# Step 3.5 Flash vs Yi-1.5-34B

> Step 3.5 Flash is the stronger model overall, scoring 42.3 to 30.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/step-3-5-flash-vs-yi-1-5-34b
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Step 3.5 Flash scores higher in 7 categories and Yi-1.5-34B in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Step 3.5 Flash leads 39.6 to 14.8.

## Snapshot

| | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| Provider | StepFun | 01.AI |
| Noometry Index | 42.3 | 30.6 |
| Rank | 116 | 289 |
| Context | 256K | — |
| Input $/M | $0.10 | — |
| Output $/M | $0.30 | — |
| Weights | Open | Open |

## Coding

- Step 3.5 Flash: 42.4 (#105)
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Coding | 1436 | 1169 |
| BigCodeBench Instruct | — | 33.9% |
| BigCodeBench Complete | — | 43.8% |

## Reasoning

- Step 3.5 Flash: 22.2 (#202)
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Hard Prompts | 1411 | 1160 |
| NYT Connections (extended) | 28.4% | — |

## Math

- Step 3.5 Flash: 42.6 (#84)
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Math | 1408 | 1182 |
| MathArena Final-Answer Competitions | 66.8% | — |
| MATH Level 5 | — | 25.5% |

## Knowledge

- Step 3.5 Flash: 39.6 (#132)
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Expert | 1421 | 1144 |
| GPQA Diamond | — | 32% |

## Multilingual

- Step 3.5 Flash: 50.5 (#119)
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | 1385 | 1121 |
| LMArena Chinese | 1447 | 1213 |
| LMArena French | 1421 | 1156 |
| LMArena German | 1405 | 1111 |
| LMArena Japanese | 1354 | 1021 |
| LMArena Korean | 1352 | 1005 |
| LMArena Russian | 1385 | 1091 |
| LMArena Spanish | 1419 | 1121 |

## Instruction Following

- Step 3.5 Flash: 73.1 (#124)
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | 1385 | 1139 |

## Long Context

- Step 3.5 Flash: 42.8 (#117)
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | 1402 | 1143 |

## Writing & Preference

- Step 3.5 Flash: 58.8 (#113)
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | Step 3.5 Flash | Yi-1.5-34B |
|---|---|---|
| LMArena Text | 1403 | 1173 |
| LMArena Creative Writing | 1357 | 1135 |
| LMArena Multi-Turn | 1405 | 1153 |

## FAQ

### Is Step 3.5 Flash better than Yi-1.5-34B?

Step 3.5 Flash is the stronger model overall, scoring 42.3 to 30.6 on the Noometry Index.

### Is Step 3.5 Flash or Yi-1.5-34B better for coding?

Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 32.4 in the Noometry coding category.

### How many benchmarks do Step 3.5 Flash and Yi-1.5-34B share?

17 benchmarks have published results for both models. Step 3.5 Flash has 19 scored results on Noometry and Yi-1.5-34B has 21.