Longest-Context StepFun Models

Quick answer · Updated June 2026

Step 3.5 Flash has the largest context window of any StepFun model, at 262K tokens. Step 3.7 Flash (256K) is next.

262KContext

37.8Intelligence

47 t/sSpeed

$0.090Input /M

AI models with the largest context windows, ranked by token capacity. The best large language models for long documents, codebases and extended conversations.

1S
step-3.5-flash
ReasoningToolsJSON37.8 intel · $0.090/M · 47 t/s
262K
Context
2S
step-3.7-flash
ReasoningToolsJSON+142.6 intel · $0.200/M · 92 t/s
256K
Context

Frequently asked

Which StepFun model has the largest context window?

Step 3.5 Flash has the largest context window of any StepFun model, at 262K tokens. Step 3.7 Flash (256K) is next.

What's a good alternative to Step 3.5 Flash?

Step 3.7 Flash (256K) 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

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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