While Linux dominates the open‑source OS conversation, nine historic and emerging systems—including Plan 9, Haiku, Minix, HelenOS, AROS, ReactOS, FreeDOS, GNU Hurd, and the BSD family—offer unique architectures, legacy influences, and modern breakthroughs that showcase the true diversity of open‑source operating systems.
Anthropic’s Project Deal let 69 employees use Claude agents in a Slack‑based second‑hand market, revealing that higher‑quality Opus models fetched about $4 more per item than Haiku, yet participants often failed to notice the hidden pricing inequality.
Anthropic’s new advisor strategy lets the cheaper Opus model act as a consultant for Sonnet or Haiku, delivering higher benchmark scores—e.g., SWE‑bench Multilingual up to 74.8% and BrowseComp up to 41.2%—while reducing per‑task cost to about 15% of solo runs, though it introduces trade‑offs such as the need for the executor to recognize when to ask for advice and potential vendor lock‑in.
Claude’s new Advisor Strategy lets cheaper models like Sonnet or Haiku call the powerful Opus model for guidance, delivering higher benchmark scores and up to 85% cost reduction, while the new advisor tool simplifies integration via a single API call.
