Anthropic's cheaper model just beat Opus at agentic coding.

Claude Sonnet 5.5 is out: - 70.6% vs Opus 5.5's 66.4% on Terminal-Bench 4.0 - 30%+ faster than Sonnet 5 - Up to 30% cheaper for most work - Half Opus's price per token Top-tier AI is becoming everyday AI.

Fire ElementSep 29

Claude Sonnet 5.5 is now available.

・More than 30% faster than Sonnet 5 ・Up to 30% cheaper per job (price list remains the same) ・Development evaluation 10.3% → 70.6% ・Input 2 dollars ・Output 10 dollars / 1 million tokens = half of Opus 5.5 Use Opus for difficult decisions and Sonnet for everyday tasks.

カツSep 29