Simon Willison's Weblog: deep-blue

Coding After Coders: The End of Computer Programming as We Know It

2026-03-12T19:23:44+00:00

Coding After Coders: The End of Computer Programming as We Know It

Epic piece on AI-assisted development by Clive Thompson for the New York Times Magazine, who spoke to more than 70 software developers from companies like Google, Amazon, Microsoft, Apple, plus other individuals including Anil Dash, Thomas Ptacek, Steve Yegge, and myself.

I think the piece accurately and clearly captures what's going on in our industry right now in terms appropriate for a wider audience.

I talked to Clive a few weeks ago. Here's the quote from me that made it into the piece.

Given A.I.’s penchant to hallucinate, it might seem reckless to let agents push code out into the real world. But software developers point out that coding has a unique quality: They can tether their A.I.s to reality, because they can demand the agents test the code to see if it runs correctly. “I feel like programmers have it easy,” says Simon Willison, a tech entrepreneur and an influential blogger about how to code using A.I. “If you’re a lawyer, you’re screwed, right?” There’s no way to automatically check a legal brief written by A.I. for hallucinations — other than face total humiliation in court.

The piece does raise the question of what this means for the future of our chosen line of work, but the general attitude from the developers interviewed was optimistic - there's even a mention of the possibility that the Jevons paradox might increase demand overall.

One critical voice came from an Apple engineer:

A few programmers did say that they lamented the demise of hand-crafting their work. “I believe that it can be fun and fulfilling and engaging, and having the computer do it for you strips you of that,” one Apple engineer told me. (He asked to remain unnamed so he wouldn’t get in trouble for criticizing Apple’s embrace of A.I.)

That request to remain anonymous is a sharp reminder that corporate dynamics may be suppressing an unknown number of voices on this topic.

Tags: new-york-times, careers, ai, generative-ai, llms, ai-assisted-programming, press-quotes, deep-blue

Quoting Les Orchard

2026-03-12T16:28:07+00:00

Here's what I think is happening: AI-assisted coding is exposing a divide among developers that was always there but maybe less visible.

Before AI, both camps were doing the same thing every day. Writing code by hand. Using the same editors, the same languages, the same pull request workflows. The craft-lovers and the make-it-go people sat next to each other, shipped the same products, looked indistinguishable. The motivation behind the work was invisible because the process was identical.

Now there's a fork in the road. You can let the machine write the code and focus on directing what gets built, or you can insist on hand-crafting it. And suddenly the reason you got into this in the first place becomes visible, because the two camps are making different choices at that fork.

— Les Orchard, Grief and the AI Split

Tags: les-orchard, careers, ai, generative-ai, llms, ai-assisted-programming, deep-blue

Quoting Kellan Elliott-McCrea

2026-02-25T03:30:32+00:00

It’s also reasonable for people who entered technology in the last couple of decades because it was good job, or because they enjoyed coding to look at this moment with a real feeling of loss. That feeling of loss though can be hard to understand emotionally for people my age who entered tech because we were addicted to feeling of agency it gave us. The web was objectively awful as a technology, and genuinely amazing, and nobody got into it because programming in Perl was somehow aesthetically delightful.

— Kellan Elliott-McCrea, Code has always been the easy part

Tags: kellan-elliott-mccrea, perl, ai, generative-ai, llms, agentic-engineering, deep-blue

The A.I. Disruption We’ve Been Waiting for Has Arrived

2026-02-18T17:07:31+00:00

The A.I. Disruption We’ve Been Waiting for Has Arrived

New opinion piece from Paul Ford in the New York Times. Unsurprisingly for a piece by Paul it's packed with quoteworthy snippets, but a few stood out for me in particular.

Paul describes the November moment that so many other programmers have observed, and highlights Claude Code's ability to revive old side projects:

[Claude Code] was always a helpful coding assistant, but in November it suddenly got much better, and ever since I’ve been knocking off side projects that had sat in folders for a decade or longer. It’s fun to see old ideas come to life, so I keep a steady flow. Maybe it adds up to a half-hour a day of my time, and an hour of Claude’s.

November was, for me and many others in tech, a great surprise. Before, A.I. coding tools were often useful, but halting and clumsy. Now, the bot can run for a full hour and make whole, designed websites and apps that may be flawed, but credible. I spent an entire session of therapy talking about it.

