Qwen 3.8 Flash Next, DeepSeekV4 Flash and Time

Reddit r/LocalLLaMA News

Summary

A user with a 128GB Mac Studio M1 Ultra compares running Qwen 3.8 Flash Next versus DeepSeek V4 locally, noting that Flash Next benchmarks higher but takes dramatically longer per task, questioning the practical tradeoff between quality and speed.

MacStudio 128GB M1 ultra I'm curious how people who can run both models are deciding which one to work with. DeepSeekv4 benchmarks right below GPT 5.5 high. Flash Next benchmarks right above 5.4/5.5 xhigh Both seem capable but it seems like Qwen 3.8 Flash next is taking much longer to actually finish anything. From the chart, it seems like I can do 5 tasks with DeepSeekv4 in the time it takes to do 1 with Qwen 3.8 Flash Next and Flash Next isn't 5x better than DeepSeekv4. In my personal experience it may not be 5x longer but it's absolutely taking signifcantly longer to do anything. Is there something I'm missing? NOTE: I'm not bashing Qwen 3.8 flash next, I like it, currently 2h and 5 minutes into deep diving on some work for me. On my hardware I can load one of these models with multiple slots so I have to choose. I'll likely have to invest the time into a more deterministic benchmarking on my personal tasks to compare the quality I'm getting back and I'll still be using 3.8 27b because I find it capable and it uses less of my machine so I can do more other things like the image gen I'm working to integrate into my personal harness.
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