Model comparison
Claude 2.1 vs GPT-5 Pro
GPT-5 Pro is the stronger model overall, scoring 46.4 to 25.2 on the Noometry Index.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. Claude 2.1 scores higher in 0 categories and GPT-5 Pro in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5 Pro leads 56.7 to 15.4.
- The biggest single-benchmark swing is WeirdML: 7.1% for Claude 2.1 and 60.4% for GPT-5 Pro.
Side by side
| Claude 2.1 | GPT-5 Pro | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 25.2 | 46.4 |
| Released | 2023-11-21 | 2025-10-06 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 272K |
| Input $ / M tokens | — | $15 |
| Output $ / M tokens | — | $120 |
| Results tracked | 7 | 12 |
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Category by category
Coding GPT-5 Pro leads
Claude 2.1: 26.2 (#327), GPT-5 Pro: 44.0 (#80)
Reasoning GPT-5 Pro leads
Claude 2.1: 21.4 (#221), GPT-5 Pro: 38.9 (#62)
| Benchmark | Claude 2.1 | GPT-5 Pro |
|---|---|---|
| Epoch Capabilities Index | 119.27 | 150.28 |
| ARC-AGI-2 | — | 18.3% |
| SimpleBench | — | 61.6% |
| Kagi LLM Benchmark | — | 76.8% |
| ARC-AGI-1 | — | 70.2% |
| EnigmaEval | — | 18.8% |
| DTBench | 51% | — |
| ForecastBench | 54.2 | — |
Math GPT-5 Pro leads
Claude 2.1: 10.2 (#315), GPT-5 Pro: 48.5 (#63)
| Benchmark | Claude 2.1 | GPT-5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 55.8% |
| FrontierMath Tier 4 | — | 19.5% |
| OTIS Mock AIME 2024-2025 | 1.9% | — |
| FrontierMath Tier 4 (v1) | — | 14.6% |
Knowledge GPT-5 Pro leads
Claude 2.1: 15.4 (#292), GPT-5 Pro: 56.7 (#42)
| Benchmark | Claude 2.1 | GPT-5 Pro |
|---|---|---|
| GPQA Diamond | 33% | — |
| Humanity's Last Exam | — | 31.6% |
| MMLU | 73.5% | — |
Frequently asked questions
Is Claude 2.1 better than GPT-5 Pro?
GPT-5 Pro is the stronger model overall, scoring 46.4 to 25.2 on the Noometry Index.
Is Claude 2.1 or GPT-5 Pro better for coding?
GPT-5 Pro scores higher on coding benchmarks: 44.0 versus 26.2 in the Noometry coding category.
How many benchmarks do Claude 2.1 and GPT-5 Pro share?
2 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and GPT-5 Pro has 12.