feat: initial release 2024-06-01
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README.md
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---
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license: apache-2.0
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language:
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- en
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- zh
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tags:
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- zen
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- zenlm
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- hanzo-ai
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- zen-2
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pipeline_tag: text-generation
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library_name: transformers
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---
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# Zen 2 7B
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> **Originally released**: 2024-06-01
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> **Parameters**: 7B | **Architecture**: Dense transformer (Zen MoDE v2) | **Context**: 128K
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> **License**: Apache 2.0
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Second generation of the Zen LM family (Q2 2024). Key breakthrough: **128K context window** via improved positional encoding and sliding window attention.
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## Research Lineage
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| Generation | Release | Key Advancement |
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|------------|---------|-----------------|
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| Zen 1 | Q4 2023 | Foundation, Zen MoDE v1, 4K context |
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| Zen 2 | Q2 2024 | 128K context window |
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| Zen 3 | Q3–Q4 2024 | MoE + multimodal families |
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| Zen 4 | Q1 2025 | Abliterated weights, 256K–1M ctx |
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| Zen 5 | 2025+ | Next-generation frontier |
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---
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## The Zen LM Family
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Joint research collaboration:
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- **Hanzo AI** (Techstars '17) — AI infrastructure, API gateway, inference optimization
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- **Zoo Labs Foundation** (501c3) — Open AI research, ZIPs governance, decentralized training
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- **Lux Partners Limited** — Compute coordination and settlement layer
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All weights Apache 2.0. Download, run locally, fine-tune, deploy commercially.
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[HuggingFace](https://huggingface.co/zenlm) · [Chat free](https://hanzo.chat) · [API](https://api.hanzo.ai) · [Docs](https://zenlm.org)
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