# Claude 1.3 vs GPT-5.5 Pro

> GPT-5.5 Pro has enough public results to be ranked (#7); Claude 1.3 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/claude-1-3-vs-gpt-5-5-pro
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Snapshot

| | Claude 1.3 | GPT-5.5 Pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | — | 64.3 |
| Rank | — | 7 |
| Context | — | 1.05M |
| Input $/M | — | $30 |
| Output $/M | — | $180 |
| Weights | Proprietary | Proprietary |

## Reasoning

- Claude 1.3: —
- GPT-5.5 Pro: 73.6 (#7)

| Benchmark | Claude 1.3 | GPT-5.5 Pro |
|---|---|---|
| ARC-AGI-2 | — | 84.6% |
| SimpleBench | — | 76.9% |
| ARC-AGI-1 | — | 96.5% |
| CritPt | — | 30.6% |
| Chess Puzzles | — | 64% |
| DTBench | — | 96% |
| LMCA | — | 53.9% |
| Epoch Capabilities Index | — | 162.45 |

## Math

- Claude 1.3: —
- GPT-5.5 Pro: 83.8 (#8)

| Benchmark | Claude 1.3 | GPT-5.5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 87.7% |
| FrontierMath Tier 4 | — | 78% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| FrontierMath (Feb 2025 set) | — | 52.4% |
| FrontierMath Tier 4 (v1) | — | 39.6% |

## Knowledge

- Claude 1.3: —
- GPT-5.5 Pro: 64.2 (#17)

| Benchmark | Claude 1.3 | GPT-5.5 Pro |
|---|---|---|
| GPQA Diamond | — | 93.9% |
| MMLU | 77% | — |
| TriviaQA | 86.7% | — |

## FAQ

### Is Claude 1.3 better than GPT-5.5 Pro?

GPT-5.5 Pro has enough public results to be ranked (#7); Claude 1.3 does not yet, so treat this comparison as directional.

### How many benchmarks do Claude 1.3 and GPT-5.5 Pro share?

0 benchmarks have published results for both models. Claude 1.3 has 2 scored results on Noometry and GPT-5.5 Pro has 14.