Models

Step 5 Preview

A 600B-parameter Mixture-of-Experts language model for agentic work, now released as open weights.

1 story, first covered on Oct 23, 2026.

Every story about Step 5 Preview (1)

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New modelsStepFun Releases Open Weights for Its 600B Step 5 Preview ModelHerald of AI

StepFun Releases Open Weights for Its 600B Step 5 Preview Model

The Chinese AI lab has made its large Mixture-of-Experts model available for self-hosting, targeting developers building coding agents and finance tools.

Oct 23, 2026