Step 3.7 Flash
StepFunOpen WeightApache 2.0 · Commercial OK
Description
Step 3.7 Flash is an open-source multimodal reasoning model by StepFun with 198B total parameters (11B active) using Mixture of Experts. It accepts text and image inputs and features a 256K context window, selectable reasoning effort, tool calling, and agentic capabilities for coding and search workflows, scoring 80.9% on GPQA Diamond and 56.3% on SWE-bench Pro.
Release Date
2026-05-29
Parameters
198.0B
Context Length
256K
Modalities
image, text, video
Capability Radar
20
general
40
coding
81
reasoning
56
science
60
agents
90
multimodal
Rankings
| Domain | #Rank | Score | Source |
|---|---|---|---|
| Code Ranking | 171 | 59.0 | AA |
| General Ranking | 120 | 59.0 | AA |
| Science | 149 | 59.0 | AA |
Benchmark Scores (LLM Stats)
(LLM Stats (zeroeval))General
GDPval
45.8%SR
Reasoning
Terminal-Bench 2.1
59.5%SR
SWE-Bench ProPrinceton NLP (2024)
56.3%SR
Humanity's Last Exam (with tools, text-only)
47.2%SR
AA Evaluation Indices
(Artificial Analysis)Tau2(Sierra + U Toronto + Vector Institute (2025))98.5
Gpqa(NYU + Cohere + Anthropic (2023))80.9
Lcr(Artificial Analysis)73.7
Ifbench(Google Research (2023))67.3
Scicode(UIUC + Argonne National Lab (2024))43.9
Coding Index(Artificial Analysis)39.6
Terminalbench V2 139.3
Terminalbench Hard(Stanford × Laude Institute (2026))35.6
Hle(Center for AI Safety + Scale AI (2025))21.4
Intelligence Index(Artificial Analysis)19.5
Tau Banking12.0
LLM Stats Category Scores
(LLM Stats (zeroeval))Code60
Tool Calling60
Legal50
Math50
Reasoning50
Finance50
General50
Agents50
Pricing
Input Price$0.2 / 1M tokens
Output Price$1.15 / 1M tokens
Blended Price (3:1)$0.438 / 1M tokens
Cache Read Price$0.04035 / 1M tokens
Speed
Tokens/sec0.0
Time to First Token0.00s
Time to Answer0.00s
Provider Price Ranking
Provider Price Ranking
14 providers
Cheapest: DeepInfraMost Expensive: Kenari
ProviderInputOutput
1DeepInfraCheapest
$0
$0
2StepFunPRIMARY
$0.2
$1.15
3OpenRouter
$0.2
$1.15
4ZenMux
$0.2
$1.15
5Novita AI
$0.2
$1.15
6Kilo Gateway
$0.2
$1.15
7Requesty
$0.2
$1.15
8Vercel AI Gateway
$0.2
$1.15
9DevPass (LLM Gateway)
$0.2
$1.15
10StepFun (Global)
$0.2
$1.15
11EmpirioLabs AI
$0.2
$1.15
12StepFun (China)
$0.20175
$1.21052
13AIHubMix
$0.22
$1.32
14Kenari
$0.24
$1.37143
Compare pricing across different API providers for this model.