Step 3.8 Flash release date
ForecastStepFunlanguage model
Step 3.8 Flash has not been announced. Based on how often StepFun ships new versions, our forecast is that it arrives around November 26, 2026, probably between October 30, 2026 and February 6, 2027.
The forecast
| Most likely | November 26, 2026 |
|---|---|
| Window | October 30, 2026 to February 6, 2027 |
| Chance it arrives in that window | About 30% |
| Follows | Step 3.7 Flash (out May 28, 2026) |
| Based on | 1 earlier gap between versions |
How we got this
StepFun is the maker of Step 3.7 Flash. We look at the gaps between its earlier versions (Step 3.5 Flash, 2026-01-29; Step 3.7 Flash, 2026-05-28) and project the next one. It is a guess from a pattern, not news: the maker has not said Step 3.8 Flash exists. This page turns into the launch page, with price and facts, as soon as the model shows up on OpenRouter, Hugging Face or GitHub.
Available now from StepFun
Step 5StepFun · language model
Oct 8, 2026released
Step 3.7 FlashStepFun · language model
May 28, 2026released
Step 3.5 FlashStepFun · language model
Jan 29, 2026released
Predicted automatically by Modelcast. Not affiliated with StepFun.