GLM 5.3 Prime
Access GLM 5.3 Prime through one API key. Z.ai GLM 5.3 High-Speed Flagship.
GLM 5.3 Prime is the high-speed variant of Z.ai's GLM 5.3, inheriting its full capabilities while delivering 1.5 to 2 times the output throughput through inference acceleration. Prime is for interactive coding and agent work on GLM's flagship where speed is worth paying for; plain GLM 5.3 gives the same capability at a much lower rate for batch work.
No credit card required. Takes 30 seconds.
2,400+
Developers
1.2M+
API calls served
100+
Endpoints
$0.01
Per call
Yep, that's it.
Try it live
Send a message and see GLM 5.3 Prime respond in real time.
Maximum tokens in the response.
Real-time tokens
Context Window
1M tokens
Max Output
131K tokens
Input Price
$4.14 / 1M tokens
Output Price
$13.00 / 1M tokens
Strengths
Full GLM 5.3 capability with 1.5–2× the output throughput.
GLM 5.3 targets complex coding and long-horizon agent tasks.
Handles up to 1,000,000 input tokens and returns up to 131,072 output tokens per call.
Function calling and JSON schema outputs.
Quick start
Copy this snippet and start making calls with GLM 5.3 Prime.
const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"model": "z-ai/glm-5.3-prime",
"messages": [
{
"role": "user",
"content": "Explain API gateways in 2 sentences."
}
],
"maxTokens": 256
}),
});
const { data } = await res.json();
console.log(data.message.content);Why use GLM 5.3 Prime through YepAPI?
GLM 5.3 Prime API — pricing, context window & access
GLM 5.3 Prime is the high-speed variant of Z.ai's GLM 5.3, inheriting its full capabilities while delivering 1.5 to 2 times the output throughput through inference acceleration. It pairs a 1,000,000-token context window with up to 131,072 output tokens per response, at $4.14 per 1M input and $13.00 per 1M output tokens through YepAPI.
Through YepAPI you call GLM 5.3 Prime on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text.
What is GLM 5.3 Prime?
GLM 5.3 Prime is the high-speed variant of Z.ai's GLM 5.3, inheriting its full capabilities while delivering 1.5 to 2 times the output throughput through inference acceleration. It supports text input and output with a 1,000,000-token context window and up to 131,072 output tokens at $4.14 / $13.00 per 1M tokens. It accepts text as input, handles up to 1,000,000 tokens of context and returns up to 131,072 output tokens per call.
Build with GLM 5.3 Prime via YepAPI
YepAPI serves GLM 5.3 Prime on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to glm-5.3-prime (or the full z-ai/glm-5.3-prime). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.
GLM 5.3 Prime API pricing — $4.14 / 1M input, $13.00 / 1M output
GLM 5.3 Prime costs $4.14 per 1M input tokens and $13.00 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs so you can see exactly what a 131,072-token response cost.
GLM 5.3 Prime use cases
Prime is for interactive coding and agent work on GLM's flagship where speed is worth paying for; plain GLM 5.3 gives the same capability at a much lower rate for batch work.
Try GLM 5.3 Prime free
Every new YepAPI account includes $5 in free credit with no card required — enough to test GLM 5.3 Prime on your own prompts before committing to paid usage. Create an account, copy your key, and call glm-5.3-prime right away.
Start generating in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
GLM 5.3 Prime is the high-speed variant of Z.ai's GLM 5.3, inheriting its full capabilities while delivering 1.5 to 2 times the output throughput through inference acceleration. Prime is for interactive coding and agent work on GLM's flagship where speed is worth paying for; plain GLM 5.3 gives the same capability at a much lower rate for batch work.
Input tokens cost $4.14 per 1M tokens and output tokens cost $13.00 per 1M tokens through YepAPI. No monthly minimums — you only pay for what you use.
Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.
GLM 5.3 Prime supports a 1M token context window with up to 131K output tokens per request.
Ready to use GLM 5.3 Prime?
$5 free credit on signup. No credit card required. Pay per call.
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