Q-Former
q-former-ed9e31d2·2 events·first seen 28d agoAliases: Q-Former, ><former
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Variable-Width Transformers: X-shaped architecture outperforms uniform-width baselines with 22% fewer FLOPs
Researchers propose the ><former (X-shaped transformer), a decoder-only architecture that uses wider early and late layers with narrower middle layers, implemented via a parameter-free residual resizing mechanism. Evaluated on models from 200M to 2B dense parameters and 3B MoE, the architecture consistently outperforms parameter-matched uniform-width baselines on language modeling loss. The design yields a 22% reduction in FLOPs and 15% reduction in KV cache memory under fitted scaling curves, suggesting nonuniform width allocation is a viable path to more compute-efficient language models.
Zero-shot image-to-text generation with BLIP-2
Hugging Face published a blog post introducing BLIP-2, a multimodal model that enables zero-shot image-to-text generation by bridging frozen image encoders and large language models via a lightweight Querying Transformer (Q-Former). The post covers the model's architecture, capabilities, and how to use it via the Hugging Face Transformers library. BLIP-2 achieves strong performance on visual question answering and image captioning tasks without task-specific fine-tuning.