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Qwen 3.8 Flash Next model shows significant performance gains on consumer hardware

Users are reporting impressive performance gains with the Qwen 3.8 Flash Next model, particularly when utilizing the Basalt inference engine. One user on Reddit achieved significantly faster prefill speeds and better quality than previous models by switching to Basalt on a Linux system, ditching Windows due to its higher resource consumption. Another user demonstrated that the Qwen 3.8 Flash Next model can run at a sustained 22 tokens/second on more modest hardware, an RTX 3060 with 12GB VRAM and 16GB RAM, by developing a new fork of llama.cpp called Betelgeuse that optimizes expert routing and VRAM usage without sacrificing output quality. AI

IMPACT Demonstrates that significant performance improvements are achievable on consumer hardware with optimized inference engines and model configurations.

RANK_REASON User-developed optimizations and performance reports for an existing model.

Read on r/LocalLLaMA →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Qwen 3.8 Flash Next model shows significant performance gains on consumer hardware

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
User-developed optimizations and performance reports for an existing model.
Source corroboration
2 independent sources
Multiple independent publishers reporting the same story raises confidence that it's real and newsworthy.
Topics
model release, infra
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
3 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [2]

  1. r/LocalLLaMA TIER_1 English(EN) · /u/Rozzemak ·

    Qwen 3.8 Flash Next NVFP4 on 64gb RAM and 5090, Basalt. Ditched windows for it. Very hyped for qwen 4 model family now.

    <table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1xlicia/qwen_38_flash_next_nvfp4_on_64gb_ram_and_5090/"> <img alt="Qwen 3.8 Flash Next NVFP4 on 64gb RAM and 5090, Basalt. Ditched windows for it. Very hyped for qwen 4 model family now." src="https://external…

  2. r/LocalLLaMA TIER_1 English(EN) · /u/zyxciss ·

    Betelgeuse: Running Qwen 3.8 Flash Next at 22 tok/s sustained (spiking to 48 tok/s) on an RTX 3060 12GB + 16GB DDR4 RAM 100% bit-exact!

    <table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1xk8s6z/betelgeuse_running_qwen_38_flash_next_at_22_toks/"> <img alt="Betelgeuse: Running Qwen 3.8 Flash Next at 22 tok/s sustained (spiking to 48 tok/s) on an RTX 3060 12GB + 16GB DDR4 RAM 100% bit-exact!" sr…