Anthropic's Opus 5.5 Outpaces OpenAI's GPT-6 Astra on Intelligence and Cost
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Anthropic released Claude Opus 5.5 on September 22, 2026, positioning it as the strongest-performing model it has tested to date. With superior benchmarks and significantly lower pricing than OpenAI's competing GPT-6 Astra, which launched weeks earlier on September 3, Opus 5.5 marks a critical inflection in the AI models market: raw capability no longer correlates with expense.
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