GPT-5.4 vs Gemini 3.1 Pro vs Claude Opus 4.6: April 2026 Benchmarks

April 2026 has produced the most closely contested AI model race in history. Three frontier models — OpenAI’s GPT-5.4, Google’s Gemini 3.1 Pro, and Anthropic’s Claude Opus 4.6 — are all competitive at the top of the capability curve, but each has car...