Best AI for writing

Writing is probably the most obvious use case for language models, yet paradoxically the hardest to evaluate. Because while in coding a test either passes or fails, a good text reveals itself only in the second half, when the model starts repeating itself, losing tone, or sliding into artificial, calque-from-English syntax. That's why for this category I chose five models that actually deliver finished text, not just correctly complete a sentence. Don't treat this as a ranking from best to worst, though-it's more of a map where each model sits in its own place.

What to look for when choosing? First, the length of the form. If you're writing an email, summary, or post, what counts is natural English and speed, and here everyday work comes out smooth almost everywhere. But when you move into long forms-an article, a chapter, extensive editing-maintaining consistent tone and structure across many thousands of words without drifting apart becomes crucial. That's a completely different skill, and here the differences between models become significant. Second, how much material you're feeding into the work. If you're editing based on an entire report, contract, or transcript, you need a large context window so the model can see the whole thing at once, instead of working on chopped-up fragments.

When to use which? For the longest, most demanding texts and editing of extensive documents, I reach for the model that best maintains style over distance and carefully draws conclusions instead of making things up. For everyday, universal writing, where I want one tool for emails, summaries, and tone changes, the most versatile generalist with natural English works great. When I'm working around email and documents or editing based on fresh data from the web, the model plugged into an ecosystem and search engine wins. If I'm pushing large volumes of text through an API and cost matters, I choose a cheap model with a good quality-to-price ratio. And when I'm writing about current events and moods, access to real-time content and a looser tone comes in handy.

My advice: don't look for one master of everything. For long form, take a tool that doesn't tire out halfway through; for everyday use, one you have at hand and that writes naturally in English. Choosing a model for a specific task will give you more than stubbornly sticking to one, because each of these five has its own terrain where it's simply better.