Which AI models does StepFun serve?

Of the models we benchmark, StepFun serves 1 through OpenRouter: Step 5 Preview.

What is the most accurate model on StepFun?

Step 5 Preview by StepFun, with a verification score of 63.8% (51 of 80 questions correct) in our tests.

Is StepFun the cheapest host?

StepFun has the lowest list price for 1 of the 1 models it serves that other hosts also serve (Step 5 Preview). Its median markup over the cheapest host is Cheapest.

API host · catalogue checked 27 Oct 2026

StepFun: models, prices and uptime

StepFun serves 1 of the 78 models we benchmark through OpenRouter. Prices are OpenRouter's list prices per million tokens. We did not measure speed per host.

Models served1of 78 we test

Cheapest host for1of 1 shared models

Median premiumCheapestover the cheapest host

Uptime—last 30 min, average

Most accurate models on StepFun

Verification score of each model this host serves

1Step 5 PreviewStepFun63.8%

Models on StepFun

Premium: this host's blended price (3 input : 1 output) against the cheapest host for the same model

Model	Score	Input / 1M	Output / 1M	vs cheapest host	Hosts	Context	Max output	Quantization	Uptime
Step 5 Preview	63.8%	$1	$2.7	Cheapest	4	1M	64k	fp8	—

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StepFun: frequently asked questions

Which AI models does StepFun serve?: Of the models we benchmark, StepFun serves 1 through OpenRouter: Step 5 Preview.
What is the most accurate model on StepFun?: Step 5 Preview by StepFun, with a verification score of 63.8% (51 of 80 questions correct) in our tests.
Is StepFun the cheapest host?: StepFun has the lowest list price for 1 of the 1 models it serves that other hosts also serve (Step 5 Preview). Its median markup over the cheapest host is Cheapest.