Yi 34B

Yi 34B is 01.AI's 34-billion-parameter bilingual English-Chinese language model. 01.AI released Yi-34B in November 2023 and also published a Yi-34B-200K extended-context variant for long-document work. The model uses a decoder-only transformer architecture trained independently from scratch; it is similar in shape to Llama-style systems but is not derived from Meta's weights. The practical reason to consider this row is long bilingual context at a 34B scale. Yi 34B was competitive for its release era on English and Chinese evaluation sets, and it remains useful as a historical baseline for Chinese/English long-context comparisons. It is not the first model to reach for when maximum current reasoning quality matters, but it can still be relevant for teams comparing older open-model deployments or reproducing Yi 1.x results. Treat provider availability and context limits as implementation details to verify before deployment, while this page's model-level summary should be read as the 200K-context Yi 34B entry.