# Claude 2 vs GPT-5.3 Chat

> GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 25.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-vs-gpt-5-3-chat
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where GPT-5.3 Chat leads 38.2 to 9.3.

## Snapshot

| | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 25.0 | 42.8 |
| Rank | 346 | 109 |
| Context | — | 128K |
| Input $/M | — | $1.75 |
| Output $/M | — | $14 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 2: —
- GPT-5.3 Chat: 41.4 (#124)

| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | — | 1408 |
| HumanEval+ | 61.6% | — |

## Reasoning

- Claude 2: 21.7 (#216)
- GPT-5.3 Chat: 28.5 (#102)

| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | — | 1399 |
| DTBench | 51.9% | — |
| Epoch Capabilities Index | 120.13 | — |

## Math

- Claude 2: 9.3 (#320)
- GPT-5.3 Chat: 38.2 (#142)

| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | — |
| LMArena Math | — | 1389 |
| MATH Level 5 | 11.7% | — |

## Knowledge

- Claude 2: 16.9 (#287)
- GPT-5.3 Chat: 38.8 (#140)

| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| GPQA Diamond | 34.7% | — |
| LMArena Expert | — | 1397 |
| MMLU | 78.5% | — |
| TriviaQA | 87.5% | — |

## Multilingual

- Claude 2: —
- GPT-5.3 Chat: 50.3 (#124)

| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | — | 1382 |
| LMArena Chinese | — | 1432 |
| LMArena French | — | 1397 |
| LMArena German | — | 1384 |
| LMArena Japanese | — | 1352 |
| LMArena Korean | — | 1346 |
| LMArena Russian | — | 1400 |
| LMArena Spanish | — | 1371 |

## Instruction Following

- Claude 2: —
- GPT-5.3 Chat: 72.8 (#129)

| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | — | 1378 |

## Long Context

- Claude 2: —
- GPT-5.3 Chat: 42.6 (#120)

| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | — | 1396 |

## Writing & Preference

- Claude 2: —
- GPT-5.3 Chat: 63.1 (#68)

| Benchmark | Claude 2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | — | 1389 |
| LMArena Creative Writing | — | 1355 |
| EQ-Bench Creative Writing | — | 1690 |
| LMArena Multi-Turn | — | 1412 |

## FAQ

### Is Claude 2 better than GPT-5.3 Chat?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 25.0 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.