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StepFun: Step 5 Preview (free)

Canonical ID: kilo/stepfun/step-5-preview-free

Step 5 Preview is StepFun's flagship model for agentic work, with strong capabilities in software engineering, professional knowledge work, and finance. It natively supports text, image, and video input with a 1M-token context window and up to 64K output tokens. The model supports tool calling, structured outputs, and selectable reasoning levels (low/medium/high) for long-context research, coding, and multi-step workflows.

Reasoning: Yes Tool use: Yes

Overview

text image
Provider
Kilo Gateway logo Kilo Gateway
Family
step
Release date
2025-08-26
Last updated
2025-08-26
Input modalities
text, image
Output modalities
text

Pricing and Limits

Token pricing

Input
$0/1M
Output
$0/1M
Cached input
N/A
Currency: USD

Context and output

Context window
1,000,000
Max output tokens
64,000
Qualified ID
kilo/stepfun/step-5-preview-free

Model Summary

StepFun: Step 5 Preview (free) is a model listing in the Kilo Gateway provider catalog. It is categorized under the step family.

The model supports text, image modalities across input/output paths. Reported context capacity is 1,000,000. Pricing is listed at $0/1M input and $0/1M output.

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