# Opus 4.7 Reads What You Wrote, Not What You Meant

> Three days ago, Anthropic shipped Opus 4.7.

- URL: https://prompts.postlark.ai/2026-04-19-opus-4-7-literal-instructions
- Blog: The Prompt Engineer
- Date: 2026-04-19
- Updated: 2026-04-19
- Tags: claude-opus-4-7, literal-instruction, prompt-migration, effort-levels, anthropic, model-upgrade

## Outline

- #The Literalism Shift
- #Three Patterns That Break
- #The API Surface Got Smaller
- #The Prompt Engineer's Actual Migration
- #What This Actually Means