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Data from public sources. May not reflect real-time pricing.

Providers›StepFun

StepFun

↗ Website

StepFun (阶跃星辰) is a Chinese AI startup developing the Step family of large language models. Their models offer competitive performance and are designed for practical deployment across diverse AI applications.

Pricing available from OpenRouter, Martian.

Total Models
1
Arena Ranked
1
of 1
Open Source
0
Cheapest Input
$0.10
per 1M tokens

$ Pricing Summary(per 1M tokens)

MetricInputOutput
Cheapest$0.10$0.30
Average$0.10$0.30
Most Expensive$0.10$0.30

⚙ Capabilities

👁
Vision
0
of 1 models
🧠
Reasoning
1
of 1 models
🔧
Tool Calling
1
of 1 models
⚡
Prompt Caching
0
of 1 models
🖥
Computer Use
0
of 1 models
🎨
Image Generation
0
of 1 models

🤖 All StepFun Models(1)

StepFunStep 3
#80

StepFun: Step 3.5 Flash (free)

Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token. It is a reasoning model that is incredibly speed efficient even at long contexts.

Context
256K
Max Output
256K
Input/1M
Free
🧠 Reasoning🔧 Tools
Pricing (per 1M tokens)
OpenRouterFree / Free
Martian$0.10 / $0.30
2026-01-29View details →
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