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The AI Industry Is Betting on Open Weights

The AI Industry Is Betting on Open Weights

NVIDIA CEO Jensen Huang, who had long stayed off social media, posted on X for the first time on July 24. His debut was not a product launch or a GPU teaser. It was a policy letter, with one argument: Washington should not restrict open weight AI. Microsoft CEO Satya Nadella wrote on LinkedIn that open-weight models are "essential to a healthy AI ecosystem." The letter, Open Weights and American AI Leadership, launched with 25 signatures and now carries 50, a roster that runs from NVIDIA,…

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An Inside Look at the Relay Market Powering Token Resellers and Fraud

An Inside Look at the Relay Market Powering Token Resellers and Fraud

An Inside Look at the Relay Market Powering Token Resellers and Fraud Fascinating investigation by Matt Lenhard into the market that has grown up around reselling LLM tokens at a discount by pooling API keys from various sources. This looks to be mostly a thing in China. Resellers sell access to an LLM proxy that offers significant discounts on regular API pricing, which they achieve by abusing free trials, proxying through unprotected support bots, or sometimes through stolen credit cards or…

Simon Willison's Weblog
Teaching LLMs to Update Beliefs for Efficient Long-Horizon Interaction

Teaching LLMs to Update Beliefs for Efficient Long-Horizon Interaction

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BAIR Blog
Ruff v0.16.0

Ruff v0.16.0

Ruff v0.16.0 Astral shipped a significant new version of their Ruff Python linting tool a few days ago on July 23rd. I noticed today because my various CI jobs all started failing thanks to new default Ruff checks and my unpinned "ruff" dev dependency. From Brent Westbrook's announcement post: Ruff now enables 413 rules by default, up from 59 in previous versions. Since Ruff's default rule set was last modified in v0.1.0, the number of rules in Ruff has grown from 708 to 968. Many of these…

Simon Willison's Weblog
A Card Counter Mindset

A Card Counter Mindset

Summertime and the living is easy…or so they say. July has us fully immersed in the summer season, which is proving to be a hot one for most. Making it the perfect time to find a cool spot in the shade (or air conditioning) and read the July issue. Let’s get started with a preview […] The post A Card Counter Mindset appeared first on PHP Architect.

PHP Architect
Quoting Boris Cherny

Quoting Boris Cherny

More than any of these eval scores, what is most exciting to me is something else: Opus 5 is our least prompt injectable model yet. It is a bit buried in the system card, but across PI evals and red teaming, Opus 5 is very hard to prompt inject successfully. — Boris Cherny, here's that System Card section, page 73 Tags: prompt-injection, anthropic, claude, generative-ai, ai, llms, boris-cherny

Simon Willison's Weblog
Introducing Claude Opus 5

Introducing Claude Opus 5

Introducing Claude Opus 5 I've been offline kayaking with sea otters for much of today so I haven't had a chance to put Anthropic's new model Claude Opus 5 through its paces yet. The buzz is positive, and Anthropic's description of it as a "thoughtful and proactive model that comes close to the frontier intelligence of Claude Fable 5 at half the price" sounds promising. It's currently leading the Artificial Analysis leaderboard, in front of even Fable 5. It's priced the same as Opus 4.8, and…

Simon Willison's Weblog
The Economics of Agentic AI: Engineering for Imperfection

The Economics of Agentic AI: Engineering for Imperfection

The price of adoption euphoria You played entirely by the book. You procured the most capable enterprise models, mandated adoption across your teams, and put the right metrics in place. The promise was a predictable boost in efficiency. And at first, it delivered. The demos were flawless. The prototypes worked. The agents reasoned with a […]

O'Reilly Radar — AI/ML
Fake Corepack Site Distributes Infostealer and Proxyware to Developers

Fake Corepack Site Distributes Infostealer and Proxyware to Developers

A website at corepack[.]org is impersonating Corepack, the Node.js tool for managing package managers, and using that identity to push malware to developers who land on the page looking for a download. The site has existed in some form since early 2026 as a low-quality, apparently AI-generated imitation, but it recently started serving executable downloads. Socket's Threat Research team analyzed the site and confirmed it as a developer-targeted phishing and impersonation operation that drops an…

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