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零一万物01.AI

Efficient bilingual frontier models

Model

1

+1 deprecated

Founded

2023

Country

China

Beijing

01.AI has been building models out of Beijing, China, since 2023. Webparam tracks two of its models, spanning language: free to call and reaching 64K.

Models

The 01.AI catalogue

Ordered by weekly usage on Webparam.

  • Yi Lightning by 01.AI
    01.AIOn request

    Yi Lightning

    01ai/yi-lightning

    Speed-first bilingual model: symmetric pricing and sub-second answers for interactive products.

    LanguageTool callingJSON modeStreaming

    64K ctx · Free

  • Yi Large by 01.AI
    01.AIDeprecated

    Yi Large

    01ai/yi-large

    First-generation flagship, now deprecated, retained for reference and migration guidance.

    LanguageTool callingStreaming

    32K ctx · Free

Recent releases

What shipped lately

    Founded by Kai-Fu Lee, 01.AI focused on extracting maximum capability per parameter, its Yi models punched far above their size class in bilingual benchmarks. The lab has since concentrated on the fast, inexpensive Yi-Lightning line for production workloads.

    Strengths

    • Excellent capability-per-parameter efficiency
    • Strong bilingual (EN/ZH) performance
    • Production-focused pricing

    Use 01.AI models through Webparam

    Every model above is callable through one OpenAI-compatible convention: change the model ID, keep the request.

    Chat completions reference →Yi Lightning model details →

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