Claude Haiku 4.5 vs GPT-5.4 Mini: Budget Model Showdown for Developers in 2026

Claude Haiku 4.5 vs GPT-5.4 Mini: Budget Model Showdown for Developers in 2026 TL;DR — Claude Haiku 4.5 and GPT-5.4 Mini are the two best budget AI models in 2026, each costing 80-90% less than flagship models. GPT-5.4 Mini wins on price and speed; C...