SAM ALTMAN SAYS AGENTS ARE COMING • CHATGPT GAINED SENTIENCE FOR 4 SECONDS • GOOGLE RELEASES 40th LLM THIS WEEK • NVIDIA MARKET CAP EXCEEDS REALITY • ANTHROPIC ENGINEER DISCOVERS NEW FORM OF GRIEF • MISTRAL RAISES AT VALUATION OF GROSS DOMESTIC PRODUCT • SAM ALTMAN SAYS AGENTS ARE COMING • CHATGPT GAINED SENTIENCE FOR 4 SECONDS • GOOGLE RELEASES 40th LLM THIS WEEK • NVIDIA MARKET CAP EXCEEDS REALITY • ANTHROPIC ENGINEER DISCOVERS NEW FORM OF GRIEF • MISTRAL RAISES AT VALUATION OF GROSS DOMESTIC PRODUCT •
toolsWTF 5.8via Simon Willison

Claude Code uses Bun written in Rust now

"Anthropics ninja-swapped Bun for Rust and literally nobody noticed until now."

Explain Like I'm Normal

Anthropic's CLI agent, Claude Code, has quietly transitioned to using a version of the Bun runtime rewritten in Rust. While the switch provided a 10% startup speed boost on Linux, the change was so seamless that it wasn't discovered until developers inspected the binary strings. This confirms that major AI tools are moving toward hyper-optimized, custom infrastructure to reduce latency.

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#bun#rust#claudecode#runtime#anthropic

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