Is GLM-5.3 the newest GLM here?
Yes. It is the latest Z.ai release in this catalogue, alongside GLM-5.3 Flash.
All modelsZ.ai
GLM-5.3 API: pricing, base URL and quick setup
GLM-5.3 is available on A2Agent as glm-5.3 at $1.40 per 1M input tokens, with a 1M context window, through one OpenAI-compatible endpoint. The current GLM coding model, at a 1M window.
Specifications and pricing
| Model id | glm-5.3 |
|---|---|
| Platform | Z.ai |
| Context window | 1M |
| Tagged for | chat, coding |
| Discount | … |
| Input / 1M tokens | $1.40 |
| Output / 1M tokens | $4.40 |
Prices synced with platform billing (USD per 1M tokens).
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",
"messages": [{"role": "user", "content": "Reply with OK"}]
}'Using it from a coding client
Reach for 5.3 when a coding agent has to read broadly before it writes. If the session is mostly retrieval and summarising, GLM-5.3 Flash covers the same window for about a tenth of the money.
How it compares within its family
GLM-5.3 is the newest Z.ai model in this catalogue. It carries the coding tag, a 1M context, and lists at $1.40 per million input tokens and $4.40 output. Those are the same three facts as GLM-5.2, which means nothing recorded here separates the two except release order. The interesting comparison runs sideways, to GLM-5.3 Flash: same 1M window, same family, but $0.15 and $0.50 at list and tagged for vision rather than coding. So the real question is rarely 5.3 against 5.2. It is whether a task needs the full model at all. Against GLM-5 and GLM-5.1 the difference is window size, 1M against 200K.
Other models on this platform
- GLM-5200K
- GLM-5.1200K
- GLM-5.21M
- GLM-5.3 Flash1M
Questions
How is it different from GLM-5.2?
By the data shown here, it is not: same 1M window, same coding tag, same $1.40 and $4.40 list. GLM-5.3 is simply the later release.
What is the context window?
1M tokens.
When should I use GLM-5.3 Flash instead?
When the work is reading rather than writing. Flash keeps the 1M window and lists at $0.15 and $0.50, about a tenth of this rate.
Trial credit on sign-up, billed per token, no minimum spend.