According to Greg Brockman citing Oege de Moor on X, XBOW used GPT-5.6 Sol and $40,000 of compute over 6 days to discover a Chrome full-chain exploit, earning Google’s first 2026 full-chain reward and underscoring defender opportunities to harden software.

According to bcherny, UK AISI verified Mythos Preview solved both end-to-end cyber ranges and set precision records on XBOW benchmarks.