arxivcs.LGcs.CLcs.PF2026-07-23
Windowed-MTP: Removing the Full-Context Draft-KV Tax at Million-Token Context
Speculative decoding accelerates autoregressive generation by having a cheap draft propose tokens that a target verifies in parallel. Frontier models increasingly ship a built-in Multi-Token-Prediction (MTP/NEXTN) draft head under the assumption that the draft is negligibly cheap…