GPT 5.5 vs Claude vs Gemini vs DeepSeek V4: 2026 Comparison
Last updated: May 16, 2026 Quick Answer GPT 5.5 is OpenAI’s first fully retrained GPT-5-series base model, released April 23, 2026, and it currently tops the Artificial Analysis Intelligence Index with a score of 60 [1][5]. But it’s not the automatic best
