Claude Sonnet 5, launched June 30, 2026, is a cost-efficient AI model at $2/million input tokens that nearly matches flagship Opus 4.8 on coding and reasoning, making it ideal for running autonomous agents at scale.

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Anthropic launched Claude Sonnet 5 on June 30, 2026, a mid-tier AI model built for running autonomous agents at lower cost. At $2 per million input tokens, it nearly matches the flagship Opus 4.8 on coding and reasoning tasks, giving developers a powerful, affordable option for running AI agents around the clock.

Anthropic launches Claude Sonnet 5, a cheaper agent model

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