Step 3.7 Flash (Free)

Name: Step 3.7 Flash (Free)
Brand: stepfun
SKU: stepfun/step-3.7-flash-free

stepfun·stepfun/step-3.7-flash-free·GA·Open weights

Newer StepFun flash model for faster agents, coding, and multimodal prompts

Specs & pricing

Input / output per 1M tokens

Reference priceZenMux

$0 / $0

Blended $0 · Cache read —

Lowest paid

No paid channels

3 more $0 channels

Context

256,000

Output limit

256,000

Knowledge cutoff

2026-03-01

Released / updated

2026-05-29 / 2026-05-29

Capabilities

✓ Reasoning✓ Tool useStructured output✓ Temperature✓ Attachments

Modalities

TextImageVideo

Available at 3 providers0 with public prices · 3 free

Priced only

Provider	Tier	Input	Cache read	Cache write	Context	Output limit
ZenMux	Gateway	Free	—	—	256,000	256,000
Kenari step-3-7-flash:free	Gateway	Free	—	—	256,000	256,000
Kilo Gateway stepfun/step-3.7-flash:free	Gateway	Free	$0	—	262,144 ⚠	262,144

Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.

Reasoning control

effort = loweffort = mediumeffort = high

Your usage cost

Input tokens / month

Output tokens / month

Cache hit rate

Common scenarios

This model is $0 across all listed channels (ZenMux, Kenari, Kilo Gateway).

Price historyone sample accumulated per data sync

Input listOutput listMin blended