Alibaba Bailian Coding Plan (百炼 Coding Plan)
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Key prefix: sk-sp-
Endpoint:   https://coding.dashscope.aliyuncs.com/v1
Auth:       Bearer
Usable keys: 5

This is SEPARATE from regular DashScope paygo keys (sk-<32hex>) at
dashscope.aliyuncs.com. Coding plan keys only work on coding.dashscope.
Coding plan includes qwen3-coder, qwen3-max, glm-4.7/5, kimi-k2.5,
MiniMax-M2.5 — all 10 catalog models confirmed on these keys.