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Opus 5.5 cuts token and cache costs, but changes thinking, tool selection and conversation handling. Validate the integration first, then measure cost per completed task.

Claude Fable 5.1 cuts prompt-cache reads to $0.25 per million tokens and adds finer agent controls. It also brings three breaking changes that need testing before production.

Fable 5 is available again after the June suspension. For companies, that does not mean using it everywhere. It belongs in a model router as an expensive specialist with budget control, fallback, and audit.

Anthropic released Claude Opus 4.8. A practical look at agents, coding, research, 1M context, fast mode, benchmarks, and pricing.

Anthropic vydal 16. dubna 2026 novou verzi Opus. Lepší kódování, task budgets, 3,75 MP obrázky. Tady je praktický přehled—co tomu svěřit dnes a kde si ještě počkat.