GLM 5.3 Prime
Z.ai · released Sep 23, 2026
- Type
- Closed
- Input
- None held
- Output
- None held
- Cached
- None held
We don't hold a list price for this model yet · hosted only — we have no record of published weights
Our take
Written Sep 26, 2026GLM 5.3 Prime is a hosted-only text model: we list no download for it, so using it means choosing a host. Nothing in our data measures how well it answers, so treat it as a candidate to trial on work you can check yourself.
Reach for it when long documents need to go into a single request without being split up first, and you are happy to work through a host rather than run the model yourself. Both hosts list the same rate, so the choice between them is not a price decision. Skip it if you need measured evidence of coding, reasoning or chat quality before committing, or if you need to run the model on your own hardware.
The case for it
- Long documents go in whole rather than being split up first, though whether the model reliably uses material from the far end of a long input is unverified in our data.
- OpenRouter and Alibaba list the same rate for both input and output, so picking between them is not a price decision.
The case against it
- No benchmark scores are supplied, so chat, coding and reasoning ability all need a trial on work you can judge yourself.
- Neither host carries a measured speed, so there is no evidence on which to prefer one over the other beyond the identical rates.
- The parameter count is not disclosed, so there is no basis for judging what running it would demand.
How good is it?
We hold no score for this model.
So there is no figure here for everyday use, coding, agent work or writing. That is a gap in our data, not a low score.
Where to rent it
Prices checked between 55 min and 58 min ago — each listing carries its own date.
- per 1M tokens
- $2.80 in / $8.80 out
- Context served
- 1M
- Throughput
- ~55 tok/s
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouterOpenRouter's own listing | $2.80 / $8.80checked 58 min ago | 1M | not measured | Unknown | Unknown | Unknown |
| Alibaba CloudThrough OpenRouter | $2.80 / $8.80checked 55 min ago | 1M131K max reply | 55 tok/s | No | Yesunknown period | Unknown |
OpenRouterAcross the 2 listings we hold: 1 says it does not train on prompts, 0 say they do and 1 does not say. 0 appear in the zero-retention registry we check; the rest are unknown to us.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenRouterOpenRouter's own listing | ✓ | ✓ | ✗ |
| Alibaba CloudThrough OpenRouter | ✓ | ✓ | ✗ |
Tool calling: 2 of 2 listings say yes. JSON output: 2 of 2 listings say yes. Strict schema: 0 of 2 listings say yes, 2 say no.
When we formed this view
Recent changes
What moved
first indexed by our pipelineEach date is the day we first saw the change, or the day the maker announced it.
What we do not know about this model yet
- No independent board has scored it, so we hold no quality figures at all.
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 2 listings does not say whether it trains on prompts.
- We don't hold a list price for this model yet — the gap is ours, not the lab's.
- We hold no batch or off-peak rate for any of its listings.
Licence and identifiers
What the licence allowsWe hold no licence record for this model. Inside are the identifiers you need to pull it — its Hugging Face repo where we have one, our slug and a machine-readable card.
Licence
We hold no licence record for this model, and no record of published weights either — so we can neither summarise its terms nor point you at the weights.
Identifiers
- Takes in, gives back
- Text in, text out
- Catalogue slug
- z-ai-glm-5-3-prime