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Physix Frontier · News Briefing Card (Leiphone · Oct 12, 2026)

Step 5 Preview Lands on Tencent WorkBuddy, Free for Two Weeks

KEY FACTS

  • On October 12, Tencent WorkBuddy integrated StepFun's flagship model Step 5 Preview.
  • The model is exclusively free on WorkBuddy for a limited two-week period.
  • Step 5 Preview uses a sparse MoE architecture with 600 billion total parameters.
  • The model activates about 27 billion parameters per token and is optimized for scenarios such as coding and finance.
  • According to the Artificial Analysis leaderboard, its composite intelligence index is 44, ranking in the global open-source top three.

KEY DATA

600 billionTotal Parameters
about 27 billionActivated Parameters per Token
44Composite Intelligence Index
2 weeksFree Period

PHYSIX OBSERVATION

StepFun is trading Tencent's office entry point for real-world scenario data, and a two-week free period is a classic low-cost customer acquisition play. For users, getting a flagship model for free to handle documents and data analysis is worth a try; but once a model maker binds itself to a big-tech workbench, its bargaining room for an independent entry point gets squeezed, and the subsequent pricing cadence is the key signal to watch.

Source: Leiphone report