Fastest StepFun Models

Quick answer · Updated June 2026

The fastest StepFun model is Step 3.7 Flash at 92 output tokens per second. Step 3.5 Flash (47 t/s) is next.

92 t/sSpeed

42.6Intelligence

$0.200Input /M

256KContext

AI models ranked by output speed (tokens per second, p50). The fastest large language models for low-latency and high-throughput applications.

1S
step-3.7-flash
ReasoningToolsJSON+142.6 intel · $0.200/M · 1.4s ttft
92 t/s
Speed
2S
step-3.5-flash
ReasoningToolsJSON37.8 intel · $0.090/M · 450ms ttft
47 t/s
Speed

Frequently asked

What is the fastest StepFun model?

The fastest StepFun model is Step 3.7 Flash at 92 output tokens per second. Step 3.5 Flash (47 t/s) is next.

What's a good alternative to Step 3.7 Flash?

Step 3.5 Flash (47 t/s) is the closest alternative on this metric. See the full ranking above for the tradeoffs.

How many StepFun models are there?

modelgrep tracks 2 StepFun models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by Step 3.7 Flash. 2 of them qualify for this ranking.

More StepFun rankings

StepFun: Smartest LLMs StepFun: Best LLMs for Coding StepFun: Best LLMs for Design & Frontend StepFun: Lowest-Latency LLMs StepFun: Cheapest LLMs StepFun: Best Free LLMs StepFun: Best Reasoning LLMs StepFun: Best Vision LLMs StepFun: Best LLMs for Agents StepFun: Best Open-Source LLMs StepFun: Longest-Context LLMs

All rankings

Small & Fast LLMs Smartest LLMs Best LLMs for Coding Best LLMs for Design & Frontend Lowest-Latency LLMs Cheapest LLMs Best Free LLMs Best Reasoning LLMs Best Vision LLMs Best LLMs for Agents Best Open-Source LLMs Longest-Context LLMs