THE CONTEXT WINDOW HAS BEEN SHATTERED: SUBQUADRATIC DEBUTS A 12-MILLION-TOKEN WINDOW

Summary from the TLDR AI newsletter

Subquadratic has launched a new AI model with a 12-million-token context window. It outperforms GPT-5.5 on retrieval benchmarks. Attention cost scales quadratically with context length, so doubling the input quadruples the work. Subquadratic claims to have solved the problem. It plans to offer a model with a 50-million-token context window soon.