MODELS
Yi-34B
01.AI's bilingual open-weights model — strong English + Chinese in one stack.
Specs
- Context window
- 200,000
- Max output
- 4,096
- Modalities
- text
- Tool use
- —
- Vision
- —
- Streaming
- ✓
- License
- yi-license
- Released
- 2023-11-06
Pricing
Yi-34B (November 2023) is 01.AI's open-weights bilingual model — Kai-Fu Lee's company, 34B parameters with native 4K context (extended versions reach 200K). Yi was the first Chinese open-weights model to consistently top open leaderboards, beating Llama 2 70B at half the size. Strong on both English and Chinese (Mandarin) benchmarks. Custom Yi licence (commercial-friendly with registration).
Editor's verdict
Historically important — Yi-34B was the model that made global AI take Chinese open-source seriously. By 2026 it's outclassed by Qwen 2.5 72B and DeepSeek V3 on every benchmark, and the licence (with registration) is friction Apache-2.0 alternatives don't have. Pick Yi-34B for Chinese / English bilingual workloads only if you specifically need this exact build for reproducibility; for new builds, Qwen or DeepSeek wins.
Reviews
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Last updated: 2026-04-29