---
id: "concept-literal-instruction-following"
type: "concept"
source_timestamps: ["00:00:00"]
tags: ["prompt-engineering", "model-behavior", "developer-experience"]
related: ["action-front-load-intent", "claim-combative-model", "prereq-prompt-engineering"]
definition: "A model behavior where instructions are executed exactly as written without inferring unstated intent, prioritizing strict adherence over helpful assumptions."
sources: ["s12-opus-47"]
sourceVaultSlug: "s12-opus-47"
originDay: 12
---
# Literal Instruction Following

## Definition

A model behavior where instructions are executed exactly as written without inferring unstated intent, prioritizing strict adherence over helpful assumptions.

## Detail

[[entity-claude-opus-4-7-d12|Opus 4.7]] represents a significant shift from its predecessor, 4.6, by adopting a highly literal approach to instruction following. Where 4.6 would often infer unstated user intent, fill in gaps, and make generous assumptions about formatting or output structure, **4.7 executes exactly what is written in the prompt — no more, no less.**

### Concrete Example

If a user asks for a three-sentence summary without specifying formatting, 4.7 will provide exactly three sentences — stripping away headers, bullet points, or conversational filler that 4.6 might have included.

## Why It Matters

- **For programmatic pipelines**: Literalness makes the model highly predictable and reliable for automated workflows where strict adherence to constraints is critical.
- **For casual users**: Makes the model feel 'dumber' or less helpful — see [[contrarian-literal-feels-dumber]].
- **For prompt engineers**: Forces exhaustive explicitness about success criteria, constraints, and desired output formats. The prompting meta for Anthropic's frontier model has fundamentally changed.

## Operator Response

Follow [[action-front-load-intent]]: state context, constraints, and exact formatting requirements at the **very beginning** of the prompt. Do not rely on the model to infer.

## Cross-References

- Action: [[action-front-load-intent]]
- Claim: [[claim-combative-model]]
- Prerequisite: [[prereq-prompt-engineering]]
- Contrarian: [[contrarian-literal-feels-dumber]]
- Quote: [[quote-smartest-combative]]