LLM Engineering •
Claude Opus 5: Benchmarks, Pricing & Two Breaking Changes
Claude Opus 5 delivers near-Fable capability at Opus 4.8's price. Benchmarks, the real cost math, and the two API changes that break a migration.
11 min read
Read more →Claude Opus 5 delivers near-Fable capability at Opus 4.8's price. Benchmarks, the real cost math, and the two API changes that break a migration.
Claude Sonnet 5 gives near-Opus coding at Sonnet pricing, but a tokenizer change alters your real cost. Benchmarks, pros, cons, and when to pick it.