Claude Mythos 5 128K 1M Mythos-class (restricted); $10.00 / $50.00; released 2026-06-09 GPT-4.1 ⭐ 128K 1M Knowledge cutoff June 2024; $2.00 / $8.00; retired from ChatGPT Feb 13, 2026; API still ...
A complete, production-ready, 48-day Python and AI teaching handbook built as a modern PWA. Designed for a young learner, it covers everything from writing your first ...