Alibaba's Qwen Team Previews Qwen4 Architecture with Upcoming Open-Source Qwen3.8-Flash-Next

On August 25, Alibaba's Qwen team announced via ModelScope that its next-generation architecture, Qwen4, is ready, kicking off the countdown to the release of the open-source model Qwen3.8-Flash-Next, which officially launched the following day (August 26). The community widely sees the move as a prelude to the formal debut of the Qwen4 series.

Confirmed

• Qwen3.8-Flash-Next was officially announced as open-source, releasing the day after the announcement
• The model features an open-weight multimodal mixture-of-experts (MoE) design
• It has a total of 125 billion parameters, including 51 billion N-gram parameters, with only 6 billion activated per token
• The model is built on the next-generation architecture that will underpin the upcoming Qwen4 series

Why it matters

• According to @calabiandyau, this move effectively lets developers get early hands-on experience with the architectural improvements of the Qwen4 family, marking another major update to the Qwen lineup
• @rohanpaulai noted that the design of a large total parameter count paired with low active parameters aims for high-performance inference efficiency; if it delivers, it could become a new cost-effective option among open-source models
• N-gram parameters are a configuration rarely seen in mainstream open-source models; community members including @zephyrz9 have expressed interest in this architectural detail, though its exact role remains to be verified after release

2026-08-25 ~ 2026-08-25 · 6 related posts

• [source] Alibaba Teases Qwen4 Architecture, Announces Open Source Qwen3.8-Flash-Next — bclavie · 2026-08-25
• [source] Qwen 3.8 Flash Next releasing: 125B params with 51B N-gram — zephyr_z9 · 2026-08-25
• Qwen Announces Qwen3.8-Flash-Next Open Source Release — cedric_chee · 2026-08-25
• Alibaba's Qwen3.8-Flash-Next releasing tomorrow with Qwen4 MoE architecture — rohanpaul_ai · 2026-08-25
• Alibaba to open-source Qwen3.8-Flash-Next, first look at architecture powering Qwen4 — calabi_and_yau · 2026-08-25
• Alibaba Qwen4 architecture preview coming August 26 — NielsRogge · 2026-08-25