StepFun: Step 3.7 Flash

stepfun/step-3.7-flash

Last Observed: 2026-10-15 06:03:57.379539 UTC

Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...

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Architecture And Modalities · 3

Architecture · Instruct Type API Details /architecture/instruct_type Explicit Null	Explicit Null
Architecture · Modality API Details /architecture/modality text+image+video->text	text+image+video->text
Architecture · Tokenizer API Details /architecture/tokenizer Other	Other

Benchmarks · 3

Benchmarks · Artificial Analysis · Agentic Index API Details /benchmarks/artificial_analysis/agentic_index Explicit Null	Explicit Null
Benchmarks · Artificial Analysis · Coding Index API Details /benchmarks/artificial_analysis/coding_index 39.6	39.6
Benchmarks · Artificial Analysis · Intelligence Index API Details /benchmarks/artificial_analysis/intelligence_index 19.5	19.5

Catalog Identity And Metadata · 11

Canonical Slug API Details /canonical_slug stepfun/step-3.7-flash-20260528	stepfun/step-3.7-flash-20260528
Context Tokens API Details /context_length 262144	262,144
Created API Details /created 1779985069	2026-05-28 16:17:49 UTC
Description API Details /description Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...	Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...
Expiration Date API Details /expiration_date Explicit Null	Explicit Null
Hugging Face Id API Details /hugging_face_id stepfun-ai/Step-3.7-Flash	stepfun-ai/Step-3.7-Flash
Id API Details /id stepfun/step-3.7-flash	stepfun/step-3.7-flash
Knowledge Cutoff API Details /knowledge_cutoff Explicit Null	Explicit Null
Links · Details API Details /links/details /api/v1/models/stepfun/step-3.7-flash-20260528/endpoints	/api/v1/models/stepfun/step-3.7-flash-20260528/endpoints
Name API Details /name StepFun: Step 3.7 Flash	StepFun: Step 3.7 Flash
Supported Voices API Details /supported_voices Explicit Null	Explicit Null

Default Parameters · 6

Default Parameters · Frequency Penalty API Details /default_parameters/frequency_penalty Explicit Null	Explicit Null
Default Parameters · Presence Penalty API Details /default_parameters/presence_penalty Explicit Null	Explicit Null
Default Parameters · Repetition Penalty API Details /default_parameters/repetition_penalty Explicit Null	Explicit Null
Default Parameters · Temperature API Details /default_parameters/temperature Explicit Null	Explicit Null
Default Parameters · Top K API Details /default_parameters/top_k Explicit Null	Explicit Null
Default Parameters · Top P API Details /default_parameters/top_p Explicit Null	Explicit Null

Request Limits · 1

Per Request Limits API Details /per_request_limits Explicit Null	Explicit Null

Pricing · 3

Output Price · USD/Token API Details /pricing/completion 0.00000115	0.00000115
Pricing · Input Cache Read API Details /pricing/input_cache_read 0.00000004	0.00000004
Input Price · USD/Token API Details /pricing/prompt 0.0000002	0.0000002

Reasoning · 2

Reasoning · Default Effort API Details /reasoning/default_effort medium	medium
Reasoning · Mandatory API Details /reasoning/mandatory True	True

Provider Limits · 3

Top Provider · Context Length API Details /top_provider/context_length 256000	256,000
Top Provider · Is Moderated API Details /top_provider/is_moderated False	False
Top Provider · Max Completion Tokens API Details /top_provider/max_completion_tokens 230400	230,400

API Structure And Container Types

Architecture API Details /architecture Object · See Fields	Object · See Fields
Architecture · Input Modalities API Details /architecture/input_modalities Array · See Items	Array · See Items
Architecture · Output Modalities API Details /architecture/output_modalities Array · See Items	Array · See Items
Benchmarks API Details /benchmarks Object · See Fields	Object · See Fields
Benchmarks · Artificial Analysis API Details /benchmarks/artificial_analysis Object · See Fields	Object · See Fields
Benchmarks · Design Arena API Details /benchmarks/design_arena Array · See Items	Array · See Items
Default Parameters API Details /default_parameters Object · See Fields	Object · See Fields
Links API Details /links Object · See Fields	Object · See Fields
Pricing API Details /pricing Object · See Fields	Object · See Fields
Reasoning API Details /reasoning Object · See Fields	Object · See Fields
Reasoning · Supported Efforts API Details /reasoning/supported_efforts Array · See Items	Array · See Items
Supported Parameters API Details /supported_parameters Array · See Items	Array · See Items
Top Provider API Details /top_provider Object · See Fields	Object · See Fields

Architecture · Input Modalities

3 items · source order preserved

text
image
video

API Details

Item	/architecture/input_modalities/*
1	text
2	image
3	video

Architecture · Output Modalities

1 items · source order preserved

text

API Details

Item	/architecture/output_modalities/*
1	text

Supported Parameters

18 items · source order preserved

frequency_penalty
include_reasoning
logprobs
max_tokens
presence_penalty
reasoning
reasoning_effort
repetition_penalty
response_format
seed
stop
structured_outputs
temperature
tool_choice
tools
top_k
top_logprobs
top_p

API Details

Item	/supported_parameters/*
1	frequency_penalty
2	include_reasoning
3	logprobs
4	max_tokens
5	presence_penalty
6	reasoning
7	reasoning_effort
8	repetition_penalty
9	response_format
10	seed
11	stop
12	structured_outputs
13	temperature
14	tool_choice
15	tools
16	top_k
17	top_logprobs
18	top_p

Benchmarks · Design Arena

8 items · source order preserved

Item	Arena	Category	Elo	Rank	Win Rate
1	models	3d	1128	78	40.5
2	models	asciiart	1154	42	44.9
3	models	codecategories	1184	64	42.4
4	models	dataviz	1174	67	42.9
5	models	gamedev	1161	69	38.6
6	models	svg	1082	64	37.3
7	models	uicomponent	1182	63	42.1
8	models	website	1198	61	44

API Details

Item	/benchmarks/design_arena/*/arena	/benchmarks/design_arena/*/category	/benchmarks/design_arena/*/elo	/benchmarks/design_arena/*/rank	/benchmarks/design_arena/*/win_rate
1	models	3d	1128	78	40.5
2	models	asciiart	1154	42	44.9
3	models	codecategories	1184	64	42.4
4	models	dataviz	1174	67	42.9
5	models	gamedev	1161	69	38.6
6	models	svg	1082	64	37.3
7	models	uicomponent	1182	63	42.1
8	models	website	1198	61	44

Reasoning · Supported Efforts

3 items · source order preserved

high
medium
low

API Details

Item	/reasoning/supported_efforts/*
1	high
2	medium
3	low

Recorded Value History

Historical API Field

Input Price · USD/Token

5 of 5 records plotted · 0 excluded for missing or invalid coordinates.

Up to 100 recorded versions, spaced by observation order rather than elapsed time. Array fields use the minimum numeric item in each version. Missing values are omitted. Select a point to open its archived snapshot; comparison actions use the current listing. History begins at the first recorded baseline.

Axis Scale

Select a point to open its listing or add it to compare.

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