[missing-model] zai-coding-plan: glm-5.3-flashx #8058

Missing model

glm-5.3-flashx is present under the standard zai provider but absent from zai-coding-plan.

Source

• Z.AI docs (GLM-5.3-Flash / GLM-5.3-FlashX share one page): https://docs.z.ai/guides/vlm/glm-5.3-flash
• GLM-5.3-FlashX launched 2026-09-18 as the high-speed serving tier of GLM-5.3-Flash (same weights, up to 200 tok/s output).
• Existing catalog entry with full metadata: https://models.dev/api.json → .["zai"].models["glm-5.3-flashx"]

Suggested zai-coding-plan entry

Same metadata as the existing zai/glm-5.3-flashx entry, with plan pricing:

• Model ID: glm-5.3-flashx
• Name: GLM-5.3 FlashX
• Modalities: input text, image, video, pdf / output text
• attachment: true, tool_call: true, reasoning: true
• Limits: context 1,000,000 / output 131,072
• Cost: 0 (plan access is points-based; standard-API list price is $0.37 / $1.25 per 1M input / output)

Note

Z.AI docs currently state that GLM-5.3-FlashX is not yet available on the GLM Coding Plan. Filing this so the entry is ready when Z.AI enables it, and so users granted early access can select it in coding tools. Happy to send a PR against dev if that is the preferred route.