And as the former CEO of a respected consultancy firm (Postlight) he's well positioned to evaluate the potential impact:

When you watch a large language model slice through some horrible, expensive problem — like migrating data from an old platform to a modern one — you feel the earth shifting. I was the chief executive of a software services firm, which made me a professional software cost estimator. When I rebooted my messy personal website a few weeks ago, I realized: I would have paid $25,000 for someone else to do this. When a friend asked me to convert a large, thorny data set, I downloaded it, cleaned it up and made it pretty and easy to explore. In the past I would have charged $350,000.

That last price is full 2021 retail — it implies a product manager, a designer, two engineers (one senior) and four to six months of design, coding and testing. Plus maintenance. Bespoke software is joltingly expensive. Today, though, when the stars align and my prompts work out, I can do hundreds of thousands of dollars worth of work for fun (fun for me) over weekends and evenings, for the price of the Claude $200-a-month plan.

He also neatly captures the inherent community tension involved in exploring this technology:

All of the people I love hate this stuff, and all the people I hate love it. And yet, likely because of the same personality flaws that drew me to technology in the first place, I am annoyingly excited.

Tags: new-york-times, paul-ford, careers, ai, generative-ai, llms, ai-assisted-programming, ai-ethics, coding-agents, claude-code, deep-blue, november-2025-inflection

Deep Blue

2026-02-15T21:06:44+00:00

We coined a new term on the Oxide and Friends podcast last month (primary credit to Adam Leventhal) covering the sense of psychological ennui leading into existential dread that many software developers are feeling thanks to the encroachment of generative AI into their field of work.

We're calling it Deep Blue.

You can listen to it being coined in real time from 47:15 in the episode. I've included a transcript below.

Deep Blue is a very real issue.

Becoming a professional software engineer is hard. Getting good enough for people to pay you money to write software takes years of dedicated work. The rewards are significant: this is a well compensated career which opens up a lot of great opportunities.

It's also a career that's mostly free from gatekeepers and expensive prerequisites. You don't need an expensive degree or accreditation. A laptop, an internet connection and a lot of time and curiosity is enough to get you started.

And it rewards the nerds! Spending your teenage years tinkering with computers turned out to be a very smart investment in your future.

The idea that this could all be stripped away by a chatbot is deeply upsetting.

I've seen signs of Deep Blue in most of the online communities I spend time in. I've even faced accusations from my peers that I am actively harming their future careers through my work helping people understand how well AI-assisted programming can work.

I think this is an issue which is causing genuine mental anguish for a lot of people in our community. Giving it a name makes it easier for us to have conversations about it.

My experiences of Deep Blue

I distinctly remember my first experience of Deep Blue. For me it was triggered by ChatGPT Code Interpreter back in early 2023.

My primary project is Datasette, an ecosystem of open source tools for telling stories with data. I had dedicated myself to the challenge of helping people (initially focusing on journalists) clean up, analyze and find meaning in data, in all sorts of shapes and sizes.

I expected I would need to build a lot of software for this! It felt like a challenge that could keep me happily engaged for many years to come.

Then I tried uploading a CSV file of San Francisco Police Department Incident Reports - hundreds of thousands of rows - to ChatGPT Code Interpreter and... it did every piece of data cleanup and analysis I had on my napkin roadmap for the next few years with a couple of prompts.

It even converted the data into a neatly normalized SQLite database and let me download the result!

I remember having two competing thoughts in parallel.

On the one hand, as somebody who wants journalists to be able to do more with data, this felt like a huge breakthrough. Imagine giving every journalist in the world an on-demand analyst who could help them tackle any data question they could think of!

But on the other hand... what was I even for? My confidence in the value of my own projects took a painful hit. Was the path I'd chosen for myself suddenly a dead end?

I've had some further pangs of Deep Blue just in the past few weeks, thanks to the Claude Opus 4.5/4.6 and GPT-5.2/5.3 coding agent effect. As many other people are also observing, the latest generation of coding agents, given the right prompts, really can churn away for a few minutes to several hours and produce working, documented and fully tested software that exactly matches the criteria they were given.

"The code they write isn't any good" doesn't really cut it any more.

A lightly edited transcript

Bryan: I think that we're going to see a real problem with AI induced ennui where software engineers in particular get listless because the AI can do anything. Simon, what do you think about that?

Simon: Definitely. Anyone who's paying close attention to coding agents is feeling some of that already. There's an extent where you sort of get over it when you realize that you're still useful, even though your ability to memorize the syntax of program languages is completely irrelevant now.

Something I see a lot of is people out there who are having existential crises and are very, very unhappy because they're like, "I dedicated my career to learning this thing and now it just does it. What am I even for?". I will very happily try and convince those people that they are for a whole bunch of things and that none of that experience they've accumulated has gone to waste, but psychologically it's a difficult time for software engineers.

