StepFun

Step series multimodal and reasoning models.

Release timeline

Each model’s best configuration by release date. The top eight are labelled; hover any point for its name.

Over the last two years StepFun shipped 3 distinct models, one every 406 days on median. The latest arrived on 29 May 2026.

If the cadence holds, the next one lands between 27 Jan 2027 and 18 Dec 2027.

An estimate from past release dates only. It knows nothing about roadmaps or announcements.

Fastest ranked model: Step 3.5 Flash at 216 tok/s.

Every StepFun model with a result, one row per model; switch to all configurations to see each reasoning effort.

9 of 9

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1	Step 3.5 FlashStepFunopen ↗	54.9±4	$0.150	216	10 s	256k	2026-02-11	2026-09-02
2	Step 3.7 FlashStepFunopen ↗	54.6±5	$0.416	86	26 s	256k	2026-05-29	2026-05-29
3	Step 3StepFun	51.9±2	–	–	–	–	–	2026-09-02
4	Step3 VL 10BStepFunopen ↗	43.0±7	–	–	–	66k	–	–
5	Step 1o Turbo 202506StepFun	–	–	–	–	–	–	2026-09-02
6	Step 2StepFun	–	$8.02	–	–	16k	2025-01-01	2026-09-02
7	Step 1o Vision HighresStepFun	–	–	–	–	–	–	2026-08-27
8	Step 1vStepFun	–	–	–	–	–	–	2026-08-27
9	Step 1StepFun	–	$3.94	–	–	33k	2025-01-01	–