Best AI for proofreading
As of 2026-07-18, Anthropic: Claude Opus 4.8 (Fast) is the strongest model for this task in our daily benchmark, where over 350 AI models are evaluated and the best are presented.
Proofreading is where AI delivers the most value at the least risk: the text is already yours, the model just has to find the errors. But it genuinely has to know the language — a model with weak grasp will “correct” correct Norwegian into incorrect Norwegian.
We rank by language quality, which is the direct measure of whether a model can correct the language at all. Ranked by language score, from today’s benchmark.
Today’s ranking
| Model | Provider | Score | Language | Speed | Input price/1M |
|---|---|---|---|---|---|
| Anthropic: Claude Opus 4.8 (Fast) | anthropic | 8.3/10 | 9.3/10 | 131 t/s | $10.00 |
| Anthropic: Claude Haiku 4.5 | anthropic | 8.0/10 | 9.3/10 | 113 t/s | $1.00 |
| Google: Gemma 3 4B | 8.0/10 | 9.3/10 | 237 t/s | $0.05 | |
| Cohere: Command R+ (08-2024) | cohere | 7.5/10 | 9.3/10 | 160 t/s | $2.50 |
| Perplexity: Sonar Pro | perplexity | 7.7/10 | 9.0/10 | 68 t/s | $3.00 |
| Meta: Llama 3.1 8B Instruct | meta-llama | 5.2/10 | 9.0/10 | 392 t/s | $0.05 |
| Mistral: Mistral Small 3 | mistralai | 7.8/10 | 8.7/10 | 234 t/s | $0.05 |
| IBM: Granite 4.0 Micro | ibm-granite | 5.4/10 | 8.3/10 | 179 t/s | $0.02 |
Ask for correction, not rewriting
The default behaviour of most models is to rewrite the whole text in their own style. Be explicit: “Correct spelling, punctuation and grammar only. Keep the wording and sentence structure.” Asking it to list the changes shows you what was actually done.
What AI misses
Models are good at commas, agreement and compound words. They are weaker on factual errors, internal contradictions and whether the text actually works for the reader. Proofreading is not the same as editing.
Frequently asked questions
Other tasks
Doing something else? See which model is best for it.
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