Traictory tracks 3 models from StepFun, based in CN. The earliest entry is Step3-VL-10B from January 2026; the most recent is Step 3.7 Flash, released in June 2026. All of them shipped in the last twelve months.
The strongest StepFun model in our data is Step3-VL-10B, with an average benchmark score of 79.2% across 6 published results, including 91.8% on MMBench and 87.7% on AIME 2025. Across the 3 StepFun models with benchmark data the average is 70.0%.
2 of the models are available through an API, with input pricing from $0.10 to $0.20 per million tokens; Step-3.5-Flash is the cheapest. The largest context window is 262K tokens on Step 3.7 Flash. All of them are multimodal. StepFun publishes downloadable weights for every model listed here.
StepFun Models
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StepFun model catalog updated in 2026. See model comparisons and best models for coding.