# GPT-6.1 Sol vs Step 3

> GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 40.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-6-1-sol-vs-step-3
- Last updated: 2026-10-11
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. GPT-6.1 Sol scores higher in 9 categories and Step 3 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-6.1 Sol leads 93.7 to 37.6.
- Step 3 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-6.1 Sol | Step 3 |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 65.6 | 40.5 |
| Rank | 6 | 149 |
| Context | 1.05M | — |
| Input $/M | $2 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-6.1 Sol: 63.2 (#8)
- Step 3: 40.1 (#147)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Coding | 1487 | 1367 |
| DeepSWE | 75.2% | — |
| FrontierCode | 50.2% | — |
| LMArena WebDev | 1755 | — |
| SciCode | 55.8% | — |

## Agentic & Tool Use

- GPT-6.1 Sol: 39.6 (#26)
- Step 3: —

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| APEX-Agents | 60% | — |
| GDP.pdf | 32% | — |

## Reasoning

- GPT-6.1 Sol: 81.9 (#2)
- Step 3: 28.4 (#105)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Hard Prompts | 1466 | 1355 |
| ARC-AGI-2 | 94.2% | — |
| Kagi LLM Benchmark | — | 62.3% |
| NYT Connections (extended) | 95.5% | — |
| ARC-AGI-1 | 98.5% | — |
| CritPt | 31.7% | — |
| Chess Puzzles | 61% | — |
| EBR-Bench | 54.3% | — |
| Mystery Game Puzzles | 80% | — |
| Epoch Capabilities Index | 166.09 | — |

## Math

- GPT-6.1 Sol: 93.7 (#1)
- Step 3: 37.6 (#148)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Math | 1464 | 1366 |
| FrontierMath (Tiers 1-3) | 93.7% | — |
| FrontierMath Tier 4 | 100% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 99% | — |

## Knowledge

- GPT-6.1 Sol: 71.8 (#4)
- Step 3: 36.8 (#164)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Expert | 1502 | 1333 |
| GPQA Diamond | 95.4% | — |
| SimpleQA Verified | 73.9% | — |

## Multimodal

- GPT-6.1 Sol: 52.7 (#5)
- Step 3: 35.5 (#86)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Vision | 1288 | 1177 |
| Furniture Assembly | 80% | — |

## Multilingual

- GPT-6.1 Sol: 54.3 (#46)
- Step 3: 46.3 (#159)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Non-English | 1438 | 1327 |
| LMArena Chinese | 1477 | 1397 |
| LMArena Russian | 1455 | 1331 |
| LMArena German | — | 1371 |
| LMArena Korean | — | 1269 |
| LMArena Spanish | — | 1371 |

## Instruction Following

- GPT-6.1 Sol: 77.0 (#29)
- Step 3: 70.4 (#164)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Instruction Following | 1468 | 1332 |

## Long Context

- GPT-6.1 Sol: 44.9 (#54)
- Step 3: 40.3 (#157)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Longer Query | 1465 | 1326 |

## Writing & Preference

- GPT-6.1 Sol: 63.6 (#63)
- Step 3: 54.3 (#151)

| Benchmark | GPT-6.1 Sol | Step 3 |
|---|---|---|
| LMArena Text | 1447 | 1350 |
| LMArena Creative Writing | 1432 | 1321 |
| LMArena Multi-Turn | 1449 | 1341 |

## FAQ

### Is GPT-6.1 Sol better than Step 3?

GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 40.5 on the Noometry Index.

### Is GPT-6.1 Sol or Step 3 better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 63.2 versus 40.1 in the Noometry coding category.

### How many benchmarks do GPT-6.1 Sol and Step 3 share?

13 benchmarks have published results for both models. GPT-6.1 Sol has 34 scored results on Noometry and Step 3 has 17.