I've used GLM-s the longest with Claude Code and their Anthropic supplied endpoint. As per their docs

$ ANTHROPIC_BASE_URL="https://api.z.ai/api/anthropic" ANTHROPIC_AUTH_TOKEN="zai-api-key" claude --dangerously-skip-permissions

Lately I use Zai in omp (oh-my-pi). It's listed built-in provider can be selected without configs shenanigans. Fits in the overall setup e.g. can select GLM-5.2 (now 5.3), and assign it role [plan] or [advisor]. I got reminded now of glm-5v-turbo. Think that 'v' was for vision. Assigned it role [vision] in omp now, let's see what happens. :-)

I am using GLM on Pi without any issues. You just create an API key.

Started recently though, mostly been using GLM 5.2 for planning with DeepSeek V4-flash for implementation.

I use it with random harnesses. It behaves consistently.