Refresh every entry against live sources as of Sep 29, 2026. Remove
GitHub Models, xAI, LongCat, Volcengine Ark free tier, Baidu Qianfan and
Empero, which no longer offer a free tier or are offline. Add Volcengine
Ark Coding Plan, Atlas Cloud, NanoGPT, Tencent TokenHub, Alibaba free
quota, Z.ai free Flash models, Nebius Token Factory and Novita. Replace
footnote check-dates with a closing Checked line and document that in
CLAUDE.md.
