Model comparison
Claude 2 vs GPT-5.3 Chat
GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 24.7 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where GPT-5.3 Chat leads 35.4 to 8.7.
Side by side
| Claude 2 | GPT-5.3 Chat | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 24.7 | 42.1 |
| Released | 2023-07-11 | 2026-03-03 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 16K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 8 | 18 |
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Category by category
Coding Not comparable
Claude 2: —, GPT-5.3 Chat: 40.8 (#124)
| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | — | 1408 |
| HumanEval+ | 61.6% | — |
Reasoning GPT-5.3 Chat leads
Claude 2: 20.8 (#213), GPT-5.3 Chat: 27.3 (#105)
| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | — | 1399 |
| DTBench | 51.9% | — |
| Epoch Capabilities Index | 120.08 | — |
Math GPT-5.3 Chat leads
Claude 2: 8.7 (#314), GPT-5.3 Chat: 35.4 (#146)
| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | — |
| LMArena Math | — | 1389 |
| MATH Level 5 | 11.7% | — |
Knowledge GPT-5.3 Chat leads
Claude 2: 17.0 (#282), GPT-5.3 Chat: 38.2 (#137)
| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| GPQA Diamond | 34.7% | — |
| LMArena Expert | — | 1397 |
| MMLU | 78.5% | — |
| TriviaQA | 87.5% | — |
Multilingual Not comparable
Claude 2: —, GPT-5.3 Chat: 50.5 (#119)
| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | — | 1383 |
| LMArena Chinese | — | 1433 |
| LMArena French | — | 1398 |
| LMArena German | — | 1384 |
| LMArena Japanese | — | 1351 |
| LMArena Korean | — | 1347 |
| LMArena Russian | — | 1400 |
| LMArena Spanish | — | 1371 |
Instruction Following Not comparable
Claude 2: —, GPT-5.3 Chat: 73.0 (#124)
| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | — | 1378 |
Long Context Not comparable
Claude 2: —, GPT-5.3 Chat: 42.6 (#115)
| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | — | 1396 |
Writing & Preference Not comparable
Claude 2: —, GPT-5.3 Chat: 63.3 (#65)
| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | — | 1389 |
| LMArena Creative Writing | — | 1356 |
| EQ-Bench Creative Writing | — | 1690 |
| LMArena Multi-Turn | — | 1413 |
Frequently asked questions
Is Claude 2 better than GPT-5.3 Chat?
GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 24.7 on the Noometry Index.
How many benchmarks do Claude 2 and GPT-5.3 Chat share?
0 benchmarks have published results for both models. Claude 2 has 8 scored results on Noometry and GPT-5.3 Chat has 18.