Step 3.5 Flash Thinking | Sulat AI Models

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Step 3.5 Flash Thinking | Sulat AI Models

Model details

Step 3.5 Flash Thinking

Find out what this model does, when it was released, and which provider serves it.

NanoGPTstepfun-ai/step-3.5-flash:thinkingstep

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Quick Info

Provider: NanoGPT
Model key: stepfun-ai/step-3.5-flash:thinking
Release date: Feb 2, 2026
Last updated: Feb 2, 2026
Knowledge: Unknown
Input modalities: text
Output modalities: text
Capabilities: Reasoning
Cost summary: In $0.20 · Out $0.50
Limit summary: 256,000 token context window

Cost

Input token cost: $0.20
Output token cost: $0.50

Limits

Input tokens: 256,000 tokens
Output tokens: 256,000 tokens

Context window

256,000 tokens