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AI Models Compared 2026: GPT-5.6 vs Claude Opus 4.8 vs Grok 4.5
July rewrote the leaderboard. Fable 5, GPT-5.6 Sol, Grok 4.5, Muse Spark 1.1, Kimi K2.7-Code, Cognition SWE-1.7, GLM 5.2, and MiniMax M3. What holds up for coding, agents, and cost.