On October 23, 2026, Moonshot AI released Kimi K3.1 Pro, a 3T-class open-weight model built from heavy post-training of K3: it beats GPT-6 Astra on Terminal-Bench 4.0 and cuts its hallucination rate by nearly three times, without adding a single parameter. Full weights land on November 4 — a window to plan around for anyone who self-hosts.
On September 2, 2026, Alibaba shipped Qwen3.8-Max-0902, a post-trained snapshot of Qwen3.8-Max that climbs to 1,691 on CodeArena without touching its 2.4-trillion-parameter base. Teams evaluating coding agents now have to track a cadence of dated snapshots rather than model launches.
On August 14, 2026 Z.ai released GLM-5.3, an open-weights model whose cyber capability doubled through post-training alone, with no change to the base model. The weights ship in two weeks — plan for what that means for your offensive and defensive teams.
On July 31, 2026, DeepSeek upgraded its V4 Flash model through re-post-training alone, with zero architecture changes. The result: the smaller 13B active parameter model now outperforms the larger V4 Pro on nine coding benchmarks.
