Gemini 3 Pro vs Claude Opus 4.5 vs GPT-5: The Ultimate Frontier Model Comparison
Three frontier models launched within weeks of each other in late 2025. Google's Gemini 3 Pro arrived on November 18, followed by Claude Opus 4.5 from Anthropic on November 24, both following OpenAI's GPT-5 release from August 7. This release cadence marks an inflection