What AI Model Should I Use? The 2026 Guide to ChatGPT, Claude, Gemini, and Grok

Here is the state of play as of July 27, 2026, across all four major assistants: every sub-model, real pricing, and who should actually use what.TL;DR: the short answersMost people should start free. ChatGPT, Claude, Gemini, and Grok all have credible free tiers. Gemini's remains the most generous, …