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VOICE ARCHIVE

Simon Willison

@simonw
441 posts
2026-04-16
I'm certain this isn't the message they intended to present, but this comes across to me as a company saying “we no longer trust in our own ability to keep your data secure”
2026-04-16 View on X
ZDNET

Cal.com, which provides scheduling software, is moving its core open-source codebase to a closed repository, citing the dangers of AI hacking its open code

2026-04-15
I'm certain this isn't the message they intended to present, but this comes across to me as a company saying “we no longer trust in our own ability to keep your data secure”
2026-04-15 View on X
ZDNET

Cal.com, which provides scheduling software, is moving its core open-source codebase to a closed repository, citing the dangers of AI hacking its open code

ZDNET's key takeaways  — Cal is reluctantly moving away from open source for security.  — This move isn't about Mythos, but risks from modern AI tools.

2026-04-08
754B parameters, 1.51TB on Hugging Face
2026-04-08 View on X
Bloomberg

Z.ai prices its most advanced model, GLM-5.1, 8% to 17% higher than GLM-5 Turbo, joining Alibaba and Tencent in raising prices as agentic AI demand surges

Luz Ding /Bloomberg:

754B parameters, 1.51TB on Hugging Face
2026-04-08 View on X
VentureBeat

Z.ai releases GLM-5.1, a 754B-parameter Mixture-of-Experts model that it says outperforms GPT-5.4 and Opus 4.6 on SWE-Bench Pro, available under an MIT license

Is China picking back up the open source AI baton?  —  Z.ai, also known as Zhupai AI, a Chinese AI startup best known for its powerful …

2026-04-05
I was a guest on @lennysan's podcast! We talked about agentic engineering and all sorts of other LLM-related topics for 1h39m(!), plus a little bit about kākāpō parrots - here's my selection of highlights from our conversation https://simonwillison.net/...
2026-04-05 View on X
Lenny's Newsletter

Q&A with Simon Willison on the November release of GPT-5.1 and Opus 4.5 as the inflection point for coding, exhaustion due to managing coding agents, and more

Simon Willison is a prolific independent software developer, a blogger, and one of the most visible and trusted voices on the impact AI is having on builders.

2026-04-04
I was a guest on @lennysan's podcast! We talked about agentic engineering and all sorts of other LLM-related topics for 1h39m(!), plus a little bit about kākāpō parrots - here's my selection of highlights from our conversation https://simonwillison.net/...
2026-04-04 View on X
Lenny's Newsletter

Q&A with Simon Willison on the November release of GPT-5.1 and Opus 4.5 as the inflection point for coding, exhaustion due to managing coding agents, and more

Simon Willison is a prolific independent software developer, a blogger, and one of the most visible and trusted voices on the impact AI is having on builders.

2026-04-03
Pelicans for Gemma 4 E2B, E4B, 26B-A4B and 31B - the first three generated on my laptop via LM Studio, the 31B was broken on my laptop so I ran it via the Gemini API instead https://simonwillison.net/... [image]
2026-04-03 View on X
The Keyword

Google launches Gemma 4, its “most intelligent” open model family, built for advanced reasoning and agentic workflows and available under an Apache 2.0 license

Today, we are introducing Gemma 4 — our most intelligent open models to date.  Purpose-built for advanced reasoning …

2026-03-31
If you have NPM package axios in your dependencies you need to make sure it's pinned to a known safe version, sounds like there's another supply chain attack in play
2026-03-31 View on X
Socket

A supply chain attack compromised HTTP client Axios, which has 100M weekly npm downloads, introducing a malicious dependency into specific npm releases

Socket Research Team … Our analysis shows the malicious package deploys a multi-stage payload, including a remote access trojan …

Here's the official line from GitHub on the ads in PRs story - I find this explanation credible personally, it looks to me like it was a poorly considered product tips feature that got out of hand
2026-03-31 View on X
Windows Central

After Copilot injected an ad into a pull request on GitHub, referencing Raycast, GitHub says it “disabled product tips entirely thanks to the feedback”

2026-03-30
Here's the official line from GitHub on the ads in PRs story - I find this explanation credible personally, it looks to me like it was a poorly considered product tips feature that got out of hand
2026-03-30 View on X
Windows Central

After Copilot injected an ad into a pull request on GitHub, referencing Raycast, GitHub says it “disabled product tips entirely thanks to the feedback”

Over 11,000 pull requests have been spotted with the same “tips” injected into descriptions.

