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ChatGPT 4o (GPT-4o) is OpenAI's flagship multimodal AI model, available for free in 2026. This complete tutorial covers everything from account registration and model selection to the 6 core features, a comparison of Free vs. Plus vs. Pro plans, 10 practical use cases, and 5 advanced tips to help you master ChatGPT 4o.

Is ChatGPT still free in 2026? Here's the complete breakdown — what the free plan includes, its limitations, how it compares to Plus and Pro, and tips to maximize your free usage.

The most complete Gemini vs ChatGPT 2026 comparison! From features, multimodality, search integration, coding, and pricing to real-world testing, understand which AI is better for you in one article.