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Hunyuan A13B Instruct

Tencent

Released
June 27, 2025
Data date
September 8, 2026
Price
Input · Output / 1M tokens
Input
Text
Output
Text

Hunyuan A13B Instruct separates fast and slow thinking in a sparse 80-billion-parameter model with about 13 billion active per token. Fine-grained mixture-of-experts routing and grouped-query attention keep active compute limited. For agents, the model card documents a specialized vLLM parser for tool calls and internal reasoning steps.

The official model card shows a 32,768-token default configuration. Tencent publishes the weights and documents deployment through vLLM, SGLang, and TensorRT-LLM.

Specifications and access

SpecificationValue and source
Weights
Open weightsSource
Access
API, LocalSource
Parameters
Active parameters
Context window
262,144 tokensSource
License
Tencent Hunyuan A13B licenseSource
Release
2025-06-27 (Tencent Cloud's hosted hunyuan-a13b API launch is dated 2025-06-25; this record tracks the exact open-weight checkpoint release instead.)Source
Parameters
80 BSource
Active parameters
13 BSource
Architecture
fine-grained sparse MoE with GQA; hybrid fast and slow thinking modesSource
Default context window
32,768 tokensSource
Input
TextSource
Output
TextSource
Reasoning mode
hybrid slow-thinking and fast-thinking modesSource
Tool calling