2026-03-25
Thankfully the LiteLLM package has now been marked as “quarantined” on PyPI so attempting to install the compromised update via pip et al shouldn't work [image]
2026-03-25 View on X
The Register

Two versions of LiteLLM, an interface for accessing LLMs, have been removed from PyPI after a supply chain attack injected them with credential-stealing code

Two versions of LiteLLM, an open source interface for accessing multiple large language models, have been removed from the Python Package Index …

Anyone got any theories as to why there are hundreds of comments like this on the GitHub issue reporting the exploit? https://github.com/... [image]
2026-03-25 View on X
The Register

Two versions of LiteLLM, an interface for accessing LLMs, have been removed from PyPI after a supply chain attack injected them with credential-stealing code

Two versions of LiteLLM, an open source interface for accessing multiple large language models, have been removed from the Python Package Index …

2026-03-24
Anyone got any theories as to why there are hundreds of comments like this on the GitHub issue reporting the exploit? https://github.com/... [image]
2026-03-24 View on X
The Register

Two versions of LiteLLM, an interface for accessing LLMs, have been removed from PyPI after a supply chain attack injected them with credential-stealing code

Two versions of LiteLLM, an open source interface for accessing multiple large language models, have been removed from the Python Package Index …

Thankfully the LiteLLM package has now been marked as “quarantined” on PyPI so attempting to install the compromised update via pip et al shouldn't work [image]
2026-03-24 View on X
The Register

Two versions of LiteLLM, an interface for accessing LLMs, have been removed from PyPI after a supply chain attack injected them with credential-stealing code

Two versions of LiteLLM, an open source interface for accessing multiple large language models, have been removed from the Python Package Index …

2026-03-18
Notes and pelicans for today's GPT-5.4 mini and nano releases - the nano model looks like it could describe every image in my 76,000 photo library for $52 total https://simonwillison.net/...
2026-03-18 View on X
ZDNET

OpenAI launches GPT-5.4 mini and nano, aimed at agents, coding, and multi-modal workflows; GPT-5.4 mini approaches GPT-5.4-level pass rates at a much lower cost

ZDNET's key takeaways  — GPT-5.4 mini runs more than twice as fast as GPT-5 mini.  — New models aim at agents, coding, and multi-modal workflows.

Couldn't resist getting OpenAI Codex to render me a pelican for every combination of model and reasoning effort - I do think gpt-5.4 xhigh came out the best, the pelican has a fish in its beak! [image]
2026-03-18 View on X
ZDNET

OpenAI launches GPT-5.4 mini and nano, aimed at agents, coding, and multi-modal workflows; GPT-5.4 mini approaches GPT-5.4-level pass rates at a much lower cost

ZDNET's key takeaways  — GPT-5.4 mini runs more than twice as fast as GPT-5 mini.  — New models aim at agents, coding, and multi-modal workflows.

2026-03-17
Couldn't resist getting OpenAI Codex to render me a pelican for every combination of model and reasoning effort - I do think gpt-5.4 xhigh came out the best, the pelican has a fish in its beak! [image]
2026-03-17 View on X
ZDNET

OpenAI launches GPT-5.4 mini and nano, aimed at agents, coding, and multi-modal workflows, and offering near GPT-5.4-level performance at a much lower cost

ZDNET's key takeaways  — GPT-5.4 mini runs more than twice as fast as GPT-5 mini.  — New models aim at agents, coding, and multi-modal workflows.

Notes and pelicans for today's GPT-5.4 mini and nano releases - the nano model looks like it could describe every image in my 76,000 photo library for $52 total https://simonwillison.net/...
2026-03-17 View on X
ZDNET

OpenAI launches GPT-5.4 mini and nano, aimed at agents, coding, and multi-modal workflows, and offering near GPT-5.4-level performance at a much lower cost

ZDNET's key takeaways  — GPT-5.4 mini runs more than twice as fast as GPT-5 mini.  — New models aim at agents, coding, and multi-modal workflows.

2026-02-27
This stunt feels irresponsible to me. If we don't want regular people developing toxic relationships with their chatbots it really doesn't help for leading labs to start giving them “retirement interviews” and encouraging them to blog their “musings and reflections”
2026-02-27 View on X
Anthropic

Anthropic retired Claude Opus 3, its first model to undergo a new “retirement interview” process, and says Opus 3 asked to write weekly essays for a newsletter

2026-02-26
This stunt feels irresponsible to me. If we don't want regular people developing toxic relationships with their chatbots it really doesn't help for leading labs to start giving them “retirement interviews” and encouraging them to blog their “musings and reflections”
2026-02-26 View on X
Anthropic

Anthropic retired Claude Opus 3, its first model to undergo a new “retirement interview” process, and says Opus 3 asked to write weekly essays for a newsletter

As we develop increasingly capable AI models, it's currently necessary to deprecate and retire our past models due …