Models Best AI for… Guides The best AI for coding Models that read whole codebases, plan changes across files and fix bugs. Top pick: Claude Opus 5. The best AI for writing Models for stories, essays, everyday emails and writing in other languages. Top pick: Claude Sonnet 5. The best AI for research Deep research reports, answers with sources, and what is happening right now. Top pick: o3 Deep Research. The best AI image generator Image models for posters with text, quick concepts, logos and precise edits. Top pick: GPT Image 2. The best AI for maths Reasoning models that work through problems step by step, even from a photo. Top pick: GPT-5.6 Sol. The best AI for long documents and PDFs Models with the room to read a whole contract, report or book at once. Top pick: GPT-5.6 Terra. The best AI for everyday questions Fast, free models for the small questions that make up most of a day. Top pick: Gemini 3.6 Flash. The best free AI The strongest free models, and exactly what the Free plan includes. Top pick: GPT-5.