Best Open-Source LLMs in 2026 (Self-Host or Use via API)

Best open-source LLMs in 2026. Compare Llama 3.1, Mistral, DeepSeek, Phi-3, and other open-weight models for self-hosting or cheap API access.

Open-source LLMs have reached the point where they are practical alternatives to proprietary APIs for many production workloads. The main use cases are: zero marginal cost when sel