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Qwen 3.8 27B is excellent, but it defaults to overthinking things

simonwillison.net

151–160 of 411 posts

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#151

Earlier quoted context omitted.

Yes. Bureaucracy for sure when I throw festivals. ChatGPT pulls permits for me. (I think that uses a lot of tokens because of the browser control?) Manages the admin side along with some tools I built in Lovable via mcp servers. Marketing definitely. My food truck side is relatively high volume and it manages my kitchen and warehouse side, basically generating all of the instructions my employees follow, managing and…

Thanks for the very detailed answer! Would you say ChatGPT does everything you need today or do you still see some gaps? i.e. things you think it should be able to do but currently doesn’t, or things that still take too much effort on your part to setup chatgpt to do it.

Huge gaps. I expect the tooling to get better for non-programmers. Codex and Cowork are great, but you still feel like you’re trying to hammer the square peg through the circle hole often when using it for non-programming tasks.

The AI is good enough to do a lot of tasks but the tooling just isn’t caught up to it yet.

I’d say it’s freed up ten hours a week of my time. And that’ll only improve.

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#152
post #82
post #74

Earlier quoted context omitted.

All these weird partial language thought patterns im surprised none of the teams have taught the models to think in something like court stenography or some very dense pattern (i mean they even tried caveman language at one point)

Keep in mind that the model is thinking in a token space, itself a compressive representation of language. (Note: there's still a huge grammar penalty, so, ugh do think small.)

It selects tokens but they expand to embedding vectors which are huge, also in memory and attention requirements, I think?

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#153
post #82
post #74

Earlier quoted context omitted.

All these weird partial language thought patterns im surprised none of the teams have taught the models to think in something like court stenography or some very dense pattern (i mean they even tried caveman language at one point)

Keep in mind that the model is thinking in a token space, itself a compressive representation of language. (Note: there's still a huge grammar penalty, so, ugh do think small.)

The real breakthrough is going to be thinking in latent space.

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#154
post #142

My comparison of its reasoning efforts[0] seems to show that it only really supports 3 modes: none, low, xhigh. Low and medium are basically the same. Also, the electricity it costs to run on a 3090 is not negligible, so that it's cheaper to use Luna high via API than Qwen 3.8 27b locally, hardware costs excluding. [0]: https://aibenchy.com/compare/qwen-qwen3-8-27b-high/qwen-qwen...

$0.286/kWh is a ridiculous amount of money to pay for power. That's more than double the regional residental average here! If I ever found myself in this situation I would much rather just rent cards from hotasile and run open models instead of giving OAI money and playing reset bingo

I removed the extra links to sources for the electricity prices, but that's the average cost in EU, where I live.

https://ec.europa.eu/eurostat/web/products-eurostat-news/w/d...

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#155
post #142

My comparison of its reasoning efforts[0] seems to show that it only really supports 3 modes: none, low, xhigh. Low and medium are basically the same. Also, the electricity it costs to run on a 3090 is not negligible, so that it's cheaper to use Luna high via API than Qwen 3.8 27b locally, hardware costs excluding. [0]: https://aibenchy.com/compare/qwen-qwen3-8-27b-high/qwen-qwen...

$0.286/kWh is a ridiculous amount of money to pay for power. That's more than double the regional residental average here! If I ever found myself in this situation I would much rather just rent cards from hotasile and run open models instead of giving OAI money and playing reset bingo

Also, note that the Luna was run and costs were calculated through OpenRouter, via API. With a ChatGPT subscription it's likely even cheaper.

Also, Qwen 3.7 27B is actually Terra level.

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#156

Earlier quoted context omitted.

Yes. Bureaucracy for sure when I throw festivals. ChatGPT pulls permits for me. (I think that uses a lot of tokens because of the browser control?) Manages the admin side along with some tools I built in Lovable via mcp servers. Marketing definitely. My food truck side is relatively high volume and it manages my kitchen and warehouse side, basically generating all of the instructions my employees follow, managing and…

Thanks for the very detailed answer! Would you say ChatGPT does everything you need today or do you still see some gaps? i.e. things you think it should be able to do but currently doesn’t, or things that still take too much effort on your part to setup chatgpt to do it.

