Best AI Model for Coding in 2026: Claude Opus 5.5 vs GPT-6 vs Gemini 4 Argon
Which AI model should you code with in late 2026? We compare Claude Opus 5.5, Fable 5.1, GPT-6 Astra, GPT-6.1 Sol, GPT-6 Luna and Gemini 4 Argon on price, coding strength and availability, with clear picks for every budget.