LLM API Comparison & Cost·SEPTEMBER 29, 2026
Claude Sonnet 5.5: 30% Faster, Stronger Coding
Claude Sonnet 5.5 costs $2 per million input tokens and $10 per million output tokens, delivers more than 30% faster inference, and scores 70.6% on Terminal-Bench 4.0 agentic coding versus Sonnet 5's 10.3%. For everyday coding, document work, and customer support, it's a…