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Models simonwillison.net

Discovering cryptographic weaknesses with Claude

Discovering cryptographic weaknesses with Claude The best part of this article (here's the repo ) about how Anthropic researchers used Claude Mythos to find mathematical flaws in both HAWK and a weaker version of AES ("neither of these results has a practical impact on today’s computer systems") is the prompts that...

Research constellationr.com

Hugging Face OpenAI attack postmortem points to lack of AI agent visibility

Hugging Face OpenAI attack postmortem points to lack of AI agent visibility Larry Dignan Tue, 28 Jul 2026 - 16:32 Larry Dignan Editor in Chief of Constellation Insights Constellation Research Larry Dignan is Editor in Chief of Constellation Insights at Constellation Research, where he leads editorial coverage...

Startups thenextweb.com

ChatGPT has quietly stopped writing like your favourite author

Ask ChatGPT for a chapter in the voice of Stephen King and it now says no. It offers instead to write something with “the hallmarks of atmospheric, character-driven horror and small-town dread,” while staying “its own.” OpenAI has quietly changed how its chatbot handles author imitation, Ars Technica reported after...

AI tomshardware.com

Mystery reviewer 'finds' NVIDIA RTX Spark prototype laptop and puts it through its paces — Microsoft Surface Laptop Ultra with NVIDIA N1X chip shows promise, though prototype warts are still quite visible

Techie "finds" Nvidia RTX Spark prototype laptop and puts it through its paces — Microsoft Surface Laptop Ultra with Nvidia N1X chip shows promise, though prototype warts are still quite visible

Models blog.jetbrains.com

Ponytail Skill for Claude Code: Does It Really Cut Agent Code by 54%?

Part 3 of a series where we take public “token saver” add-ons for coding agents and run the same paired A/B benchmark against each of them. Part 1 was the caveman skill (advertised −65%, measured −8.5%). Part 2 was rtk (advertised −60–90%, measured +7.6%). We ran 80 paired tasks to test the ponytail skill for […]

Quick takes

Anthropic's Claude Opus 5 and Google's Gemini Flash family both target long-running agents and production coding workflows in the same release window.
Models
Infrastructure financing is tightening around GPU supply and credit as NVIDIA locks high-bandwidth memory and discusses a large OpenAI data-center backstop.
Chips
Enterprise agent platforms are entering production paths, with OpenAI Presence for voice and chat, Gemini Managed Agents, and large enterprise Codex deployments.
Models
Frontier labs are shipping both long-running agent flagships and denser Flash model families in the same mid-summer window.
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Vendors are productizing agents as enterprise platforms spanning managed APIs, local PC control, and voice or chat workflow deployment.
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AI infrastructure expansion is colliding with grid capacity limits, from temporary data-center power cuts to community permitting conditions and large financing backstops.
Chips
Frontier labs are refreshing agent-oriented model tiers, with Anthropic shipping Claude Opus 5 for long-running agents and Google expanding the Gemini Flash family including 3.6 Flash and Managed Agents hooks.
Models
AI infrastructure financing and grid constraints are converging as OpenAI builds in Georgia, pursues Ohio campus debt support, NVIDIA locks high-bandwidth memory supply, and grid operators weigh temporary data-center power cuts.
Chips

Market Pulse

AI Pulse
39/100
bearish

AI-linked equities are under pressure, with Advanced Micro Devices -8.15%, Arm Holdings plc -8.11%, Palantir Technologies. -6.08% driving the tracked basket lower.

AMD -8.15%
Advanced Micro Devices chips
ARM -8.11%
Arm Holdings plc chips
PLTR -6.08%
Palantir Technologies. data
SMCI -4.56%
Super Micro Computer cloud

Recurring Movers

AMD 12 hits · -8.15%
ARM 12 hits · -8.11%
PLTR 12 hits · -6.08%
SMCI 12 hits · -4.56%