GLM-5.3 at a glance.
From Z.ai (Zhipu AI)'s own pages, read Oct 20, 2026, so company-reported. A token is a word or part of a word. Prices can change; check the maker's page before you build on them.
- Made by
- Z.ai (Zhipu AI)Based in China
- Released
- Not stated
- What it is for
- “GLM-5.3 is Z.ai's latest flagship model, delivering comprehensive advancements in complex software engineering”Z.ai developer docs: GLM-5.3 guide, Oct 20, 2026 · in Z.ai (Zhipu AI)'s words
- Reads at once
- 1M tokensIts context window: how much text it can take in one go
- Takes in
- text
- Download
- Yes, open weightsLicense: glm-5.3
- Size
- 753B (Hugging Face safetensors size field) parametersHugging Face model card zai-org/GLM-5.3, Oct 20, 2026
$1.40per million tokens in$4.40per million tokens out
Cached input $0.26; cached-input storage 'Limited-time Free'. Smaller variants: GLM-5.3-FlashX $0.37/$1.25, GLM-5.3-Flash $0.15/$0.50.
Z.ai developer docs: Pricing, Oct 20, 2026 · company-reported
Where it ranks.
Its position on each of the 21 tests the models page uses, by testers other than the maker. Epoch AI's and Vectara's scores are shown under their open licenses; for LMArena, Scale and Vals we give the position and link to their own leaderboard. Each list is a snapshot with its date.
| Test | Rank | Score |
|---|---|---|
| Epoch Capabilities IndexEpoch AI, Oct 20, 2026 | #30 | 155.9range 154.04 to 158.39 |
| Vals IndexVals AI, Oct 19, 2026 | #9 | On Vals AI |
| Test | Rank | Score |
|---|---|---|
| LMArena WebDevLMArena, Oct 19, 2026 | Not in the top 20 | |
| SWE-Bench ProScale AI, Sep 22, 2026 | #9 | On Scale AI |
| Vibe Code BenchVals AI, Oct 18, 2026 | Not in the top 20 | |
| LMArena coding chatsLMArena, Oct 15, 2026 | Not in the top 20 |
| Test | Rank | Score |
|---|---|---|
| LMArena textLMArena, Oct 15, 2026 | Not in the top 20 | |
| LMArena creative writingLMArena, Oct 15, 2026 | Not in the top 20 | |
| MultiChallengeScale AI, Feb 3, 2026 | Not in the top 15 |
| Test | Rank | Score |
|---|---|---|
| LMArena Agent ArenaLMArena, Oct 19, 2026 | Not in the top 20 | |
| Remote Labor IndexScale AI | Not in the top 16 | |
| Terminal-Bench 4.0Vals AI, Oct 19, 2026 | #12 | On Vals AI |
| CUA-bench (games)Vals AI, Oct 13, 2026 | Not in the top 9 |
| Test | Rank | Score |
|---|---|---|
| LMArena mathLMArena, Oct 15, 2026 | Not in the top 20 | |
| Humanity's Last ExamScale AI | #15 | On Scale AI |
| ProofBenchVals AI, Oct 12, 2026 | Not in the top 20 |
| Test | Rank | Score |
|---|---|---|
| LMArena visionLMArena, Oct 19, 2026 | Not in the top 20 | |
| LMArena documentsLMArena, Sep 13, 2026 | Not in the top 20 |
| Test | Rank | Score |
|---|---|---|
| GPQA DiamondVals AI, Sep 1, 2026 | Not in the top 20 | |
| MMMU ProVals AI, Sep 1, 2026 | Not in the top 20 |
| Test | Rank | Score |
|---|---|---|
| Vectara hallucination testVectara, Oct 16, 2026 | Not in our copy of the list |
“Not in the top” means it isn't among the models in our copy of that list, which runs to the position shown; it may not have been tested. Vectara's test ranks by how rarely a model adds facts, so lower is better. Positions can be shared when scores tie. Epoch's range is its margin of uncertainty. Epoch AI and Vectara data: CC BY 4.0 and Apache-2.0.
Our note: Guide: '1M-token context window', max output 128K, text-only input; reasoning always on. Release date not stated on pages read; Hugging Face repo created 2026-08-25. Parameter count is Hugging Face's automatic size field, not a maker statement; active parameters not stated. Quote is the opening of a longer sentence.