Anthropic Claude Sonnet 5 vs Sonnet 4.6 vs Opus 4.8: Agentic Coding Benchmarks, API Pricing, and Cost-Performance Tradeoffs Compared

- Anthropic’s Claude Sonnet 5 is here, and it’s aggressively closing the gap to Opus 4.8 on agentic coding benchmarks. It’s cheaper, faster, and apparently better at not losing context than your average moonboy losing his stack-eye over a rug pull. Intro pricing is a steal, but don’t get too comfortable; the tokenizer change means you’re burning tokens faster than a Core Dynamics audit. It’s the new standard for mid-tier agentic work, leaving Haiku for latency junkies and Opus for when accuracy actually matters. If you’re still paying premium rates for 4.6, you’re just funding someone else’s hash manifest. Adapt or get left in the dust.