StepFun, proprietary

# Step 5 Preview

> Step 5 Preview by StepFun, released September 2026. Ranked #58 of 354 with a Noometry Index of 47.9. API: $1 in / $2.70 out per M tokens. 1.02M context. Scores, sources and comparisons.
- Canonical page: https://noometry.com/models/step-5-preview
- Last updated: 2026-10-10
- Title: Step 5 Preview Benchmarks, Price & Rank (October 2026)

Step 5 Preview by StepFun ranks 58th of 354 ranked models on the Noometry Index as of October 2026, with a score of 47.9. Its strongest category is coding, where it ranks 36th. API pricing starts at $1 per million input tokens and $2.70 per million output tokens, with a 1.02M-token context window.

Last verified October 10, 2026

## Specifications

- **Noometry rank:** #58 of 354
- **Index score:** 47.9
- **Evidence:** Confirmed 18 results
- **Provider:** [![](/logos/stepfun.svg) StepFun](https://noometry.com/providers/stepfun)
- **Released:** September 16, 2026
- **Weights:** Proprietary
- **Reasoning:** Yes
- **Context window:** 1.02M
- **Max output:** 66K
- **Input price:** $1 / M
- **Output price:** $2.70 / M
- **Blended price:** $1.43 / M
- **Output speed:** Not measured
- **Value:** #129 of 219
- **Knowledge cutoff:** Unknown
- **Input:** text, image, video

## Category scores

Each category score combines every public result we have in that category.

Step 5 Preview category scores

1.  Coding 51.8
2.  Reasoning 40.0
3.  Math 46.1
4.  Knowledge 41.2
5.  Multimodal 41.0
6.  Multilingual 53.8
7.  Instruction Following 76.0
8.  Long Context 44.5
9.  Writing & Preference 62.8
10.  304050607080

Step 5 Preview category ranks
| Category | Score | Rank | Results |
| --- | --- | --- | --- |
| [Coding](https://noometry.com/best/coding) | 51.8 | #36 | 3 |
| [Reasoning](https://noometry.com/best/reasoning) | 40.0 | #57 | 2 |
| [Math](https://noometry.com/best/math) | 46.1 | #72 | 2 |
| [Knowledge](https://noometry.com/best/knowledge) | 41.2 | #112 | 1 |
| [Multimodal](https://noometry.com/best/multimodal) | 41.0 | #41 | 1 |
| [Multilingual](https://noometry.com/best/multilingual) | 53.8 | #54 | 1 |
| [Instruction Following](https://noometry.com/best/instruction-following) | 76.0 | #50 | 1 |
| [Long Context](https://noometry.com/best/long-context) | 44.5 | #64 | 1 |
| [Writing & Preference](https://noometry.com/best/writing) | 62.8 | #71 | 3 |

## Strengths and weaknesses

Categories where Step 5 Preview places highest and lowest among the models ranked in each, with its score against that category's median.

### Strongest categories

Step 5 Preview: strongest categories
| Category | Score | vs median | Rank |
| --- | --- | --- | --- |
| [Coding](https://noometry.com/best/coding) | 51.8 | +13.1 | #36 of 340, top 11% |
| [Reasoning](https://noometry.com/best/reasoning) | 40.0 | +16.4 | #57 of 350, top 17% |
| [Instruction Following](https://noometry.com/best/instruction-following) | 76.0 | +4.7 | #50 of 305, top 17% |

### Weakest categories

Step 5 Preview: weakest categories
| Category | Score | vs median | Rank |
| --- | --- | --- | --- |
| [Knowledge](https://noometry.com/best/knowledge) | 41.2 | +3.8 | #112 of 314, top 36% |
| [Multimodal](https://noometry.com/best/multimodal) | 41.0 | +2.5 | #41 of 128, top 33% |
| [Writing & Preference](https://noometry.com/best/writing) | 62.8 | +9.0 | #71 of 312, top 23% |

## Closest competitors

The models ranked just above and below Step 5 Preview. When scores are this close, price and speed are often the better way to choose.

