# GPT-6.1 Sol vs Step 5 Preview

> Step 5 Preview has enough public results to be ranked (#78); GPT-6.1 Sol does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/gpt-6-1-sol-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- Step 5 Preview is cheaper at $1 / $2.70 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
- GPT-6.1 Sol accepts more context: 1.05M tokens versus 1.02M.

## Snapshot

| | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 42.1 | 43.8 |
| Rank | — | 78 |
| Context | 1.05M | 1.02M |
| Input $/M | $2 | $1 |
| Output $/M | $10 | $2.70 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-6.1 Sol: 51.4
- Step 5 Preview: 50.6 (#40)

| Benchmark | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| DeepSWE | 75.2% | — |
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |

## Agentic & Tool Use

- GPT-6.1 Sol: 34.3
- Step 5 Preview: —

| Benchmark | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| GDP.pdf | 32% | — |

## Reasoning

- GPT-6.1 Sol: —
- Step 5 Preview: 38.0 (#58)

| Benchmark | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| CritPt | — | 20.9% |

## FAQ

### Is GPT-6.1 Sol better than Step 5 Preview?

Step 5 Preview has enough public results to be ranked (#78); GPT-6.1 Sol does not yet, so treat this comparison as directional.

### Which is cheaper, GPT-6.1 Sol or Step 5 Preview?

Step 5 Preview is cheaper. It lists at $1 per million input tokens and $2.70 per million output tokens; GPT-6.1 Sol lists at $2 and $10.

### Is GPT-6.1 Sol or Step 5 Preview better for coding?

They score almost the same on coding (51.4 vs 50.6); test both on your own repository before choosing.

### Which has the bigger context window?

GPT-6.1 Sol does, with 1.05M tokens against 1.02M.

### How many benchmarks do GPT-6.1 Sol and Step 5 Preview share?

0 benchmarks have published results for both models. GPT-6.1 Sol has 2 scored results on Noometry and Step 5 Preview has 3.