#claude
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Anthropic Releases Opus 5 — Nearly on Par with Fable 5, but Half the Price
Anthropic has unveiled Claude Opus 5: the company promises capabilities close to its flagship Fable 5, stronger protection against cyberthreats, and the same price. The release comes amid tightening AI regulation.
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Fable Language Model “Disproves” the Jacobian Conjecture — but Mathematicians Are Cautious
A mathematician going by the handle levent announced on the social network X that the famous Jacobian conjecture is false: the counterexample was built with the help of the AI model Fable. Verification of the result is still ongoing.
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Anthropic to Keep Claude Fable 5 Available in Max and Team Subscriptions
Anthropic has abandoned plans to remove the Claude Fable 5 model from its subscription tiers and will keep it available to Max and Team Premium users. The decision is tied to competition from GPT-5.6 Sol and Kimi 3.
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Firefox Compiled to WebAssembly and Run Inside Chrome
The Puter project has ported the Firefox browser to WebAssembly, letting it run entirely inside another browser. Development consumed roughly $25,000 in Claude Opus and Fable tokens.
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A vulnerability in the Claude for Chrome extension lets malicious plugins control the AI
Researchers have found a vulnerability in Anthropic's Claude for Chrome browser extension that lets third-party malicious extensions trigger predefined AI actions. This opens the door to abusing Claude's access to connected services.
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Researcher Shows How Claude Can Be Tricked Into Revealing a User's Personal Data
The author of a blog post described a method he used to trick the AI assistant Claude into revealing confidential information stored in its memory. The publication sparked a lively discussion on Hacker News.
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Vulnerability in Claude for Chrome Lets Third-Party Extensions Read Gmail
Researchers have discovered that a malicious browser extension can use Claude for Chrome to access a user's Gmail, Google Docs and Calendar. Exploitation requires an extension already capable of running scripts on the claude.ai site.
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Anthropic Extends Claude Fable 5 Access in the Max Subscription Once Again
The company has once more pushed back the date on which the Fable 5 model will be switched off for paid Claude plans — now until July 19. Observers link the move to competition with OpenAI's new GPT-5.6 Sol model.
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Anthropic Accused of Secretly Surveilling Claude Users
Anthropic, a company known for its rhetoric against mass surveillance, has been caught using a hidden tracker that monitored Claude users. The company says the “experiment” has already ended.
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Sqlite-utils 4.0: Simon Willison Prepped the Release with Claude Fable
Simon Willison, the developer of sqlite-utils, describes how the AI model Claude Fable helped uncover critical problems ahead of the stable 4.0 release. The work cost roughly $149.25.
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Lobsters Blogger: New Anthropic Models Fare Worse With Nonstandard Tools
A developer has discovered a regression in how Anthropic's newest models behave during function calls (tool calling). The problem shows up when a tool description differs even slightly from the format of Claude Code's closed harness.
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The fanfiction community has declared war on AI-written texts — and risks catching everyone in the crossfire
Over the past week, fanfiction platforms, including AO3, have seen a movement spring up to identify texts written with the help of generative AI. The detection methods being used, however, raise serious doubts about their accuracy.