[...]

Bryan: Okay, so I'm going to predict that we name that. Whatever that is, we have a name for that kind of feeling and that kind of, whether you want to call it a blueness or a loss of purpose, and that we're kind of trying to address it collectively in a directed way.

Adam: Okay, this is your big moment. Pick the name. If you call your shot from here, this is you pointing to the stands. You know, I – Like deep blue, you know.

Bryan: Yeah, deep blue. I like that. I like deep blue. Deep blue. Oh, did you walk me into that, you bastard? You just blew out the candles on my birthday cake.

It wasn't my big moment at all. That was your big moment. No, that is, Adam, that is very good. That is deep blue.

Simon: All of the chess players and the Go players went through this a decade ago and they have come out stronger.

Turns out it was more than a decade ago: Deep Blue defeated Garry Kasparov in 1997.

Tags: definitions, careers, ai, generative-ai, llms, ai-assisted-programming, oxide, bryan-cantrill, ai-ethics, coding-agents, deep-blue

Quoting Thoughtworks

2026-02-14T04:54:41+00:00

The retreat challenged the narrative that AI eliminates the need for junior developers. Juniors are more profitable than they have ever been. AI tools get them past the awkward initial net-negative phase faster. They serve as a call option on future productivity. And they are better at AI tools than senior engineers, having never developed the habits and assumptions that slow adoption.

The real concern is mid-level engineers who came up during the decade-long hiring boom and may not have developed the fundamentals needed to thrive in the new environment. This population represents the bulk of the industry by volume, and retraining them is genuinely difficult. The retreat discussed whether apprenticeship models, rotation programs and lifelong learning structures could address this gap, but acknowledged that no organization has solved it yet.

— Thoughtworks, findings from a retreat concerning "the future of software engineering", conducted under Chatham House rules

Tags: careers, ai, ai-assisted-programming, deep-blue

LLM predictions for 2026, shared with Oxide and Friends

2026-01-08T19:42:13+00:00

I joined a recording of the Oxide and Friends podcast on Tuesday to talk about 1, 3 and 6 year predictions for the tech industry. This is my second appearance on their annual predictions episode, you can see my predictions from January 2025 here. Here's the page for this year's episode, with options to listen in all of your favorite podcast apps or directly on YouTube.

Bryan Cantrill started the episode by declaring that he's never been so unsure about what's coming in the next year. I share that uncertainty - the significant advances in coding agents just in the last two months have left me certain that things will change significantly, but unclear as to what those changes will be.

Here are the predictions I shared in the episode.

1 year: It will become undeniable that LLMs write good code ▶ 19:27

I think that there are still people out there who are convinced that LLMs cannot write good code. Those people are in for a very nasty shock in 2026. I do not think it will be possible to get to the end of even the next three months while still holding on to that idea that the code they write is all junk and it's it's likely any decent human programmer will write better code than they will.

In 2023, saying that LLMs write garbage code was entirely correct. For most of 2024 that stayed true. In 2025 that changed, but you could be forgiven for continuing to hold out. In 2026 the quality of LLM-generated code will become impossible to deny.

I base this on my own experience - I've spent more time exploring AI-assisted programming than most.

The key change in 2025 (see my overview for the year) was the introduction of "reasoning models" trained specifically against code using Reinforcement Learning. The major labs spent a full year competing with each other on who could get the best code capabilities from their models, and that problem turns out to be perfectly attuned to RL since code challenges come with built-in verifiable success conditions.

Since Claude Opus 4.5 and GPT-5.2 came out in November and December respectively the amount of code I've written by hand has dropped to a single digit percentage of my overall output. The same is true for many other expert programmers I know.

At this point if you continue to argue that LLMs write useless code you're damaging your own credibility.

1 year: We're finally going to solve sandboxing ▶ 20:05

I think this year is the year we're going to solve sandboxing. I want to run code other people have written on my computing devices without it destroying my computing devices if it's malicious or has bugs. [...] It's crazy that it's 2026 and I still pip install random code and then execute it in a way that it can steal all of my data and delete all my files. [...] I don't want to run a piece of code on any of my devices that somebody else wrote outside of sandbox ever again.

This isn't just about LLMs, but it becomes even more important now there are so many more people writing code often without knowing what they're doing. Sandboxing is also a key part of the battle against prompt injection.

We have a lot of promising technologies in play already for this - containers and WebAssembly being the two I'm most optimistic about. There's real commercial value involved in solving this problem. The pieces are there, what's needed is UX work to reduce the friction in using them productively and securely.

