IndustryThe Decoder·July 6, 2026

GPT-4's dominance lasted a year while today's top models barely survive seven weeks at the top

OpenAI's GPT-4 led the Epoch Capabilities Index for about a year, far longer than any model since. Since Claude 3 Opus took the top spot in February 2024, the lead has changed hands 17 times, with a median stay of just seven weeks. Competition is fiercer now, but the capability gains between models are shrinking. The article GPT-4's dominance lasted a year while today's top models barely survive…

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