GLM-5.3 Flash API: pricing, base URL and quick setup
Use GLM-5.3 Flash on A2Agent with model ID glm-5.3-flash. The catalog lists a 1M context window. Check token rates below and verify the features your app needs.
Specifications and pricing
| Model ID | glm-5.3-flash |
|---|---|
| Platform | Z.ai |
| Context window | 1M |
| Tagged for | chat, vision |
| Discount | — |
| Input / 1M tokens | $0.150 |
| Output / 1M tokens | $0.500 |
USD per 1M tokens. Final billing depends on your API key group and metered usage.
Cheapest way to use GLM-5.3 Flash
Prices on this page come from the live catalog. Compare the official price with the A2Agent price in the table above, then multiply by your monthly token volume.
Quick setup
curl https://a2agent.me/v1/chat/completions \
-H "content-type: application/json" \
-H "authorization: Bearer sk-your-a2agent-key" \
-d '{
"model": "glm-5.3-flash",
"messages": [{"role": "user", "content": "Reply with OK"}]
}'Using it from a coding client
If your client supports model profiles, compare Flash and GLM-5.3 on the same documents or screenshots. Check the results before assigning each model a role.
How it compares within its family
These comparisons use catalog context limits, tags and reference rates, not independent quality benchmarks. Rates can change. Check current pricing above and test your workload; a higher price or a larger context window does not establish better results.
GLM-5.3 Flash is the low-cost member of the GLM line: $0.15 per million input tokens and $0.50 output, against $1.40 and $4.40 for GLM-5.3 proper. It keeps the full 1M window, so the saving does not reduce the listed context limit. It is also the only Z.ai model here tagged for vision. For document or screenshot tasks, compare its results with the other models you use. The GLM models tagged for coding are 5.1, 5.2 and 5.3. These tags describe the catalog categories; they do not measure accuracy on your workload. Flash has the lowest input and output rates in this Z.ai catalog. Check how much correction its results need when comparing total task cost.
Other models on this platform
Questions
Does it read images?
Yes. It is the only Z.ai model in this catalog carrying the vision tag, alongside chat.
What is the context window?
1M tokens, the same as GLM-5.3.
Is it the cheapest GLM here?
Yes, at list, on both input and output. The next cheapest is GLM-5 at $1.00 and $3.20.
Can I use it for coding?
It is not tagged for coding. GLM-5.1, GLM-5.2 and GLM-5.3 are, and they are the ones to try when Flash output needs too much correcting.
Billed per token. Top up from $1, no top-up fee.