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**Disclaimer: All the paragraphs are written by a human. The table is generated by AI with supervision from a human.** Enter, GPT-6 Astra. The Information [reports](https://www.theinformation.com/articles/secret-technique-behind-openais-astra-model-sparks-security-concerns) it uses a looped transformer architecture. It's a significant improvement over GPT5.6. This is the model that people say we've entered the AGI era. LLMs have layers of data, called weights. During inference, **each layer gets computed** **once**. So moving weights from HBM memory to the chip is a major bottleneck because to generate …