simonw

Joined 19 years ago

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Oct 29
JSK Fellow 2020. Creator of Datasette, co-creator of Django. Co-founder of Lanyrd, YC Winter 2011.

https://simonwillison.net/ and https://til.simonwillison.net/

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Recent submissions

Comment · 2 hours ago
Given that I've shared almost every prompt I've used since I started publishing about this stuff over four years ago I think I've given people a better chance of replicating my results than pretty much anyone else writing about this space.

What did you have trouble replicating?

> Also, it is a different job and it will take some time to adjust. Can you blame them?

Not in the slightest. This stuff is really hard. The changes it makes to our production are disruptive and, in many cases, unwelcome.

Comment · 15 hours ago
That was the title of the Verge article I linked to: https://www.theverge.com/news/692015/anthropic-wins-a-major-...

And it supports my summary here. Anthropic did "win" on the fair use issue, but lost on the pirating.

Note that I said "The Bartz v. Anthropic settlement wasn't about fair use" - and that's accurate, the settlement aka the $1.5bn was about the pirated books, even though the initial lawsuit was about fair use.

Here's my later post about that settlement: https://simonwillison.net/2025/Sep/6/anthropic-settlement/

Comment · 15 hours ago
From that article:

> The New York Times’ lawsuit, meanwhile, asks everyone to ignore a half century of legal history and progress, and toss aside the longstanding principle of fair use in their own narrow pursuit of an undeserved payday.

The New York Times lawsuit isn't purely about training on content - it's about memorization. They included examples of OpenAI's models being able to reproduce NYT articles entirely from the weights.

There's also stuff about RAG in there - about OpenAI (and Microsoft) features that run web searches and then summarize the results. I've not been following developments closely, I'd be interested to know how that part of the lawsuit is shaking out so far.

Comment · 15 hours ago
Comment · 18 hours ago
The piece says:

> Code spitters are cooked, let's be honest here and accept the fate so everyone can move on.

I'm guessing "code spitters" here means people who consider their job to be manually writing code based on requirements produced by others.

Personally, I think the role of "developer" has already expanded way beyond that. If you're a technology expert who understands what is and is not possible to build, how it can be built, how to prompt that thing into existence, verify that the implementation is good, then get that implementation safely into production, you're not "cooked" at all.

Comment · 19 hours ago
I think they're making 0/month, spending VC.
Comment · 20 hours ago
Their argument seems to be that Fable 5/5.1 are smart enough to avoid being subverted in this way. I'm skeptical!
Comment · 21 hours ago
Related: this article was very unilkely make it to the Hacker News homepage thanks to the clickbait headline, but I recommend reading it anyway: https://twitter.com/jsnnsa/status/2115623382721126826

It describes a team spending 30x payroll on tokens - $3,000,000 in token spend per month - building a multiplayer game where incidents and bug reports from users are passed directly to Fable 5/5.1 agents who then act on them and deploy the changes to production.

"We consider it an outage if we don't ship every hour"

It's worth reading because it's either a complete disaster or a glimpse of the future, or quite possibly both.

Comment · 21 hours ago
It this point, a whole lot of teams have been leaning into AI-first, not-entirely-reviewed code since around March this year.

That means we are already 6-8 months in, and not far from having a full year of experience of what that actually looks like, albeit weirdly influenced by the increase in model capabilities during that period.

I'm looking forward to those retrospectives. Did this turn out to work OK for the teams doing it? What were the biggest failings and/or surprises? With hindsight, did this produce good quality software?

Comment · 21 hours ago
I expect Proton's existing employees may be a particularly bad audience for a "let the AI worry about security" message from the top, given that they are more likely to be a) security experts and b) people who care enough about security to actively seek out a job at Proton.
Comment · 23 hours ago
Sadly, I think the label "AI naïve" is better applied to the many experienced professionals who refuse to engage with AI systems as a matter of principle - or who tried out ChatGPT in 2024, saw it make howlingly obvious errors, and wrote off the entire category.

I frequently find myself in conversations with people who are resistant to AI and turn out to have a very skewed idea of what it can and cannot do.

Comment · 1 day ago
"According to a report by Fortune" - here's that report: https://fortune.com/2026/10/30/cisco-president-jeetu-patel-g...

Fortune's source was the CEO himself:

> “I’ve given him unlimited tokens because he’s going to refactor code,” Patel told Fortune at a small roundtable dinner. “So I’m like, you can go, you can go nuts.”

I think that Fortune story is better than the Tom's Hardware one. It ties the Cisco anecdote into a larger trend of some people deliberately hiring younger, less experienced developers for their AI projects - because they are more likely to be "AI native".

Comment · 1 day ago
The personal energy usage impact of LLMs remains tiny, even for projects that use millions of tokens. Skip one 20 minute drive and you should be covered for weeks, if not months.
Comment · 1 day ago
I've recently talked to people at Anthropic who are very confident that they have effectively solved the prompt injection risks that cause lethal trifecta attacks with their latest models.

The open challenge is how to prove it!

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