Z.ai: GLM 5.3 FlashX — pricing & benchmarks

By z-ai · Updated 2026-11-01 · Reads imageslong-context / RAGreads images / documentsstep-by-step reasoning

What Z.ai: GLM 5.3 FlashX is used for

Z.ai: GLM 5.3 FlashX is best suited for long-context / RAG, reads images / documents, step-by-step reasoning. Access it through one Appmo API key alongside 444 other models — Appmo's optimizer can route to it automatically when it is the best value for a request.

What people are saying (last 30 days)

Not enough posts yet to judge community sentiment. 1 new GitHub repos mentioning it. How we measure this.

Use it via the Appmo API (OpenAI-compatible)

curl https://appmo.com/v1/chat/completions \
  -H "Authorization: Bearer $APPMO_KEY" \
  -d '{"model":"z-ai/glm-5.3-flashx","messages":[{"role":"user","content":"Hello"}]}'

FAQ

How much does Z.ai: GLM 5.3 FlashX cost?
Z.ai: GLM 5.3 FlashX costs $0.37 per 1M input tokens and $1.25 per 1M output tokens ($0.59 blended), as of 2026-11-01. Prices are expected to fall as competition increases.

What is Z.ai: GLM 5.3 FlashX best for?
Z.ai: GLM 5.3 FlashX is best suited for long-context / RAG, reads images / documents, step-by-step reasoning.

How do I use Z.ai: GLM 5.3 FlashX?
Send requests to Appmo's OpenAI-compatible endpoint with model id "z-ai/glm-5.3-flashx" and one API key — no separate provider account needed.

Is Z.ai: GLM 5.3 FlashX open source?
We have no record of public weights for Z.ai: GLM 5.3 FlashX; treat it as a closed model available only through its provider's API.

Can Z.ai: GLM 5.3 FlashX create images?
No. Z.ai: GLM 5.3 FlashX can read and understand images, but it only writes text.