guide
Claude Fable 5: What It Is, How to Use It, and the Prompts That Exploit It
Anthropic's first public Mythos-class model, explained with sources: pricing, safeguards, benchmarks, access methods, real use cases, and copy-paste prompts.
comparison
Opus 4.8 Cost Calculator: When It Beats Sonnet & GPT-5.5
Opus 4.8 API cost calculator vs Sonnet 4.6, Haiku 4.5, GPT-5.5. Break-even workloads, smart-routing saves ~32%, per-model cache rates. Any currency.
