Microsoft Copilot (with GPT-4 Turbo)

Microsoft Copilot provides robust, free access to OpenAI's GPT-4 Turbo and DALL-E 3 models. Its key advantage is deep integration into Windows 11, the Edge browser, and Microsoft 365 (as Copilot Pro). Features include a generous free daily boost limit, image generation via Designer, web grounding with citations, and a soon-to-be-released 'Recall' feature for PC activity memory. It serves a broad audience from general Windows users to professionals using Office.

Its top-tier score is driven by its exceptional value (powerful free tier), seamless OS-level integration, and strategic position as an AI layer across Microsoft's vast software portfolio.