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Step 3.7 Flash

Reasoning model

Step 3.7 Flash

Release date: 2026-05-29Updated: 2026-07-17 21:57:46.4021,154
Live demoGitHubHugging FaceCompare
Parameters
198B
Context length
256K
Chinese support
Supported
Reasoning ability

Step 3.7 Flash is a reasoning model from StepFunAI, released on 2026-05-29. It accepts text, image, and video input and returns text output. The cataloged parameter count is 198B, with 11B active parameters per inference. The recorded context window is 256K. Cataloged capabilities include Reasoning model and Multilingual. The checkpoint is listed under the Apache 2.0 license, with the license link included in the model references. Use the linked references to confirm current access, licensing, and provider-specific limits.

Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology

Step 3.7 Flash

Model basics

Reasoning traces
Supported
Thinking modes
Thinking modes not supported
Context length
256K tokens
Max output length
No data
Model type
Reasoning model
Modality (in / out)
Text, Image, Video → Text
Release date
2026-05-29
Model file size
403 GB (BF16 Safetensors)
MoE architecture
Yes
Total params / Active params
198B / 11B
Knowledge cutoff
No data
Step 3.7 Flash

Open source & experience

Step 3.7 Flash

Official resources

Paper
Paper
DataLearnerAI blog
No blog post yet
Step 3.7 Flash

API details

API speed
3/5
💡Default unit: $/1M tokens. If vendors use other units, follow their published pricing.
Learn about pricing modes
Standard
TypeConditionInputOutput
Text-¥1.35/ 1M¥8.10/ 1M
Image-¥1.35/ 1M-
Video-¥1.35/ 1M-
Cache PricingPrompt Cache
TypeTTLWriteRead
Text--¥0.270/ 1M
Image--¥0.270/ 1M
Video--¥0.270/ 1M
Step 3.7 Flash

Benchmark Results

Step 3.7 Flash currently shows benchmark results led by HLE (37 / 172, score 47.20), SimpleVQA (1 / 3, score 79.20), SWE-Bench Pro - Public (23 / 54, score 56.30). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.

Thinking

General Knowledge

1 evaluations
Benchmark / mode
Score
Rank/total
HLE
Thinking ModeTools
47.20
37 / 172

Multimodal Understanding

1 evaluations
Benchmark / mode
Score
Rank/total
SimpleVQA
Thinking ModeTools
79.20
1 / 3

Coding and Software Engineer

1 evaluations
Benchmark / mode
Score
Rank/total
SWE-Bench Pro - Public
Thinking ModeTools
56.30
23 / 54

AI Agent - Information Search

1 evaluations
Benchmark / mode
Score
Rank/total
BrowseComp
Thinking ModeTools
75.82
25 / 53

AI Agent - Tool Usage

1 evaluations
Benchmark / mode
Score
Rank/total
TerminalBench 2.1
Thinking ModeTools
59.50
23 / 27
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Step 3.7 Flash

Publisher

Step 3.7 Flash

Model Overview

Step 3.7 Flash is a reasoning model from StepFunAI, released on 2026-05-29.

It accepts text, image, and video input and produces text output. Its cataloged capabilities include Reasoning model and Multilingual. The cataloged parameter count is 198B, with 11B active parameters per inference. The recorded context window is 256K.

The checkpoint is listed under the Apache 2.0 license, with the license link included in the model references. The page records 7 API pricing rules from StepFunAI; current provider pricing and conditions should be checked before deployment. The evaluation section contains 5 cataloged benchmark results with their recorded modes and scores. The page links 4 release, model-card, repository, or provider references for checking the underlying claims. Specifications, availability, and prices can change; undisclosed values are intentionally left unstated.

Step 3.7 Flash

FAQ

What is Step 3.7 Flash?

Step 3.7 Flash is a reasoning model from StepFunAI, released on 2026-05-29. It accepts text, image, and video input and returns text output. The cataloged parameter count is 198B, with 11B active parameters per inference. The recorded context window is 256K. Cataloged capabilities include Reasoning model and Multilingual. The checkpoint is listed under the Apache 2.0 license, with the license link included in the model references. Use the linked references to confirm current access, licensing, and provider-specific limits.

What input and output modalities does Step 3.7 Flash support?

The current model record lists text, image, and video as input and text as output.

What are the main recorded specifications for Step 3.7 Flash?

The cataloged parameter count is 198B, with 11B active parameters per inference. The recorded context window is 256K. Fields without a source-backed value remain undisclosed.

Does Step 3.7 Flash have API pricing?

The page records 7 API pricing rules from StepFunAI; current provider pricing and conditions should be checked before deployment.

Are benchmark results available for Step 3.7 Flash?

The evaluation section contains 5 cataloged benchmark results with their recorded modes and scores. Compare only results that use the same benchmark version and evaluation mode.

Is Step 3.7 Flash open source?

The checkpoint is listed under the Apache 2.0 license, with the license link included in the model references. Review the linked license text before commercial or derivative use.

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