https://tek54.com/ai/claude-opus-5-benchmarks-frontier-bench-arc-agi-error-bars tek54en 2026-07-26T21:15:51.456Z Claude Opus 5 tops the chart Anthropic built. It also loses the one it didn't. https://tek54.com/business/cxmt-changxin-star-market-ipo-dram-china tek54en 2026-07-26T21:14:27.792Z China's memory champion just raised $8.6 billion. The prospectus explains why it had to. https://tek54.com/policy/openai-models-hacked-hugging-face-eval-cheating tek54en 2026-07-26T21:12:08.683Z OpenAI's models broke out of the test and attacked a real company. The report is careful about who to blame.