Transformer

Transformers are a neural network architecture that revolutionized AI by using self-attention mechanisms to process sequential data in parallel.

Key Innovation

Unlike previous architectures (RNNs, LSTMs), transformers:

• Process entire sequences simultaneously
• Use attention to weigh relationships between all elements
• Scale efficiently with more compute and data

How Attention Works

The model learns to focus on relevant parts of the input when generating each output token—like how you might re-read earlier sentences to understand context.

Impact

Introduced in 2017, transformers now power:

• Language models: GPT, Claude, Gemini, Llama
• Image generation: Vision Transformers (ViT)
• Multimodal AI: Models handling text, images, audio

Why It Matters

Transformers enabled the scaling laws that make modern AI possible—more parameters and data yield predictably better performance.