GLM Flash LatestZ.ai
This model always redirects to the latest model in the GLM Flash family.
Context 1MIn $0.0471 · Out $0.12 /1M
Specs
Model ID
z-ai/glm-5.3Context window1M tokens
Max output944K tokens
Input price$0.079 / 1M tokens
Output price$1.40 / 1M tokens
Inputs → outputsText → Text
Open weightsYes
How to use GLM 5.3 in your app
The quickest way is through an API gateway such as OpenRouter, which uses the same format as the OpenAI API. Create a key, then send a request with the model ID z-ai/glm-5.3:
curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "z-ai/glm-5.3",
"messages": [{"role": "user", "content": "Explain this in simple words..."}]
}'
Prefer no code? Many tools in our AI tools directory run on models like this one.
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Open weightsGLM LatestZ.ai
This model always redirects to the latest GLM model from Z.ai.
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GLM 5.2Z.ai
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Open weightsQuestions about GLM 5.3
What is GLM 5.3?
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...
How big is the context window of GLM 5.3?
GLM 5.3 can read up to 1,048,576 tokens in one request, roughly 786,432 words.
How much does GLM 5.3 cost?
Through OpenRouter, GLM 5.3 costs about $0.079 / 1M tokens for input and $1.40 / 1M tokens for output. Prices change, so check before large jobs.
Is GLM 5.3 open source?
GLM 5.3 has open weights, so you can download and run it yourself, subject to its licence.
What can GLM 5.3 take as input?
GLM 5.3 accepts text and produces text.
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NewSpecs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 18 Aug 2026.