Claude Sonnet 5 continues Anthropic's pattern of hiding price increases behind unchanged token rates

Anthropic's Claude Sonnet 5 model consumes about 40% more tokens per task than its predecessor, nearly doubling real costs despite identical list prices, continuing the company's pattern of hidden price increases. The model ranks fifth in the Artificial Analysis Intelligence Index with 53 points and outperforms the pricier Opus 4.8 on some agent-based tasks.