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

qwen.ai

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

#21
post #4

Earlier quoted context omitted.

My experience with qwen-3.6:35B-A3B reinforces this, gonna give this a spin when unsloth has quants available Gemini flash was just as good as pro for most tasks with good prompts, tools, and context. Gemma 4 was nearly as good as flash and Qwen 3.6 appears to be even better.

> when unsloth has quants available https://huggingface.co/unsloth/Qwen3.6-27B-GGUF

That was quick (compared to the 1T Kimi-2.6, not surprising)

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

#23

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

The 27B model they release directly would require significant hardware to run natively at 16-bit: A Mac or Strix Halo 128GB system, multiple high memory consumer GPUs, or an RTX 6000 workstation card.

This is why they don’t advertise which consumer hardware it can run on: Their direct release that delivers these results cannot fit on your average consumer system.

Most consumers don’t run the model they release directly. They run a quantized model that uses a lower number of bits per weight.

The quantizations come with tradeoffs. You will not get the exact results they advertise using a quantized version, but you can fit it on smaller hardware.

The previous 27B Qwen3.5 model had reasonable performance down to Q5 or Q4 depending on your threshold for quality loss. This was usable on a unified memory system (Mac, Strix Halo) with 32GB of extra RAM, so generally a 64GB Mac. They could also be run on an nVidia 5090 with 32GB RAM or a pair of 16GB or 24GB GPUs, which would not run as fast due to the split.

Watch out for some of the claims about running these models on iPhones or smaller systems. You can use a lot of tricks and heavy quantization to run it on very small systems but the quality of output will not be usable. There is a trend of posting “I ran this model and this small hardware” repos for social media bragging rights but the output isn’t actually good.

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

#24
post #7
post #2

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

Some of these benchmarks are supposedly easy to game. Which ones should we pay attention to?

ARC-AGI 2

GLM 5 scores 5% on the semi-private set, compared to SOTA models which hover around 80%.

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

#26

Earlier quoted context omitted.

depends on format, compute type, quantization and kv cache size.

Specs for whatever they used to achieve the benchmarks would be a good start.

The benchmarks are from the unquantized model they release.

This will only run on server hardware, some workstation GPUs, or some 128GB unified memory systems.

It’s a situation where if you have to ask, you can’t run the exact model they released. You have to wait for quantizations to smaller sizes, which come in a lot of varieties and have quality tradeoffs.

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

#27

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

I get ~5 tokens/s on an M4 with 32G of RAM, using:

  llama-server \
   -hf unsloth/Qwen3.6-27B-GGUF:Q4_K_M \
   --no-mmproj \
   --fit on \
   -np 1 \
   -c 65536 \
   --cache-ram 4096 -ctxcp 2 \
   --jinja \
   --temp 0.6 \
   --top-p 0.95 \
   --top-k 20 \
   --min-p 0.0 \
   --presence-penalty 0.0 \
   --repeat-penalty 1.0 \
   --reasoning on \
   --chat-template-kwargs '{"preserve_thinking": true}'
35B-A3B model is at ~25 t/s. For comparison, on an A100 (~RTX 3090 with more memory) they fare respectively at 41 t/s and 97 t/s.

I haven't tested the 27B model yet, but 35B-A3B often gets off rails after 15k-20k tokens of context. You can have it to do basic things reliably, but certainly not at the level of "frontier" models.

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

#28
post #12

This is getting very close to fit a single 3090 with 24gb VRAM :)

Yup! Smaller quants will fit within 24GB but they might sacrifice context length. I’m excited to try out the MLX version to see if 32GB of memory from a Pro M-series Mac can get some acceptable tok/s with longer context. HuggingFace has uploaded some MLX versions already.

32GB RAM on mac also need to host OS, software, and other stuff. There may not even be 24GB VRAM left for the model.

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

#29

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

Fwiw, huggingface does this on the page where you download the weights. Slightly different format though - you put all the hardware you have, and it shows which quants you can run.

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

#30

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

These might help if the provider doesn't offer the same details themselves. Of course, we have to wait for the newly released models to get added to these sites.

https://llmfit.io/

https://modelfit.io/

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