Next steps

Behavioral differences and prompting patterns for Claude Fable 5.1, covering effort, task completion, progress updates, thinking blocks, tool-call batching, and writing style.

Behavioral differences and prompting patterns for Claude Fable 5 and Claude Mythos 5, covering effort, instruction following, long runs, memory, and scaffolding changes.

Behavioral differences and prompting patterns for Claude Sonnet 5, covering effort, adaptive thinking defaults, tool use, and migration from Claude Sonnet 4.6.

Behavioral differences and prompting patterns for Claude Opus 5, covering response verbosity, agentic narration, task scoping, subagent delegation, and self-correction.

When to use prompt engineering and how to plan your approach before tuning prompts.