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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
ModalitiesInput: text · Output: text
Context window256K tokens
Max output16K tokens
Speed●●●●○ Fast
FeaturesTools: Yes Streaming: Yes Vision: No
Capabilitiestools, reasoning
Pricing
$0.175 / 1M input tokens · $0.525 / 1M output tokens
Platform credit pricing — live rates on the Models page.