$\infty$-former (SM) is an AI model developed by Universidade de Lisboa (ULisboa) and DeepMind (Portugal and United Kingdom), first published in September 2021. It works in the language domain, on tasks such as language modeling/generation.
Training it took an estimated 1.2×10²² FLOP of compute (estimation method: operation counting). The model has 124,000,000 parameters. It was trained on roughly 200M datapoints. Training ran on 1 NVIDIA GeForce RTX 2080 Ti 11GB.
Access: Unreleased. Its weights are not openly released. It is built on top of GPT-2 (124M). The reference paper has 31 citations. Epoch AI rates the confidence of this record as speculative.