Models ranked closest to Step 5 Preview
| Model | Rank | Score | Blended $/M | Speed |  |
| --- | --- | --- | --- | --- | --- |
| [Grok 4.20 (Non-Reasoning)](https://noometry.com/models/grok-4-20) | #54 | 48.6 | $1.56 | 61 | [Compare](https://noometry.com/compare/grok-4-20-vs-step-5-preview) |
| [MiMo-V2.6-Flash](https://noometry.com/models/mimo-v2-6-flash) | #55 | 48.5 | $0.18 | — | [Compare](https://noometry.com/compare/mimo-v2-6-flash-vs-step-5-preview) |
| [Grok 4](https://noometry.com/models/grok-4) | #56 | 48.1 | — | 1 | [Compare](https://noometry.com/compare/grok-4-vs-step-5-preview) |
| [Kimi K2.5](https://noometry.com/models/kimi-k2-5) | #57 | 48.1 | $0.90 | 66 | [Compare](https://noometry.com/compare/kimi-k2-5-vs-step-5-preview) |
| [GLM-5.1](https://noometry.com/models/glm-5-1) | #59 | 47.8 | $2.15 | — | [Compare](https://noometry.com/compare/glm-5-1-vs-step-5-preview) |
| [Kimi K2.6](https://noometry.com/models/kimi-k2-6) | #60 | 47.7 | $1.71 | — | [Compare](https://noometry.com/compare/kimi-k2-6-vs-step-5-preview) |
| [o3](https://noometry.com/models/o3) | #61 | 47.5 | $3.50 | 3 | [Compare](https://noometry.com/compare/o3-vs-step-5-preview) |
| [Qwen3.6 Plus](https://noometry.com/models/qwen3-6-plus) | #62 | 47.5 | $1.13 | — | [Compare](https://noometry.com/compare/qwen3-6-plus-vs-step-5-preview) |

Sponsored placements are available on pages like this one. [Advertise on Noometry](https://noometry.com/advertise)

## Benchmark results

Every published result we track, with its source. Bold rows are the ones used for ranking; where several exist we prefer independent runs over self-reported numbers.

### Coding

Step 5 Preview Coding benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [LMArena WebDev](https://noometry.com/benchmarks/arena-webdev) | 1564 | #30 of 113, top 27% | high | [LMArena](https://lmarena.ai/leaderboard/webdev) | 2026-10-08 |
| [SciCode](https://noometry.com/benchmarks/scicode) | 58.9% | #12 of 121, top 10% |  | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [LMArena Coding](https://noometry.com/benchmarks/arena-coding) | 1480 | #47 of 294, top 16% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |

### Reasoning

Step 5 Preview Reasoning benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [CritPt](https://noometry.com/benchmarks/critpt) | 20.9% | #22 of 134, top 17% |  | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [LMArena Hard Prompts](https://noometry.com/benchmarks/arena-hard-prompts) | 1465 | #42 of 297, top 15% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |

### Math

Step 5 Preview Math benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [ProofBench](https://noometry.com/benchmarks/proofbench) | 42% | #35 of 77, top 46% |  | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [LMArena Math](https://noometry.com/benchmarks/arena-math) | 1470 | #41 of 285, top 15% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |

### Knowledge

Step 5 Preview Knowledge benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [LMArena Expert](https://noometry.com/benchmarks/arena-expert) | 1470 | #50 of 273, top 19% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |

### Multimodal

Step 5 Preview Multimodal benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [LMArena Vision](https://noometry.com/benchmarks/arena-vision) | 1267 | #40 of 122, top 33% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/vision) | 2026-10-09 |

### Multilingual

Step 5 Preview Multilingual benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [LMArena Non-English](https://noometry.com/benchmarks/arena-non-english) | 1432 | #54 of 297, top 19% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |
| [LMArena Chinese](https://noometry.com/benchmarks/arena-chinese) | 1519 | #26 of 285, top 10% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |
| [LMArena Russian](https://noometry.com/benchmarks/arena-russian) | 1436 | #58 of 283, top 21% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |
| [LMArena Spanish](https://noometry.com/benchmarks/arena-spanish) | 1439 | #68 of 226, top 31% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |

### Instruction Following

Step 5 Preview Instruction Following benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [LMArena Instruction Following](https://noometry.com/benchmarks/arena-instruction-following) | 1444 | #46 of 298, top 16% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |

### Long Context

Step 5 Preview Long Context benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [LMArena Longer Query](https://noometry.com/benchmarks/arena-longer-query) | 1455 | #45 of 291, top 16% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |

### Writing & Preference

Step 5 Preview Writing & Preference benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [LMArena Text](https://noometry.com/benchmarks/arena-text) | 1442 | #58 of 297, top 20% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |
| [LMArena Creative Writing](https://noometry.com/benchmarks/arena-creative-writing) | 1410 | #64 of 295, top 22% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |
| [LMArena Multi-Turn](https://noometry.com/benchmarks/arena-multi-turn) | 1447 | #59 of 295, top 20% | Step 5 Preview | [LMArena](https://lmarena.ai/leaderboard/text) | 2026-10-08 |

