Australian AI lab Maincode has released a new family of language models called Matilda Platypus, which utilize a technique called Model Stitching. These models connect the lower layers of a larger pre-trained Qwen 3 model with the upper layers of a smaller one, using a learned Representation Bridge to align their hidden representations. The models range in size from 1.5B to 13B parameters and are available as base models, with early tests showing promising results and a favorable default tone. AI
IMPACT Introduces a novel model-stitching technique for creating intermediate-sized language models.
RANK_REASON Release of new fine-tuned language models from a non-frontier lab. [lever_c_demoted from research: ic=1 ai=1.0]
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