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Bonsai 2 27B

PrismMLOpen WeightsPending Human Review

Bonsai 2 27B is PrismML’s second-generation vision-language flagship, derived from Qwen3.8-27B. Ternary language weights and a hybrid linear/full-attention backbone reduce deployment footprint while retaining language reasoning, coding, image understanding, and agent-oriented capabilities. The current card specifies 27.36B total parameters, 262K context, and two GGUF packing formats; the vision encoder ships separately. Apache-licensed weights became available September 17. The September 24 smart-glasses coverage concerns deployment of Bonsai technology rather than a new named checkpoint. Compression quality and throughput claims depend on evaluation setup, hardware, packing, and runtime support.

2026-09-17
27.36B
Ternary hybrid-attention vision-language Transformer
Apache-2.0

Specifications

Parameters
27.36B
Architecture
Ternary hybrid-attention vision-language Transformer
License
Apache-2.0
Context Window
262,144 tokens
Type
multimodal
Modalities
textimage

Benchmark Scores

Advanced Specifications

Model Family
Bonsai
Finetuned From
Qwen3.8-27B
API Access
Not Available
Chat Interface
Not Available
Variants
PTQ1_0 (dense trits)PQ2_0 (2-bit slots)GGUFMLX 2-bit

Capabilities & Limitations

Capabilities
visionreasoningcodingagentic language generationlocal inference
Known Limitations
Image support requires the separate vision encoder packageFull context raises runtime memory beyond packed-weight sizeCurrent packings require compatible specialized inference support
Notable Use Cases
private multimodal assistantslocal coding agentslong-document analysis
Tool Use Support
Yes

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