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Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

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Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#31

I wish that all announcements of models would show what (consumer) hardware you can run this on today, costs and tok/s.

Qwen3.5-27B with a 4bit quant can be run on a 24G card with no problem. With 2 Nvidia L4 cards and some additional vllm flags, i am serving 10 developers at 20-25tok/sek, off-peak is around 40tok/sek. Developers are ok with that performance, but ofc they requested more GPU's for added throughput.

Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#32

I wish that all announcements of models would show what (consumer) hardware you can run this on today, costs and tok/s.

As this is a dense model and it's pretty sizable, 4-bit quantization can be nearly lossless. With that, you can run this on a 3090/4090/5090. You can probably even go FP8 with 5090 (though there will be tradeoffs). Probably ~70 tok/s on a 5090 and roughly half that on a 4090/3090. With speculative decoding, you can get even faster (2-3x I'd say). Pretty amazing what you can get locally.

Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#33
post #2

A bit skeptical about a 27B model comparable to opus...

you'd be surprised how good small models have gotten. Size of the model isnt all that matters.

> Size of the model isnt all that matters.

What matters is the motion in the tokens

Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#34

Good news! Friendly reminder: wait a couple weeks to judge the ”final” quality of these free models. Many of them suffer from hidden bugs when connected to an inference backend or bad configs that slow them down. The dev community usually takes a week or two to find the most glaring issues. Some of them may require patches to tools like llama.cpp, and some require users to avoid specific default options. Gemma 4 had…

Good advice for all new LLM experimenters.

The bugs come from the downstream implementations and quantizations (which inherit bugs in the tools).

Expect to update your tools and redownload the quants multiple times over 2-4 weeks. There is a mad rush to be first to release quants and first to submit PRs to the popular tools, but the output is often not tested much before uploading.

If you experiment with these on launch week, you are the tester. :)

Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#36
post #32

I wish that all announcements of models would show what (consumer) hardware you can run this on today, costs and tok/s.

As this is a dense model and it's pretty sizable, 4-bit quantization can be nearly lossless. With that, you can run this on a 3090/4090/5090. You can probably even go FP8 with 5090 (though there will be tradeoffs). Probably ~70 tok/s on a 5090 and roughly half that on a 4090/3090. With speculative decoding, you can get even faster (2-3x I'd say). Pretty amazing what you can get locally.

That seems awfully speculative without at least some anecdata to back it up.

Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#37

Good news! Friendly reminder: wait a couple weeks to judge the ”final” quality of these free models. Many of them suffer from hidden bugs when connected to an inference backend or bad configs that slow them down. The dev community usually takes a week or two to find the most glaring issues. Some of them may require patches to tools like llama.cpp, and some require users to avoid specific default options. Gemma 4 had…

This is probably less likely with this model, as it’s almost certainly a further RL training continuation of 3.5 27b. The bugs with this architecture were worked out when that dropped.

Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#38
Generate an SVG of a pelican riding a bicycle: https://codepen.io/chdskndyq11546/pen/yyaWGJx

Generate an SVG of a dragon eating a hotdog while driving a car: https://codepen.io/chdskndyq11546/pen/xbENmgK

Far from perfect, but it really shows how powerful these models can get

Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#39

I wish that all announcements of models would show what (consumer) hardware you can run this on today, costs and tok/s.

Divide the value before the B by 2, and there's your answer if you get a Q4_K_M quant. Plus a bit of room for KV cache.

TLDR: If you have 14GB of VRAM, you can try out this model with a 4-bit quant.

Tokens per second is an unreasonable ask since every card is different, are you using GGUF or not, CUDA or ROCm or Vulkan or MLX, what optimizations are in your version of your inference software, flags are you running, etc.

Note that it's a dense model (the Qwen models have another value at the end of the MoE model names, e.g. A3B) so it will not run very well in RAM, whereas with a MoE model, you can spill over into RAM if you don't have enough VRAM, and still have reasonable performance.

Using these models requires some technical know-how, and there's no getting around that.

Re: Qwen3.6-27B: Flagship-Level Coding in a 27B Dense Model

#40
post #2

A bit skeptical about a 27B model comparable to opus...

You should be skeptical. Benchmark racing is the current meta game in open weight LLMs.

Every release is accompanied by claims of being as good as Sonnet or Opus, but when I try them (even hosted full weights) they’re far from it.

Impressive for the size, though!

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