DeepSeek

DeepSeek is the open-source reasoning model from China that stunned the AI world by matching leading proprietary models at a fraction of the training cost. Its chat interface offers a strong free tier, long context, and web search support.

It is especially good at math, logic, and code — the reasoning-heavy tasks where smaller models usually fail. The open weights mean you can run it locally or through a third-party provider with full control.

For developers and power users who want a genuinely capable model without paying subscription fees, DeepSeek is one of the smartest free options available today.