Step 3.5 Flash

StepFun 🧠 Language Model

StepFun's latest reasoning model — 196B MoE (11B active), 256K context, open-source Apache 2.0. Fast agentic intelligence with strong code and math.

Specifications

Context Window256,000 tokens
Max Output16,384 tokens
Speed Fast
ModalitiesInput: text  ·  Output: text
FeaturesTools: Yes Streaming: Yes

Pricing

Included with plan

Capabilities

toolsreasoning
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