GLM-5.1 (Baidu)

GLM-5.1 appears in third-party pricing aggregator indexes under a Baidu-labeled route, where it was tracked with a notable price drop in mid-September 2026 alongside other members of the GLM family. No creator-issued release notes, model card, or technical report for this exact version appears in the supplied evidence, so its architecture, parameter count, training approach, and benchmark standing cannot be confirmed from these sources. The only externally corroborated fact is the existence of the listing itself on apipriceindex.com, which is a gateway-pricing reference rather than a Baidu-authored disclosure.

Because no primary documentation is available in the supplied evidence, no qualitative claims about reasoning quality, tool-use behavior, long-context handling, or specific strength areas can be made for GLM-5.1. The listing context (a text-to-text endpoint with open weights) suggests it is positioned as a general-purpose language model within the broader GLM family, alongside sibling versions such as GLM 5.2, GLM 5.3, and GLM 5.3 Flash that appear in the same aggregator. Practical assessment of fit for reasoning-heavy or agentic workloads will require consulting Baidu's own published materials, which were not returned in the supplied evidence.