Also, I have certainly gone down some unproductive rabbit holes figuring out what to do with it. Time spent on it is an investment, just like automating anything. You spend hours upfront to save them on an ongoing basis.

But, I think I’m on the black on it already after just a few months of heavy use. For instance I just tell it to book my dumpsters, bathrooms, sanitation crew, and security for X event. It goes and pulls event details, looks through my email to see who I get those from, and emails them relevant details, with no prompting.

Another good example: we launched a really fancy hot cocoa concept last fall that was a hit and I wanted to try to go to all of the local pumpkin patches in October and Christmas tree farms after Thanksgiving to serve when they have big crowds.

I asked it to contact all of the ones in my area and it sent out 70 emails and I booked several spots. It made me a nice database so I can see who followed up and who I need to reach out to again, etc. and it just gets those from my inbox.

Hours of my time saved with simple prompts. So while some things take awhile to pay off, some are instant.

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#157
post #142

My comparison of its reasoning efforts[0] seems to show that it only really supports 3 modes: none, low, xhigh. Low and medium are basically the same. Also, the electricity it costs to run on a 3090 is not negligible, so that it's cheaper to use Luna high via API than Qwen 3.8 27b locally, hardware costs excluding. [0]: https://aibenchy.com/compare/qwen-qwen3-8-27b-high/qwen-qwen...

$0.286/kWh is a ridiculous amount of money to pay for power. That's more than double the regional residental average here! If I ever found myself in this situation I would much rather just rent cards from hotasile and run open models instead of giving OAI money and playing reset bingo

Welcome to Europe

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#158
post #142

My comparison of its reasoning efforts[0] seems to show that it only really supports 3 modes: none, low, xhigh. Low and medium are basically the same. Also, the electricity it costs to run on a 3090 is not negligible, so that it's cheaper to use Luna high via API than Qwen 3.8 27b locally, hardware costs excluding. [0]: https://aibenchy.com/compare/qwen-qwen3-8-27b-high/qwen-qwen...

$0.286/kWh is a ridiculous amount of money to pay for power. That's more than double the regional residental average here! If I ever found myself in this situation I would much rather just rent cards from hotasile and run open models instead of giving OAI money and playing reset bingo

Ridiculous? Wow. I'm paying ~$0.4/kWh in western Europe...

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#159

Earlier quoted context omitted.

Unlike cloud infra in general which offers things like automatic backups, regional redundancy, and effectively unlimited scalability, it seems like the value proposition of cloud LLM gets ever shakier. * Many businesses don't need frontier level intelligence anyway. * It's completely stateless. If your local LLM machine catches fire? Nothing was lost. Buy another.

Centralized inference can easily increase batch size, leading to huge efficiency gains in the usual scenario where most users have just one or very few session. Using local resources efficiently requires some way to increase the batch size. I'm not sure if we are there yet.

I think the point is that if people are able to run inference on their laptops batch size efficiency won’t matter.

And before that, businesses will be able to get decent results with dedicated inference hardware.

Re: Qwen 3.8 27B is excellent, but it defaults to overthinking things

#160
post #20

It won't satisfy the people who just want to drop a model into their existing toolset and run, but I think there are a lot of ways to deal with this overthinking problem. For instance, it's a step backward, but I put {"reasoning_effort":"none"} and led it by the nose: User: We're going to make . Please create a plan, but do not write code yet. Agent: User: Now please follow that plan and write the code. No other chat…

I feel that local models are better for "processes" where you need a degree of predictability. Like summarising the daily weather for the family chat bot or analysing email inbox priority.

SOTA cloud models are more for open-ended tasks where you need "creativity".

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