1 year: A "Challenger disaster" for coding agent security ▶ 21:21

I think we're due a Challenger disaster with respect to coding agent security[...] I think so many people, myself included, are running these coding agents practically as root, right? We're letting them do all of this stuff. And every time I do it, my computer doesn't get wiped. I'm like, "oh, it's fine". [...] The worst version of this is the worm - a prompt injection worm which infects people's computers and adds itself to the Python or NPM packages that person has access to.

I used this as an opportunity to promote my favourite recent essay about AI security, the Normalization of Deviance in AI by Johann Rehberger.

The Normalization of Deviance describes the phenomenon where people and organizations get used to operating in an unsafe manner because nothing bad has happened to them yet, which can result in enormous problems (like the 1986 Challenger disaster) when their luck runs out.

Every six months I predict that a headline-grabbing prompt injection attack is coming soon, and every six months it doesn't happen. This is my most recent version of that prediction!

1 year: Kākāpō parrots will have an outstanding breeding season ▶ 50:06

(I dropped this one to lighten the mood after a discussion of the deep sense of existential dread that many programmers are feeling right now!)

I think that Kākāpō parrots in New Zealand are going to have an outstanding breeding season. The reason I think this is that the Rimu trees are in fruit right now. There's only 250 of them, and they only breed if the Rimu trees have a good fruiting. The Rimu trees have been terrible since 2019, but this year the Rimu trees were all blooming. There are researchers saying that all 87 females of breeding age might lay an egg. And for a species with only 250 remaining parrots that's great news.

(I just checked Wikipedia and I was right with the parrot numbers but wrong about the last good breeding season, apparently 2022 was a good year too.)

In a year with precious little in the form of good news I am utterly delighted to share this story. Here's more:

Kākāpō breeding season 2026 introduction from the Department of Conservation from June 2025 .
Bumper breeding season for kākāpō on the cards - 3rd December 2025, University of Auckland.

I don't often use AI-generated images on this blog, but the Kākāpō image the Oxide team created for this episode is just perfect:

3 years: the coding agents Jevons paradox for software engineering will resolve, one way or the other ▶ 54:37

We will find out if the Jevons paradox saves our careers or not. This is a big question that anyone who's a software engineer has right now: we are driving the cost of actually producing working code down to a fraction of what it used to cost. Does that mean that our careers are completely devalued and we all have to learn to live on a tenth of our incomes, or does it mean that the demand for software, for custom software goes up by a factor of 10 and now our skills are even more valuable because you can hire me and I can build you 10 times the software I used to be able to? I think by three years we will know for sure which way that one went.

The quote says it all. There are two ways this coding agents thing could go: it could turn out software engineering skills are devalued, or it could turn out we're more valuable and effective than ever before.

I'm crossing my fingers for the latter! So far it feels to me like it's working out that way.

3 years: Someone will build a new browser using mainly AI-assisted coding and it won't even be a surprise ▶ 65:13

I think somebody will have built a full web browser mostly using AI assistance, and it won't even be surprising. Rolling a new web browser is one of the most complicated software projects I can imagine[...] the cheat code is the conformance suites. If there are existing tests that it'll get so much easier.

A common complaint today from AI coding skeptics is that LLMs are fine for toy projects but can't be used for anything large and serious.

I think within 3 years that will be comprehensively proven incorrect, to the point that it won't even be controversial anymore.

I picked a web browser here because so much of the work building a browser involves writing code that has to conform to an enormous and daunting selection of both formal tests and informal websites-in-the-wild.

Coding agents are really good at tasks where you can define a concrete goal and then set them to work iterating in that direction.

A web browser is the most ambitious project I can think of that leans into those capabilities.

6 years: Typing code by hand will go the way of punch cards ▶ 80:39

I think the job of being paid money to type code into a computer will go the same way as punching punch cards [...] in six years time, I do not think anyone will be paid to just to do the thing where you type the code. I think software engineering will still be an enormous career. I just think the software engineers won't be spending multiple hours of their day in a text editor typing out syntax.

The more time I spend on AI-assisted programming the less afraid I am for my job, because it turns out building software - especially at the rate it's now possible to build - still requires enormous skill, experience and depth of understanding.

The skills are changing though! Being able to read a detailed specification and transform it into lines of code is the thing that's being automated away. What's left is everything else, and the more time I spend working with coding agents the larger that "everything else" becomes.

Tags: predictions, sandboxing, ai, kakapo, generative-ai, llms, ai-assisted-programming, oxide, bryan-cantrill, coding-agents, conformance-suites, browser-challenge, deep-blue, november-2025-inflection