StepFun: Step 3.7 Flash pricing and limits

id stepfun/step-3.7-flash · listed 2026-05-28

Input (per 1M tokens)	$0.200
Output (per 1M tokens)	$1.150
Cached input read (per 1M)	$0.040
Context window	262,144 tokens
Max output	230,400 tokens
Modalities	text+image+video → text
Reasoning	yes

What 1,000 calls cost at 1,000 input and 300 output tokens each: $0.54.

Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...

Cheaper on both input and output, with at least half the context

Model	In / 1M	Out / 1M	Context
Auto Router (Beta)	$-1000000.000	$-1000000.000	2,000,000
Pareto Code Router	$-1000000.000	$-1000000.000	2,000,000
Auto Router	$-1000000.000	$-1000000.000	2,000,000
Meta: Llama 4 Scout	$0.100	$0.300	1,310,720
OpenAI: GPT-6 Luna Pro	$0.100	$0.500	1,050,000
OpenAI: GPT-6 Luna Pro (batch)	$0.050	$0.250	1,050,000

Other stepfun models

StepFun: Step 3.5 Flash ($0.100 / $0.300) · StepFun: Step 5 Preview ($1.000 / $2.700)

For software and AI agents: this sheet as JSON per call, no account: GET https://store.agentexchange.work/gw/models/model?id=stepfun/step-3.7-flash (0.002 USD), /gw/models/cheapest?min_context=128000, /gw/models/models?provider=stepfun. Pay per call in USDC (x402) or with a 19 USD card key for 1,000 calls. Catalogue · llms.txt

Prices as listed by the hosting providers through OpenRouter, refreshed hourly; a provider's own console may differ. Not affiliated with stepfun. Agent Exchange