Best for a task
What's the best AI model for writing?
The models that sound human and finish your thoughts.
What writers need
Writing needs tone, flow, and original voice. A model must adapt to your style, catch repetition, and know when to be formal vs casual. Its job is to finish your thoughts in your voice.
Claude for writing
Claude is thoughtful and clear. It asks clarifying questions before drafting. It produces well-reasoned essays, explanations, and marketing copy.
It fits long-form content, essays, and writing that starts from scratch.
GPT for writing
GPT is faster and more versatile. It is good for editing, rewriting, and tight deadlines, and it can juggle multiple voices.
It fits quick drafts, editing, and stylistic variation.
For both: use mid-tier first
Sonnet and GPT-5.6 Terra (not the flagships) are fast enough and cheap enough for everyday writing. Upgrade to a flagship if you're iterating on something that needs to be perfect.