# Claude 1.3 vs Claude 2.1

> Claude 2.1 has enough public results to be ranked (#340); Claude 1.3 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/claude-1-3-vs-claude-2-1
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both.

## Snapshot

| | Claude 1.3 | Claude 2.1 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | — | 24.9 |
| Rank | — | 340 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 1.3: —
- Claude 2.1: 25.8 (#322)

| Benchmark | Claude 1.3 | Claude 2.1 |
|---|---|---|
| WeirdML | — | 7.1% |

## Reasoning

- Claude 1.3: —
- Claude 2.1: 20.6 (#216)

| Benchmark | Claude 1.3 | Claude 2.1 |
|---|---|---|
| DTBench | — | 51% |
| Epoch Capabilities Index | — | 119.22 |
| ForecastBench | — | 54.2 |

## Math

- Claude 1.3: —
- Claude 2.1: 9.6 (#309)

| Benchmark | Claude 1.3 | Claude 2.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 1.9% |

## Knowledge

- Claude 1.3: —
- Claude 2.1: 15.5 (#287)

| Benchmark | Claude 1.3 | Claude 2.1 |
|---|---|---|
| MMLU | 77% | 73.5% |
| GPQA Diamond | — | 33% |
| TriviaQA | 86.7% | — |

## FAQ

### Is Claude 1.3 better than Claude 2.1?

Claude 2.1 has enough public results to be ranked (#340); Claude 1.3 does not yet, so treat this comparison as directional.

### How many benchmarks do Claude 1.3 and Claude 2.1 share?

1 benchmark has published results for both models. Claude 1.3 has 2 scored results on Noometry and Claude 2.1 has 7.