StepFun (China)

Every StepFun (China) model, with specs, prices, and where to run it.

Models: 7
Open weights: 4
Families: 1
Providers: 27

Releases per month

7 in 12 mo

Capability coverage

Tool calling57%
Reasoning57%
Vision input29%
Open weights57%

Step 5 PreviewStepFun (China)·step-5-preview

1M

66K

Open

$1.05 / $2.99

$0.10

43.7

Sep 16, 2026

Sep 20, 2026

Step TTS 2StepFun (China)·step-tts-2

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Closed

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Mar 1, 2026

Jul 2, 2026

StepAudio 2.5 ASRStepFun (China)·stepaudio-2.5-asr

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?

Closed

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Apr 24, 2026

Jul 2, 2026

StepAudio 2.5 TTSStepFun (China)·stepaudio-2.5-tts

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?

Closed

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Apr 16, 2026

Jul 2, 2026

Step 3.7 FlashStepFun (China)·step-3.7-flash

256K

256K

Open

$0.20 / $1.21

$0.04

19.5

May 29, 2026

May 29, 2026

Step 3.5 Flash 2603StepFun (China)·step-3.5-flash-2603

256K

256K

Open

$0.10 / $0.31

$0.02

—

Apr 2, 2026

Apr 2, 2026

Step 3.5 FlashStepFun (China)·step-3.5-flash

256K

256K

Open

$0.10 / $0.31

$0.02

17

Jan 29, 2026

Feb 13, 2026