# Claude 2.1 vs Step 3.7 Flash

> Step 3.7 Flash is the stronger model overall, scoring 37.3 to 25.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-step-3-7-flash
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Step 3.7 Flash leads 42.9 to 10.2.
- Step 3.7 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 2.1 | Step 3.7 Flash |
|---|---|---|
| Provider | Anthropic | StepFun |
| Noometry Index | 25.2 | 37.3 |
| Rank | 345 | 207 |
| Context | — | 256K |
| Input $/M | — | $0.18 |
| Output $/M | — | $1.11 |
| Weights | Proprietary | Open |

## Coding

- Claude 2.1: 26.2 (#327)
- Step 3.7 Flash: 40.0 (#150)

| Benchmark | Claude 2.1 | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| WeirdML | 7.1% | — |
| ALE-Bench | — | 694.12 |

## Reasoning

- Claude 2.1: 21.4 (#221)
- Step 3.7 Flash: 21.6 (#219)

| Benchmark | Claude 2.1 | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | — | 39.7% |
| CritPt | — | 2.3% |
| DTBench | 51% | — |
| Epoch Capabilities Index | 119.27 | — |
| ForecastBench | 54.2 | — |

## Math

- Claude 2.1: 10.2 (#315)
- Step 3.7 Flash: 42.9 (#82)

| Benchmark | Claude 2.1 | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| OTIS Mock AIME 2024-2025 | 1.9% | — |

## Knowledge

- Claude 2.1: 15.4 (#292)
- Step 3.7 Flash: —

| Benchmark | Claude 2.1 | Step 3.7 Flash |
|---|---|---|
| GPQA Diamond | 33% | — |
| MMLU | 73.5% | — |

## FAQ

### Is Claude 2.1 better than Step 3.7 Flash?

Step 3.7 Flash is the stronger model overall, scoring 37.3 to 25.2 on the Noometry Index.

### Is Claude 2.1 or Step 3.7 Flash better for coding?

Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 26.2 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and Step 3.7 Flash share?

0 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Step 3.7 Flash has 5.