Reflection Beam and Mistral Large 4 Debut Together: More Open-Weight Options, but Weights and Licenses Still Pending
According to an October 2026 report from InfoQ Chinese, US-based Reflection released Beam, its first open-weight MoE model, on October 5–6, one day before France's Mistral launched Mistral Large 4, its largest model to date. The report says Beam's selling point is inference efficiency, with some benchmarks approaching GLM-5.2 but trailing China's latest generation; Large 4 is available in API preview, with full weights planned for late October release. Neither version is currently listed on KimiSeek.