# Claude 2 vs Step 3.5 Flash

> Step 3.5 Flash is the stronger model overall, scoring 41.7 to 24.7 on the Noometry Index.

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

## Summary

- The widest gap is in math, where Step 3.5 Flash leads 40.6 to 8.7.
- Step 3.5 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 2 | Step 3.5 Flash |
|---|---|---|
| Provider | Anthropic | StepFun |
| Noometry Index | 24.7 | 41.7 |
| Rank | 342 | 116 |
| Context | — | 256K |
| Input $/M | — | $0.10 |
| Output $/M | — | $0.30 |
| Weights | Proprietary | Open |

## Coding

- Claude 2: —
- Step 3.5 Flash: 41.7 (#106)

| Benchmark | Claude 2 | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | — | 1436 |
| HumanEval+ | 61.6% | — |

## Reasoning

- Claude 2: 20.8 (#213)
- Step 3.5 Flash: 21.2 (#202)

| Benchmark | Claude 2 | Step 3.5 Flash |
|---|---|---|
| NYT Connections (extended) | — | 28.4% |
| LMArena Hard Prompts | — | 1411 |
| DTBench | 51.9% | — |
| Epoch Capabilities Index | 120.08 | — |

## Math

- Claude 2: 8.7 (#314)
- Step 3.5 Flash: 40.6 (#77)

| Benchmark | Claude 2 | Step 3.5 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 66.8% |
| OTIS Mock AIME 2024-2025 | 2.5% | — |
| LMArena Math | — | 1408 |
| MATH Level 5 | 11.7% | — |

## Knowledge

- Claude 2: 17.0 (#282)
- Step 3.5 Flash: 39.0 (#127)

| Benchmark | Claude 2 | Step 3.5 Flash |
|---|---|---|
| GPQA Diamond | 34.7% | — |
| LMArena Expert | — | 1422 |
| MMLU | 78.5% | — |
| TriviaQA | 87.5% | — |

## Multilingual

- Claude 2: —
- Step 3.5 Flash: 50.7 (#115)

| Benchmark | Claude 2 | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | — | 1386 |
| LMArena Chinese | — | 1448 |
| LMArena French | — | 1421 |
| LMArena German | — | 1404 |
| LMArena Japanese | — | 1353 |
| LMArena Korean | — | 1350 |
| LMArena Russian | — | 1385 |
| LMArena Spanish | — | 1419 |

## Instruction Following

- Claude 2: —
- Step 3.5 Flash: 73.3 (#119)

| Benchmark | Claude 2 | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | — | 1385 |

## Long Context

- Claude 2: —
- Step 3.5 Flash: 42.8 (#112)

| Benchmark | Claude 2 | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | — | 1402 |

## Writing & Preference

- Claude 2: —
- Step 3.5 Flash: 59.0 (#108)

| Benchmark | Claude 2 | Step 3.5 Flash |
|---|---|---|
| LMArena Text | — | 1403 |
| LMArena Creative Writing | — | 1357 |
| LMArena Multi-Turn | — | 1405 |

## FAQ

### Is Claude 2 better than Step 3.5 Flash?

Step 3.5 Flash is the stronger model overall, scoring 41.7 to 24.7 on the Noometry Index.

### How many benchmarks do Claude 2 and Step 3.5 Flash share?

0 benchmarks have published results for both models. Claude 2 has 8 scored results on Noometry and Step 3.5 Flash has 19.