Musk Calls Claude Opus 5.5 a Masterpiece
Musk says Grok 4.8, due to Bot users this week, trails Claude Opus 5.5, and bets Grok 5 passes it in two or three months.
Read the storyProduct · General assistants
An AI assistant for analysis, writing, coding and working with documents.
Get AI Secret’s free daily briefing, including Claude and the wider AI industry.

An AI assistant for analysis, writing, coding and working with documents.
Official product information checked .
Briefs, articles and relevant sections, newest first. Explore older coverage below.
More coverage
Musk says Grok 4.8, due to Bot users this week, trails Claude Opus 5.5, and bets Grok 5 passes it in two or three months.
Read the storyIn the filing that priced its IPO, Anthropic says AI accelerating its research has met a key safety threshold, a week after calling it imminent.
Anthropic launched Claude Meetings, Whiteboards, Sheets and Data days before its IPO, and Microsoft, one of its anchor buyers, fell more than 2%.
Plus: OpenAI Ships a Game Boy, AI Is Now Buying Used Jet Engines
Anthropic's first frontier models since Amodei urged a slowdown undercut GPT-6 Astra by 20%, and its answer to the contradiction is pacing, not pausing.
Claude modeled a 96-copy phage vault in 34 hours and cut purification to 90 minutes, though one protocol error cost two weeks.
Smart reports rank Claude Enterprise sessions by cost and count off-topic chats. Anthropic says they are not for judging individuals, yet names can be revealed.
Anthropic's message threads let agents send only new messages, cutting long-session wait by about 35%, while token usage and rates stay unchanged.
Plus: OpenAI Guards the Grid It Drains, Musk's Abundance Lasted Three Days
Plus: Google Needs SpaceX 35 Times Cheaper, OpenAI Can't Find $19 Billion