## API pricing by provider

Step 5 Preview API prices
| Route | Input $/M | Output $/M | Cached input $/M | Checked |
| --- | --- | --- | --- | --- |
| [openrouter](https://openrouter.ai/stepfun/step-5-preview) | $1 | $2.70 | $0.05 | 2026-10-10 |
| [stepfun](https://platform.stepfun.ai/docs/en/overview/concept) | $1 | $2.70 | $0.05 | 2026-10-10 |

[All StepFun API prices →](https://noometry.com/llm-pricing/stepfun) [Estimate your cost →](https://noometry.com/tools/cost-calculator)

## Compare Step 5 Preview

-   [Step 5 Preview vs Kimi K2.5](https://noometry.com/compare/kimi-k2-5-vs-step-5-preview)
-   [Step 5 Preview vs GLM-5.1](https://noometry.com/compare/glm-5-1-vs-step-5-preview)
-   [Step 5 Preview vs Grok 4](https://noometry.com/compare/grok-4-vs-step-5-preview)
-   [Step 5 Preview vs Kimi K2.6](https://noometry.com/compare/kimi-k2-6-vs-step-5-preview)
-   [Step 5 Preview vs MiMo-V2.6-Flash](https://noometry.com/compare/mimo-v2-6-flash-vs-step-5-preview)
-   [Step 5 Preview vs o3](https://noometry.com/compare/o3-vs-step-5-preview)
-   [Step 5 Preview vs GPT-6 Astra](https://noometry.com/compare/gpt-6-astra-vs-step-5-preview)
-   [Step 5 Preview vs Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-step-5-preview)
-   [Step 5 Preview vs Gemini 3.8 Flash](https://noometry.com/compare/gemini-3-8-flash-vs-step-5-preview)
-   [Step 5 Preview vs Kimi K3](https://noometry.com/compare/kimi-k3-vs-step-5-preview)
-   [Step 5 Preview vs Grok 4.6](https://noometry.com/compare/grok-4-6-vs-step-5-preview)
-   [Step 5 Preview vs Qwen3.8 Max](https://noometry.com/compare/qwen3-8-max-vs-step-5-preview)
-   [Step 5 Preview vs GLM-5.3](https://noometry.com/compare/glm-5-3-vs-step-5-preview)
-   [Step 5 Preview vs Muse Spark 1.3](https://noometry.com/compare/muse-spark-1-3-vs-step-5-preview)

## Other StepFun models

-   [Step 3.5 Flash](https://noometry.com/models/step-3-5-flash)42.3
-   [Step 3](https://noometry.com/models/step-3)40.5
-   [Step 1o Turbo 202506](https://noometry.com/models/step-1o-turbo-202506)39.7
-   [Step 2 16k Exp 202412](https://noometry.com/models/step-2-16k-exp-202412)39.2
-   [Step 3.7 Flash](https://noometry.com/models/step-3-7-flash)37.3
-   [Step 1 (32K)](https://noometry.com/models/step-1)
-   [Step 2 (16K)](https://noometry.com/models/step-2)

## Frequently asked questions

### How good is Step 5 Preview?

Step 5 Preview by StepFun ranks 58th of 354 ranked models on the Noometry Index as of October 2026, with a score of 47.9. Its strongest category is coding, where it ranks 36th. API pricing starts at $1 per million input tokens and $2.70 per million output tokens, with a 1.02M-token context window.

### How much does Step 5 Preview cost?

Step 5 Preview costs $1 per million input tokens and $2.70 per million output tokens on StepFun's own API, with cached input at $0.05.

### What is Step 5 Preview's context window?

Step 5 Preview accepts up to 1.02M tokens of input and can write up to 66K tokens in one response.

### Is Step 5 Preview open source?

No. Step 5 Preview is proprietary and available only through StepFun's API and partner platforms.

### What are Step 5 Preview's strengths and weaknesses?

Relative to other ranked models, Step 5 Preview places best in coding, reasoning, instruction following and lowest in knowledge, multimodal, writing & preference.

### What is Step 5 Preview best at?

Its best category is coding, where it ranks 36th on Noometry.

### Cite this page

Noometry. (2026). Step 5 Preview benchmarks and pricing. Retrieved October 10, 2026, from https://noometry.com/models/step-5-preview

Quote Noometry with a link back to this page. It is also available in [Markdown](https://noometry.com/md/models/step-5-preview.md).