9 Best Open-Source LLMs of 2026 Compared: Kimi K3 Tops List

Kimi K3, with 2.8T parameters and 1M context, ties Claude Opus 4.8 on the AI Index but its weights aren't yet released. GLM-5.2 offers MIT-licensed value at $1.40/$4.40 per million tokens, while DeepSeek V4 Pro provides frontier performance for under $1 per million output tokens. The ranking covers nine models on license, context window, hardware needs, and per-token pricing.