Stepfun · stepfun/step-3.5-flash

step-3.5-flash

Budget Everyday 262k context Hermes Limited

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....

Input / M

$0.100

Output / M

$0.300

Value score

289

30d price Δ

Reasoning (AA)

Coding (AA)

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Tool / agentic

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Knowledge cutoff

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Price history

Not enough history yet — newer than the backfill window.

Capability snapshot

Last-known Artificial Analysis indexes via OpenRouter.

Index	Score
context	51.0
general_intelligence	17.0
reasoning	17.0