Four high-profile artificial intelligence (AI) labs released frontier language models within a three-week stretch in July 2026, and the gap between what these systems finish without human intervention and what came before has narrowed sharply. Grok 4.5 from xAI, Claude Opus 5 from Anthropic, the GPT-5.6 family from OpenAI, and Kimi K3 from Moonshot AI […] 
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