What is the cheapest StepFun model?

Step 3.5 Flash is currently StepFun's cheapest paid tracked model at $0.1 per 1M input tokens and $0.3 per 1M output tokens.

How many StepFun models are tracked?

3 current StepFun models are tracked, each linked to the official pricing page. The dataset is refreshed twice daily.

Does StepFun offer cached-input pricing?

StepFun lists cached-input (prompt-caching) prices for 3 tracked models — cached input is billed at a discount when a prompt prefix repeats.

StepFun

Commercial provider · 3 models tracked · Founded 2023

Shanghai AI lab behind the Step models. Its global Open Platform sells the Step 5 Preview flagship and the open-weight Step 3.7 Flash and Step 3.5 Flash reasoning models in USD, pay-as-you-go.

StepFun pricing at a glanceOctober 2026 · $ per 1M tokens

StepFun API pricing (October 2026): 3 current models range from $0.100 to $1.00 per 1M input tokens and $0.300 to $2.70 per 1M output tokens. The cheapest paid model is Step 3.5 Flash at $0.100/1M input; the priciest is Step 5 Preview at $1.00/1M input / $2.70 output. Every price links to StepFun's official pricing page and refreshes twice daily.

Models3

Input range$0.100–$1.00

Output range$0.300–$2.70

Cached-input tiers3

Today's StepFun prices

3 models · cheapest blended first

Sorted by blended cost (cheapest first). Prices per 1M tokens, October 2026 — every price links to StepFun's official pricing page.

Current StepFun model prices per 1M tokens, sorted by blended cost
Model	Blended*	Input	Output	Cached in	Context	Status
Step 3.5 Flash	$0.150	$0.100	$0.300	$0.020	262K	Current
Step 3.7 Flash	$0.438	$0.200	$1.15	$0.040	262K	Current
Step 5 Preview	$1.43	$1.00	$2.70	$0.050	1M	Preview

* Blended = (3×input + 1×output) ÷ 4 $/1M tokens · cheap · mid · expensive MODELPRICEWATCH.COM · 2026-10-08

Quick stats

Models tracked: 3
Type: commercial
Founded: 2023
Cheapest model: Step 3.5 Flash
Cheapest blended: $0.150/M

Open-weight models

2 open-weight models available from this provider.

Step 3.7 Flash

$0.200/M in · 262K ctx

Step 3.5 Flash

$0.100/M in · 262K ctx

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Run it yourself

Self-host StepFun's open-weight models

These models ship with open weights, so you can serve them yourself on rented GPUs instead of paying per-token API prices — often cheaper at scale.

RunPod →

Rent GPUs by the second and serve any open-weight model yourself.

Novita AI →

Serverless open-model inference billed per token — no GPU ops.

Vast.ai →

GPU marketplace — rent spot/on-demand GPUs cheaply and serve any open-weight model.

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