Long Context

AI21 Labs

Jamba models, an agent-cost gateway and post-training from Tel Aviv

Kimi 月之暗面

Moonshot AI's assistant and open-weight K3 model with a 1M-token context

Magic.dev

Coding-model research lab; nothing released yet

MPT (MosaicML Pretrained Transformer)

MosaicML's 2023 commercially usable open LLMs, now a legacy family

Yi Model

01.AI's open bilingual models, frozen since 2024; the paid API closed in 2026