OpenAI's GPT-5.5 Beats Claude by 0.3% as Frontier Models Hit Performance Ceiling
The frontier LLM race just became a statistical coin flip, and that tells you everything about where the real competition is moving. OpenAI launched GPT-5.5, beating Anthropic's Claude Mythos Preview by a razor-thin margin on Terminal-Bench 2.0 — essentially a statistical tie between frontier models
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