The trending crown just went to a model that opens in five days. stepfun's step 5 preview hit the…
the trending crown just went to a model that opens in five days. stepfun's step 5 preview hit the top of openrouter's trending board on oct 10, and the company says full weights land oct 15.
the open frontier just scheduled its own launch.
Context
StepFun's Step 5 Preview topped OpenRouter's Trending list around Oct 10, 2026 and ranked second on the daily list, per AI News Feed citing Leiphone and The Yangtzeer. An open-source release is scheduled for Oct 15.
OpenRouter describes it as a sparse Mixture-of-Experts model for agentic work with 27B active and 600B total parameters. Magica reports pricing of $1 per million input tokens and $2.70 for output.
The top of Trending, the Oct 10 date and the Oct 15 open release match AI News Feed. 'Full weights' on Oct 15 is the post's wording; the source says open-source release. The post is accurate that the date is five days out from Oct 10.
'the open frontier just scheduled its own launch' is the author's opinion.
Related work
- OpenRouter: Step 5 Preview ↗Model page.
- AI News Feed: Step 5 Preview tops OpenRouter Trending ↗Trending and release date.
- Magica: StepFun Step 5 on OpenRouter ↗Pricing.
Watch next
- Check the Oct 15 release for the license terms.
Sources
- OpenRouter, Step 5 Previewopenrouter.ai
- AI News Feed, Oct 10, 2026ainewsfeed.tech
- The Yangtzeer, Oct 10, 2026yangtzeer.com
Provenance
The note above is reproduced unedited from the original post, first published on Threads on 11 October 2026 at 04:17 IST. Sources are the papers and datasets the note draws on.
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