S3
Economy

StepFun: Step 3.5 Flash

by stepfun

StepFun: Step 3.5 Flash represents a significant advancement in open-source AI. As StepFun's premier foundation model, it leverages a sophisticated sparse Mixture of Experts (MoE) architecture. This design allows it to activate only 11 billion of its total 196 billion parameters per token, resulting in exceptional speed efficiency, particularly when handling extensive contexts. This model is engineered for robust reasoning tasks, offering impressive performance without compromising on speed. With a substantial 256K token context window and an equally large 256K token maximum output, Step 3.5 Flash is ideal for applications requiring deep understanding and generation over long passages of text. It supports streaming and functions, enhancing its versatility for developers. Access StepFun: Step 3.5 Flash for FREE through Multi AI. Pricing is highly competitive at $0.10 per 1M input tokens and $0.30 per 1M output tokens, making it an accessible yet powerful choice for a wide range of AI-driven projects.

Text GenerationReasoningOpen SourceLong ContextMoE
47%Quality
256KContext Window
80%Speed
Category
Economy
API access
Unified context
RAG + Knowledge Base
24/7 Support
Try This ModelCompare models

🚀 Capabilities

Streaming
Functions
Long Context

Specifications

Providerstepfun
Context Window256,000 tokens
Max Output256,000 tokens
Minimum PlanEconomy

Pricing

Input Price$0.1000 / 1M tokens
Output Price$0.3000 / 1M tokens

💡 With PRO subscription, cost is reduced by 20%

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