Stepfun-Ai/Gelab Zero 4b Preview

Name: Stepfun-Ai/Gelab Zero 4b Preview
Brand: stepfun
SKU: stepfun/gelab-zero-4b-preview

stepfun·stepfun/gelab-zero-4b-preview·GA·Closed

StepFun flash model for efficient multimodal reasoning, coding, and tool use

At a glance

Reference pricePrice undisclosed

Lowest paidNo paid channels

Context8,192

Output limit4,096

Capabilities

Reasoning✓ Tool useStructured output✓ Temperature✓ Attachments

Modalities

TextImage

Knowledge cutoff—

Released / updated2025-12-23 / 2025-12-23

Quality & performance

Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.

Available at 1 providers0 with public prices

Priced only

Provider	Tier	Input	Output	Cache read	Cache write	Context	Output limit	Status
Qiniu	Gateway	—	—	—	—	8,192	4,096	hostTable.undisclosed

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.

Your usage cost

Input tokens / month

Output tokens / month

Cache hit rate

Common scenarios

This model has no public prices; can't estimate.

Price historyone sample accumulated per data sync

Input listOutput listMin blended