Creator unverified · deprecated

Step-3

Step-3 is listed with its creator unverified. It accepts image and text input and produces text output. Reported capabilities include reasoning and tool calling.

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Report an error Model and price history

Modalities

Token rates

Unavailable

No recent paired token rate available

Context

66K

Released

2025-07-31

Knowledge cutoff

Jan 1, 2025

Where to use it

1 observed offerings · token prices in USD per million where available

Estimate your workload cost

ZenMux

stepfun/step-3

deprecated

Input

$0.21

Output

$0.57

Cache

—

Context

66K

Max output

64K

Reasoning: Yes
Tool calling: Yes
Structured output: Unknown
Temperature: Yes

Historical price

Limits and capabilities reflect each provider’s listed offering. Unknown means support was not reported.

Provider / API ID	Status	Context	Max output	Input	Output	Cache read	Reasoning	Tools	Structured	Temperature
ZenMux stepfun/step-3	deprecatedHistorical price	66K	64K	$0.21	$0.57	—	Yes	Yes	Unknown	Yes

Capabilities and limits

Input: image, text
Output: text
Max output: 64K
Weights: Closed (source-reported)
Release: 2025-07-31
Knowledge cutoff: Jan 1, 2025
Family: step

Reasoning · Tool calling · Vision

Provider-specific limits and support can differ.

Plan a model evaluation

Evaluate quality and latency on examples from your intended use before choosing a model.

Explore available evidence

Models to compare

Candidates match reported specifications; they are not tested replacements.

Step 3.7 FlashCreator unverified · 256K contextCompare →StepFun: Step 5 Preview (free)Creator unverified · 1M contextCompare →Step 5 PreviewNVIDIA · 1.05M contextCompare →

Model and price history

Price history (20 observations)

Date	Provider	Input / output
2026-10-22	ZenMux	$0.21 / $0.57
2026-10-21	ZenMux	$0.21 / $0.57
2026-10-20	ZenMux	$0.21 / $0.57
2026-10-19	ZenMux	$0.21 / $0.57
2026-10-18	ZenMux	$0.21 / $0.57
2026-10-17	ZenMux	$0.21 / $0.57
2026-10-12	ZenMux	$0.21 / $0.57
2026-10-12	ZenMux	$0.21 / $0.57
2026-10-11	ZenMux	$0.21 / $0.57
2026-10-10	ZenMux	$0.21 / $0.57
2026-10-09	ZenMux	$0.21 / $0.57
2026-10-09	ZenMux	$0.21 / $0.57
2026-10-08	ZenMux	$0.21 / $0.57
2026-10-07	ZenMux	$0.21 / $0.57
2026-09-22	ZenMux	$0.21 / $0.57
2026-09-21	ZenMux	$0.21 / $0.57
2026-09-20	ZenMux	$0.21 / $0.57
2026-09-19	ZenMux	$0.21 / $0.57
2026-09-18	ZenMux	$0.21 / $0.57
2026-09-17	ZenMux	$0.21 / $0.57