GLM-5.3 Flash: LiveBench scores and how to run it with BrainOutput
GLM-5.3 Flash is a model from Z.AI. In the LiveBench release of 2026-06-25 (fetched 2026-10-03) it ranks #52 of 66, with a global score of 71.59.
What is GLM-5.3 Flash?
GLM-5.3 Flash is listed on LiveBench, a public, continuously refreshed benchmark that scores models on seven categories: reasoning, coding, agentic coding, mathematics, data analysis, language and instruction following. Its strongest category in this snapshot: agentic coding (#24 of 66).
Its weights are published: it can run on hardware you control, with no per-token meter and no vendor who can change the model underneath you.
The model at a glance
| Vendor | Z.AI |
|---|---|
| Weights | Open-weight (weights published) |
| Licence | MIT |
| Release date (per LiveBench) | — |
| LiveBench identifier | glm-5.3-flash |
LiveBench scores, dated
Score and rank out of 66 models, per category, in the LiveBench release of 2026-06-25 fetched 2026-10-03.
LiveBench, release 2026-06-25 · livebench.ai · 66 models · fetched 2026-10-03
Overall rank in this LiveBench snapshot.
Global score: the mean of the seven categories.
Gap to #1, Claude Fable 5.1 Max Effort (83.41).
| Category | Score | Rank |
|---|---|---|
| Reasoning | 77.64 | #56 / 66 |
| Coding | 78.95 | #28 / 66 |
| Agentic coding | 56.77 | #24 / 66 |
| Mathematics | 81.24 | #58 / 66 |
| Data analysis | 76.40 | #33 / 66 |
| Language | 77.31 | #43 / 66 |
| Instruction following | 52.82 | #66 / 66 |
| Global (mean of the 7 categories) | 71.59 | #52 / 66 |
Method note: the global score is the mean of the seven category averages, computed by us from LiveBench's published file; it may differ by a few decimals from the site's own display. Equal scores keep LiveBench's file order. Benchmarks measure benchmark tasks — during an AI diagnostic we re-run the comparison on your own workloads.
Running GLM-5.3 Flash with BrainOutput
BrainOutput routes each task to a model by confidentiality: sensitive work stays on a local or private model, and everything else goes to a cloud model only when your policy allows it.
Locally, on your hardware
Available
The weights run on a machine on your premises. The right hardware depends on model size and concurrent users: we size it during the AI diagnostic.
In a private cloud
Available
The same model, served from dedicated private inference, under the same routing policy as on-premises.
With your own key (BYOK)
Available
If a hosted service you already pay for offers this model, plug in your key: BrainOutput sends it only non-sensitive work, and only when your policy allows it.
Frequently asked questions
Is GLM-5.3 Flash an open-weight model?
Yes: its weights are published. You can run it on your own hardware or in a private cloud; licence terms vary by model and we check them before any deployment.
Can we use GLM-5.3 Flash with BrainOutput?
Yes: locally on your hardware, in a private cloud, or through your own API key (BYOK). Hardware sizing is done during the AI diagnostic, for your workload — we do not publish figures we have not measured.
Where do these scores come from?
From LiveBench (livebench.ai), release 2026-06-25, file fetched 2026-10-03. The global score is the mean of the seven categories, computed by us. The ranking changes monthly; we re-verify at diagnostic time.
Find out whether GLM-5.3 Flash fits your work
An AI diagnostic maps your processes, classes what is sensitive, and benchmarks current models against your real tasks — dated numbers, yours this time.
Sources
- LiveBench — leaderboard, release 2026-06-25 — accessed 2026-10-03
- GLM-5.3 Flash — vendor and licence — accessed 2026-10-04