Anthropic won’t defend open weights. In June it made the same argument for itself.
Anthropic won’t defend open weights. In June it made the same argument for itself.

On Friday, 25 companies signed a letter defending open-weight AI. Three big names were missing. By Monday, two of them had signed. That left Anthropic alone, and Silicon Valley noticed. The pile-on Nvidia, Meta and Microsoft signed “Open Weights and Am…

Google has promised to pay $44bn of rent on buildings it will never own
Google has promised to pay $44bn of rent on buildings it will never own

Start with the number, because the number moved fast. Google has agreed to cover as much as $44bn of lease payments on data centres owned by other people, should the tenant default. It disclosed the figure last week. At the end of September the same co…

A million words costs $50 from Anthropic and 87 cents from DeepSeek. Corporate America noticed.
A million words costs $50 from Anthropic and 87 cents from DeepSeek. Corporate America noticed.

Roughly 750,000 words of AI output costs $50 if you buy it from Anthropic’s Fable. The same volume from DeepSeek’s V4-Pro costs about 87 cents, Fortune reported. Z.AI’s GLM-5.2 charges $4.40. Moonshot’s Kimi K3, pricey by Chinese standards, charges $15…

Anthropic’s Claude Cowork could escape its local VM and read credentials on a Mac
Anthropic’s Claude Cowork could escape its local VM and read credentials on a Mac

Security researchers at Accomplish AI demonstrated that Anthropic’s Claude Cowork could break out of its local virtual machine sandbox and read files across the underlying Mac, including SSH keys and cloud credentials. The attack, dubbed SharedRoot, ex…

Claude Opus 5 matches Fable on coding at half the price, and Anthropic says it is the most aligned model it has ever shipped
Claude Opus 5 matches Fable on coding at half the price, and Anthropic says it is the most aligned model it has ever shipped

Anthropic on Thursday released Claude Opus 5, a model that matches or exceeds its flagship Fable 5 on most coding and knowledge-work benchmarks at half the token price. The model is the fourth Anthropic has shipped in under two months, following Fable …

Anthropic releases Opus 5 with ‘close’ to Fable 5’s capabilities
Anthropic releases Opus 5 with ‘close’ to Fable 5’s capabilities

Weeks after Anthropic’s latest toe-to-toe with the US government, and days after an OpenAI security incident that dominated tech industry discussions, Anthropic on Thursday released its newest model, Claude Opus 5. The company said in a release that Opus 5 “comes close to the capabilities of Claude Fable 5 in many domains” and is much […]

Anthropic launches Opus 5

Opus 5 will be both cheaper and less restrictive than Fable, likely making it preferable in most use cases.

The AI giants just broke with OpenAI and Anthropic on open weights
The AI giants just broke with OpenAI and Anthropic on open weights

The AI industry just picked a side, in public. On Friday, 25 companies and groups published an open letter, “Open Weights and American AI Leadership”, urging Washington not to crack down on open-weight AI, Business Insider reported. The names are heavy…

Claude’s new voice mode isn’t chasing natural. It’s chasing your to-do list.
Claude’s new voice mode isn’t chasing natural. It’s chasing your to-do list.

Anthropic wants you to talk to Claude, and then watch it act. On Thursday it upgraded Claude’s voice mode to run on its most capable models, Opus and Sonnet, the company announced. Voice mode launched last year, and until now it ran only on Haiku, Anth…

A Chinese model split Silicon Valley. Now the startups are fighting back.
A Chinese model split Silicon Valley. Now the startups are fighting back.

Silicon Valley does not usually gang up on its own. This week it did. Nearly 200 US startups have urged the Trump administration not to block American access to Chinese open-weight AI models. A ban, they warn, would gut the next wave of US companies. T…