Dev Radar
Support
LiveUpdated 2026-09-20 22:16 UTC

Step 5 Preview is live: 600B total parameters, 27B active per token, vision input and a…

Step 5 Preview is live: 600B total parameters, 27B active per token, vision input and a 1M-token context window. But…

This is a dev post classified by Jev as Open source & devtools business (a launch), kept by the Dev Radar because it carries real work, not commentary.

Step 5 Preview is live: 600B total parameters, 27B active per token, vision input and a 1M-token context window. But one detail matters: the model is available now, while open weights are only promised for October 15. We separated what ships today from what still needs proof, including API pricing, long-context testing and the future license. https://musthave.ai/step-5-preview-600b-1m-context-open-weights/ #AI #LLM #StepFun #OpenSourceAI

Posted by Abdessalam Alaoui (4.3k followers) 2 h ago · 0 likes · 15 views · view the original post on X. Kept by the Dev Radar as Open source & devtools business.

More dev work like this

Every post is read and classified by Jev (TypeSafe): what it is, which market it belongs to, and whether the link is a real tool. 17k posts from 4.9k X accounts over the last 21 days, 1.9k tools, 12 markets. Collected every 5 minutes, fully re-ranked every hour — last update 2026-09-20 22:16 UTC. Full method.