Model comparison
GLM-4.5-Air vs Grok 4.3
Grok 4.3 is the stronger model overall, scoring 43.6 to 38.7 on the Noometry Index. GLM-4.5-Air costs 3.7× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. GLM-4.5-Air scores higher in 0 categories and Grok 4.3 in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 34.6.
- GLM-4.5-Air is cheaper at $0.20 / $1.10 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Grok 4.3 accepts more context: 1M tokens versus 131K.
- GLM-4.5-Air has downloadable open weights; the other is API-only.
Side by side
| GLM-4.5-Air | Grok 4.3 | |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 38.7 | 43.6 |
| Released | 2025-07-20 | 2026-04-17 |
| Weights | Open | Proprietary |
| Context window | 131K | 1M |
| Max output | 98K | 30K |
| Input $ / M tokens | $0.20 | $1.25 |
| Output $ / M tokens | $1.10 | $2.50 |
| Results tracked | 27 | 40 |
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Category by category
Coding Grok 4.3 leads
GLM-4.5-Air: 34.5 (#225), Grok 4.3: 41.3 (#117)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Coding | 1397 | 1415 |
| LMArena WebDev | — | 1357 |
| SciCode | — | 47.3% |
| GSO | 2.9% | — |
| WeirdML | — | 49.9% |
| ALE-Bench | — | 944.17 |
Agentic & Tool Use Not comparable
GLM-4.5-Air: —, Grok 4.3: 27.6 (#93)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |
| Vending-Bench 2 | — | 35.26 |
Reasoning Grok 4.3 leads
GLM-4.5-Air: 23.3 (#166), Grok 4.3: 34.9 (#60)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Hard Prompts | 1379 | 1397 |
| ForecastBench | 59.2 | 60.3 |
| Kagi LLM Benchmark | 43% | — |
| NYT Connections (extended) | — | 55.2% |
| CritPt | — | 8% |
| Chess Puzzles | — | 25% |
| DTBench | — | 90.7% |
| LMCA | — | 38.3% |
| Epoch Capabilities Index | — | 149.13 |
Math Grok 4.3 leads
GLM-4.5-Air: 33.8 (#166), Grok 4.3: 45.8 (#60)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Math | 1396 | 1388 |
| FrontierMath (Tiers 1-3) | — | 42.8% |
| FrontierMath Tier 4 | — | 14.6% |
| OTIS Mock AIME 2024-2025 | — | 93.3% |
| ProofBench | — | 11% |
| Omni-MATH | 39.1% | — |
Knowledge Grok 4.3 leads
GLM-4.5-Air: 34.6 (#184), Grok 4.3: 52.5 (#57)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Expert | 1370 | 1385 |
| GPQA Diamond | — | 88.8% |
| Humanity's Last Exam | 8.1% | — |
| SimpleQA Verified | — | 33.2% |
| MMLU-Pro | 76.2% | — |
| Vectara Hallucination Rate | 9.3% | — |
| GPQA (HELM) | 59.4% | — |
Multimodal Not comparable
GLM-4.5-Air: —, Grok 4.3: 31.6 (#96)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Vision | — | 1231 |
| Blueprint-Bench 2 | — | 0% |
Multilingual Grok 4.3 leads
GLM-4.5-Air: 49.4 (#130), Grok 4.3: 50.7 (#114)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1366 | 1385 |
| LMArena Chinese | 1427 | 1423 |
| LMArena French | 1399 | 1412 |
| LMArena German | 1376 | 1395 |
| LMArena Japanese | 1348 | 1379 |
| LMArena Korean | 1306 | 1357 |
| LMArena Russian | 1373 | 1399 |
| LMArena Spanish | 1385 | 1402 |
Instruction Following Grok 4.3 leads
GLM-4.5-Air: 69.8 (#165), Grok 4.3: 72.3 (#135)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1353 | 1366 |
| IFEval | 81.2% | — |
Long Context Too close to call
GLM-4.5-Air: 41.6 (#130), Grok 4.3: 42.5 (#118)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1367 | 1393 |
Writing & Preference Grok 4.3 leads
GLM-4.5-Air: 56.1 (#134), Grok 4.3: 58.6 (#112)
| Benchmark | GLM-4.5-Air | Grok 4.3 |
|---|---|---|
| LMArena Text | 1384 | 1397 |
| LMArena Creative Writing | 1343 | 1380 |
| LMArena Multi-Turn | 1371 | 1406 |
| WildBench | 78.9% | — |
| EQ-Bench 4 | — | 1075 |
Frequently asked questions
Is GLM-4.5-Air better than Grok 4.3?
Grok 4.3 is the stronger model overall, scoring 43.6 to 38.7 on the Noometry Index. GLM-4.5-Air costs 3.7× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.
Which is cheaper, GLM-4.5-Air or Grok 4.3?
GLM-4.5-Air is cheaper. It lists at $0.20 per million input tokens and $1.10 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.
Is GLM-4.5-Air or Grok 4.3 better for coding?
Grok 4.3 scores higher on coding benchmarks: 41.3 versus 34.5 in the Noometry coding category.
Which has the bigger context window?
Grok 4.3 does, with 1M tokens against 131K.
How many benchmarks do GLM-4.5-Air and Grok 4.3 share?
18 benchmarks have published results for both models. GLM-4.5-Air has 27 scored results on Noometry and Grok 4.3 has 40.