — | 10.3% |
| EnigmaEval | — | 3.2% |
| LiveBench Reasoning | — | 71.1% |
| LMArena Hard Prompts | — | 1403 |
| DTBench | 51% | — |
| LiveBench Data Analysis | — | 64.3% |
| LiveBench | — | 69% |
Math GPT-4.5 leads
Claude 2.1: 10.2 (#315), GPT-4.5: 32.6 (#211)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 37.8% |
| LiveBench Math | — | 69.3% |
| LMArena Math | — | 1412 |
| MATH Level 5 | — | 78.6% |
Knowledge GPT-4.5 leads
Claude 2.1: 15.4 (#292), GPT-4.5: 32.5 (#211)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| GPQA Diamond | 33% | 68.7% |
| Humanity's Last Exam | — | 5.4% |
| Confabulations | — | 13.6% |
| LMArena Expert | — | 1394 |
| MMLU | 73.5% | — |
Multimodal Not comparable
Claude 2.1: —, GPT-4.5: 37.6 (#71)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| LMArena Vision | — | 1195 |
| VPCT | — | 45% |
Multilingual Not comparable
Claude 2.1: —, GPT-4.5: 52.5 (#83)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| LMArena Non-English | — | 1413 |
| LMArena Chinese | — | 1421 |
| LMArena French | — | 1418 |
| LMArena German | — | 1457 |
| LMArena Japanese | — | 1416 |
| LMArena Korean | — | 1392 |
| LMArena Russian | — | 1419 |
Instruction Following Not comparable
Claude 2.1: —, GPT-4.5: 72.6 (#134)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| LiveBench Instruction Following | — | 72.3% |
| LMArena Instruction Following | — | 1404 |
Long Context Not comparable
Claude 2.1: —, GPT-4.5: 40.4 (#155)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| Fiction.LiveBench | — | 63.9% |
| LMArena Longer Query | — | 1406 |
Writing & Preference Not comparable
Claude 2.1: —, GPT-4.5: 56.9 (#134)
| Benchmark | Claude 2.1 | GPT-4.5 |
|---|---|---|
| LMArena Text | — | 1417 |
| LMArena Creative Writing | — | 1394 |
| Short-Story Creative Writing | — | 75.6% |
| EQ-Bench Creative Writing | — | 1258 |
| LMArena Multi-Turn | — | 1444 |
| LiveBench Language | — | 61.5% |
Frequently asked questions
Is Claude 2.1 better than GPT-4.5?
GPT-4.5 is the stronger model overall, scoring 37.2 to 25.2 on the Noometry Index.
Is Claude 2.1 or GPT-4.5 better for coding?
GPT-4.5 scores higher on coding benchmarks: 42.2 versus 26.2 in the Noometry coding category.
How many benchmarks do Claude 2.1 and GPT-4.5 share?
5 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and GPT-4.5 has 42.