Free {family} model via API
StepFun's Step models cover multimodal reasoning and fast Flash variants for agents.
2 models2 providersup to 1M contextbest: Step 5 PreviewUpdated:
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The table refreshes every four hours from aggregator APIs. The same model at different providers is a separate endpoint with its own limits.
Benchmarks: Artificial Analysis (September 24, 2026). A dash means the model is not on their leaderboard; we never estimate scores ourselves.
About Step
StepFun
StepFun's Step models cover multimodal reasoning and fast Flash variants for agents.
FAQ
Which Step models are free?
Currently 2 models are free: Step 5 Preview, Step 3.7 Flash.
Where can I get a free Step API key?
Free Step routes are available at: NVIDIA Build, Nous Portal. Get a key in the provider's dashboard; links are on each model card.
Who develops Step?
StepFun's Step models cover multimodal reasoning and fast Flash variants for agents.