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Claude Sonnet 5.5 just dropped, and on Terminal-Bench 4.0 it beats Opus 5.5 (70.6% vs 66.4%, per Anthropic's chart). Anthropic says it runs 30%+ faster than Sonnet 5 and costs up to 30% less for most work, with API pricing at $2/$10 per million tokens right now. Opus 5.5 still wins the other two agentic coding tests on that chart, and Artificial Analysis has Sonnet 5.5 at #2 on its Intelligence Index, right behind Opus 5.5. Intelligence per cost is the whole game. Would you switch? Claude Sonnet 5.5, Sonnet 5.5, Claude Opus 5.5, Anthropic, Claude AI, new AI model, AI news, AI news today, Claude pricing, AI pricing, price per million tokens, cheapest AI model, agentic coding, AI coding, Terminal-Bench, Artificial Analysis #greenscreen