Step 3.7 Flash stays because it is on the week board: 857B (−30% week-over-week, not share). Step 3.5 Flash is the live second card. Official Apache-2.0 weights.
OpenRouter This Week LLM Leaderboard tokens (prompt plus completion) through 18 Aug 2026: 857B on Step 3.7 Flash (−30% week-over-week, not share). Fetched 2026-08-19. OpenRouter This Week tokens are prompt plus completion. The percent next to a row is week-over-week change, not share of the week. Market share on this page is text request share by author, a different number.
857B this week (−30% WoW). HF stepfun-ai/Step-3.7-Flash.
Previous Flash. Official HF stepfun-ai/Step-3.5-Flash. Different OR invoice than 3.7.
Open Apache-2.0 weights. AA 31. −30% WoW volume.
Previous Flash. Apache-2.0. AA 27. Same OR pair as 3.7.
This hub lists every published card. Start with Step 3.7 Flash.
Ranked view: Best coding models: the independent leaderboard puts every StepFun card with an independent coding row next to every other lab on one board, with the confidence intervals left visible.
The app is free with your own keys. Plus adds Continuum-hosted inference and the ids we actually list on each card.