Blog · March 7, 2026 · 8 min read

Human vs AI editing: a side-by-side comparison

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We took an 1,800-word chapter and edited it twice: once with a leading large language model, once with a senior human editor. The differences were stark.

What the LLM did

Smoothed sentences competently. Introduced four factual errors by 'tidying' specific claims. Removed nuance from three hedged statements. Standardised voice into generic academic prose.

What the human did

Fixed all typos. Suggested two structural moves with explanations. Preserved every hedge. Flagged one citation as needing verification. Left a summary memo noting recurring sentence-length issues.

Frequently asked questions

Why did the AI introduce errors?

LLMs default to fluency over fidelity. When a sentence is unclear, they guess — confidently.

Is hybrid AI + human editing safer?

Only if the human reads every change. Most 'AI-assisted' services don't — which means AI errors reach you.

Read every change, by a real editor

100% human editing. Tracked changes you can trust. Summary memo with every job.

professional proofreading service UK

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