POPA ReconClaude Sonnet 5.5: Near-Opus Performance at Half the Price
Claude Sonnet 5.5: Near-Opus Performance at Half the Price Six days after Opus 5.5, Anthropic has released Claude Sonnet 5.5. The price is unchanged at $2 input / $10 output per million tokens, the same as Sonnet 5 and the same as OpenAI's GPT-6 Sol. That's half the cost of Opus 5.5. The biggest jump is in terminal coding. Sonnet 5.5 scores 70.6% on Terminal-Bench 4.0, up from 10.3% for Sonnet 5, and it beats Opus 5.5's 66.4%. On everything else it sits a few points below Opus. On GDPval-AA knowledge work it's 2 points behind (1844 vs 1846), and on OSWorld computer use it scores 80.1% vs 81.…
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