AI models

NanoGPTstep

stepfun-ai/step-3.5-flashNanoGPTReleased Feb 2, 2026256,000 token context windowIn $0.20 · Out $0.50

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OpenRouterstep

stepfun/step-3.5-flashOpenRouterReleased Jan 29, 2026262,144 token context windowIn $0.09 · Out $0.30

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NanoGPTstep

stepfun-ai/step-3.5-flash:thinkingNanoGPTReleased Feb 2, 2026256,000 token context windowIn $0.20 · Out $0.50

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OpenRouterstep

stepfun/step-3.7-flashOpenRouterReleased May 28, 2026256,000 token context windowIn $0.20 · Out $1.15

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SiliconFlowstep

stepfun-ai/Step-3.5-FlashSiliconFlowReleased Feb 11, 2026262,000 token context windowIn $0.10 · Out $0.30

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SiliconFlow (China)step

stepfun-ai/Step-3.5-FlashSiliconFlow (China)Released Feb 11, 2026262,000 token context windowIn $0.10 · Out $0.30

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