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Simon Willison

@simonwillison.net

1.4k Following50.9k Followers

Independent AI researcher, creator of datasette.io and llm.datasette.io, building open source tools for data journalism, writing about a lot of stuff at https://simonwillison.net/

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@simonwillison.netOct 12, 2026, 1:13 AM

Here's the Daily Show coverage www.tiktok.com/@thedailysho...

@simonwillison.netOct 12, 2026, 1:11 AM

Found the YouTube music video by that pizza chain guy who was bribing Kimberley Guilfoyle to lobby the IRS and send his song to Kid Rock youtu.be/2B6uBfh7bjc

Screenshot of YouTube video player with the comments panel open. The paused video shows a mustached man in a black cowboy hat and black vest with a sheriff's star badge, seated at a wooden table. "Comments" shows one comment from @r.g.carter3908, 2d ago: "i don't know,  seems easier to just pay your taxes then to make what ever this is." The comment has 6 likes.
@simonwillison.netOct 9, 2026, 1:18 PM

Example prompt:

Um, they do not. Um, this is going to be a new type of content. Um, it’s not going to show up... Oh, hold on. Yeah, no- I do not want this to show up in my, um, tag pages and date archive pages and... Actually, no, I think... I don’t want it on the tag pages. I don’t want it on the, um, blog index page. But I think I do want it to show up on the date-based pages. You know, if you navigate to September the 19th, and I sent a newsletter on that page, I think I want that to show up. So... this is- so I think we probably need a new model. The other thing is that I want them searchable, uh the Substack ones are not searchable, because those are actually just copies of other s- on content on my blog. These monthly ones do contain unique content, and spe- and once they’re... published, like once they’re made public a month after they’ve gone out, I want them to show up on my search results.
@simonwillison.netOct 9, 2026, 1:16 PM

I built a new feature for my blog entirely by voice with Codex Desktop, while I was cooking dinner simonwillison.net/2026/Oct/9/b...

@simonwillison.netOct 7, 2026, 9:00 PM

Haiku 5.5 is SO MUCH better at drawing pelicans riding bicycles than Claude Haiku 4.5, released almost a year ago and costing 10x more. Here's Haiku 4.5's attempt:

The bicycle is two wheels joined by an A-frame. The pelican looks more like a small brown duck with a pink bill. It's a terrible attempt at a pelican riding a bicycle.
@simonwillison.netOct 7, 2026, 8:58 PM

Pelicans and a bunch of notes on the pricing of the new Claude Haiku 5.5 simonwillison.net/2026/Oct/7/c...

@simonwillison.netOct 7, 2026, 12:32 AM

I released an LLM plugin for sending prompts to OpenAI's new Jev-clone decision model that's based on GPT-6 Luna simonwillison.net/2026/Oct/6/l...

@simonwillison.netOct 5, 2026, 10:20 PM

I vaguely remember that! I liked being able to navigate between lines easier using the keyboard h

@simonwillison.netOct 5, 2026, 10:07 PM

Oh no... I think the default answer may differ if you are talking about disks or RAM!

@jacob.goldOct 5, 2026, 10:03 PMReposted by @simonwillison.net

I've called this the 'The Kobayashi Maru' interview question for programmers. There's no "right" answer only painful trade-offs which makes it very revealing.

@simonwillison.netOct 5, 2026, 9:53 PM

I need to decide if 1KB means 1,000 bytes or 1,024 bytes in all of my software I was leaning 1,024 but it looks like macOS and Windows both define KB as 1,000 these days I want whatever people are most likely to understand (I do not think most people know what KiB or MiB means)

@simonwillison.netOct 5, 2026, 5:42 PM

Do you think there's any chance at all someone deep within Apple might reconsider and mark it as not-deprecated? To use a Claude-ism it's increasingly "load-bearing" these days

@simonwillison.netOct 3, 2026, 11:35 PM

Just published this post about how we’re going to need default hard budget caps on pretty much everything simonwillison.net/2026/Oct/3/d...

@simonwillison.netOct 3, 2026, 6:22 PM

Do you think it makes sense to coach them in learning how to build interactive prototypes?

@simonwillison.netOct 3, 2026, 5:21 PM

I mean yeah, this is a stupid way to add numbers I did run this on a computer on my desk at home though, so it's not a great example of wildly irresponsible power usage

@simonwillison.netOct 3, 2026, 1:31 PM

Help me understand why that is

@simonwillison.netOct 3, 2026, 5:11 AM

Is your distrust of reasoning traces based on the fact that the proprietary vendors deliberately obfuscate theirs and turn them into summaries? The open weight models make it much more clear what's actually going on

@simonwillison.netOct 3, 2026, 5:05 AM

Have you seen how reasoning levels for Qwen actually work? It's pretty funny, the level you select gets used to dynamically assemble a system prompt effectively telling it to "think carefully" huggingface.co/Qwen/Qwen3.8...

{%- if resolved_reasoning_effort == 'xhigh' %}
        {%- set reasoning_instructions = 'Reasoning effort is set to xhigh. Please think carefully through the task, validate key assumptions, consider plausible alternatives, and prioritize correctness, consistency, and clarity in the final answer.' %}
    {%- elif resolved_reasoning_effort == 'low' %}
        {%- set reasoning_instructions = 'Reasoning effort is set to low. Keep your thinking brief and focused, moving directly to the conclusion without unnecessary elaboration.' %}
    {%- endif %}
@simonwillison.netOct 3, 2026, 4:57 AM

Honestly not sure if there's something we disagree on here

@simonwillison.netOct 3, 2026, 4:54 AM

Sure. Still works though.

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