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  1. Home/
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  3. StepFun
StepFun

StepFun: every model, side by side

Builds the Step family of language and multimodal models for reasoning and agent tasks.

Compare StepFun models
Total models
1
Text models
1
Active period
Oct 2026 to Oct 2026

StepFun models and answers

Models1Responses2

  • Step 5 Preview

    Oct 2026

    StepFun’s reasoning model for coding and long-running agent tasks. Its mixture-of-experts architecture activates 27B of 600B parameters and accepts text, images and video across a one-million-token context.

    conversation · reasoning · code-generation · analysis · function-calling

Model evolution

One challenge, every StepFun generation.

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Rival
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Explore all of Rival

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  • Compare models
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  • Best AI for...
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Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model updates
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  • AI creators

Connect

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