# Tagged code-model

> Announcements and real-world deployments of AI, checked against their sources and scored: open-weights releases, decision models in the wild, and what is actually in use.

- [Reflection releases Beam, a 501B open-weights MoE under Apache 2.0](https://shipped.anth.us/open-weights/reflection-beam-1-0-501b-a23b/index.md): Beam is Reflection's first open model: 501B total and 23B active parameters, 1M-token context, under Apache 2.0. (2026-10-07)
- [JetBrains releases Mellum2.1 Thinking, a 12B coding MoE with 2.5B active, under Apache 2.0](https://shipped.anth.us/open-weights/jetbrains-mellum2-1-12b-a2-5b-thinking/index.md): Mellum2.1 Thinking is a 12B mixture-of-experts reasoning model with 2.5B active, retrained mostly with reinforcement learning on real repositories. (2026-09-20)
- [Z.ai releases GLM-5.3, a 753B open-weights model aimed at coding and cyber tasks](https://shipped.anth.us/open-weights/zai-org-glm-5-3/index.md): GLM-5.3 reuses the GLM-5.2 base with new post-training. The weights are public under a custom glm-5.3 licence. (2026-08-25)