Small & Fast StepFun Models

Quick answer · Updated June 2026

The small, fast StepFun model is Step 3.7 Flash — the efficient tier at 92 tokens/sec and $0.200 per million input tokens. It trades a few points of raw intelligence for speed and cost, the right call for high-volume, latency-sensitive work. Step 3.5 Flash (47 t/s) is next.

92 t/sSpeed

42.6Intelligence

$0.200Input /M

256KContext

Compact, efficient models — the small/mini/flash/haiku tier — ranked by output speed. These trade a little raw intelligence for low cost and high throughput, which is the right tradeoff for chat, classification, extraction and other high-volume work.

Frequently asked

What is the smallest, fastest StepFun model?

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: Fastest LLMs 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 Fastest LLMs 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