Cursor unveiled Composer 2.5, reporting benchmark scores comparable to Opus 4.7 and GPT‑5.5, a ten‑fold cost reduction, explicit use of Moonshot’s Kimi K2.5 as a base, new RL training techniques, and a partnership with SpaceXAI that multiplies compute power, all highlighted by Elon Musk’s retweet.
Composer 2.5, Cursor’s latest LLM, matches Claude Opus 4.7‑level capabilities while costing roughly one‑tenth as much, thanks to larger training scale, precise text‑feedback reinforcement learning, 25× more synthetic tasks, and a new Muon‑HSDP optimizer that boosts efficiency up to ten‑fold.
Elon Musk dissolved xAI, rebranded it as SpaceXAI, and granted Anthropic access to the 220,000‑GPU Colossus 1 supercomputer, a move framed as a strategic strike to undermine OpenAI by leveraging massive orbital‑grade compute power.
Elon Musk announced the dissolution of xAI, merging its Grok model and X‑related assets into a new SpaceXAI division, while simultaneously granting Anthropic access to over 220,000 Nvidia GPUs and more than 300 MW of compute to boost Claude’s performance and limits.
