Anthropic: Claude Sonnet 5 Nears Opus 4.8

Anthropic released Claude Sonnet 5, which now matches much of Opus 4.8 capability at a fraction of the price according to fresh Anthropic Opus vs Sonnet pricing and capability comparisons. The model builds on Anthropic Claude model version history and performance benchmarks from the past year, where the company focused on safe and steerable systems. Traders watching AI infrastructure costs see immediate margin pressure on higher-tier inference spend.