Codebook - AI Coding Companion

What's New in This Update Smarter, faster AI • Upgraded to GPT-5 (and GPT-5 mini on the free tier) for sharper answers and fewer formatting glitches. • Responses now stream in chunk-by-chunk and type out smoothly on screen. • A new pulsing indicator shows when the AI is thinking. Cleaner responses • Reworked how answers are generated and rendered: code stays in code blocks, prose stays as prose. • Redesigned Code Explanation page with a syntax-highlighted code preview and a clean markdown body for the explanation. Better Code Editor • Simulated languages (everything outside JavaScript, TypeScript, and Python) now produce noticeably more accurate, consistent results. • Output and errors are shown in separate, clearly-labeled panes. Challenges, refreshed • New card design with color-coded difficulty pills (Easy, Medium, Hard, Advanced), a "Completed" badge for finished challenges, and a clearer locked state. • The whole card is now tappable with a proper ripple effect. Plus security hardening and a bunch of smaller fixes. Thanks for using Codebook!