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Models › z-ai › Z.ai: GLM 5.3 Prime

Z.ai: GLM 5.3 Prime — pricing & benchmarks

By z-ai · Updated 2026-07-24 · long-context / RAGstep-by-step reasoning

Z.ai: GLM 5.3 Prime costs $2.8 per 1M input tokens and $8.8 per 1M output tokens, with a 1M context window. It is best suited for long-context / RAG, step-by-step reasoning, and is available through one OpenAI-compatible Appmo API key.
$2.8Input / 1M
$8.8Output / 1M
1MContext
—Intelligence
—Coding
—GPQA %
—Speed tok/s

What Z.ai: GLM 5.3 Prime is used for

Z.ai: GLM 5.3 Prime is best suited for long-context / RAG, step-by-step reasoning. Access it through one Appmo API key alongside 451 other models — Appmo's optimizer can route to it automatically when it is the best value for a request.

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-prime","messages":[{"role":"user","content":"Hello"}]}'

FAQ

How much does Z.ai: GLM 5.3 Prime cost?
Z.ai: GLM 5.3 Prime costs $2.8 per 1M input tokens and $8.8 per 1M output tokens ($4.3 blended), as of 2026-07-24. Prices are expected to fall as competition increases.

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

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