Model comparison
GLM-4.5 vs Grok 4.20 Multi-Agent
Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 41.4 on the Noometry Index. GLM-4.5 costs 1.6× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. GLM-4.5 scores higher in 0 categories and Grok 4.20 Multi-Agent in 8 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 42.4 to 27.7.
- GLM-4.5 is cheaper at $0.60 / $2.20 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
- Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 131K.
- GLM-4.5 has downloadable open weights; the other is API-only.
Side by side
| GLM-4.5 | Grok 4.20 Multi-Agent | |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 41.4 | 45.5 |
| Released | 2025-07-27 | 2026-03-09 |
| Weights | Open | Proprietary |
| Context window | 131K | 1M |
| Max output | 98K | 30K |
| Input $ / M tokens | $0.60 | $1.25 |
| Output $ / M tokens | $2.20 | $2.50 |
| Results tracked | 27 | 20 |
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Category by category
Coding Grok 4.20 Multi-Agent leads
GLM-4.5: 41.1 (#121), Grok 4.20 Multi-Agent: 42.4 (#91)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Coding | 1434 | 1458 |
| SWE-bench Verified (bash only) | 54.2% | — |
| WeirdML | 40.6% | — |
| ALE-Bench | 344.82 | — |
| AlgoTune | 1.52 | — |
Agentic & Tool Use Not comparable
GLM-4.5: —, Grok 4.20 Multi-Agent: —
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Search | — | 1204 |
Reasoning Grok 4.20 Multi-Agent leads
GLM-4.5: 27.7 (#99), Grok 4.20 Multi-Agent: 42.4 (#44)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Hard Prompts | 1430 | 1448 |
| Kagi LLM Benchmark | 57.9% | — |
| NYT Connections (extended) | — | 89.6% |
Math Too close to call
GLM-4.5: 36.3 (#119), Grok 4.20 Multi-Agent: 36.6 (#106)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Math | 1427 | 1441 |
Knowledge Grok 4.20 Multi-Agent leads
GLM-4.5: 35.5 (#172), Grok 4.20 Multi-Agent: 39.7 (#116)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Expert | 1433 | 1445 |
| Humanity's Last Exam | 8.3% | — |
| Confabulations | 11.3% | — |
Multimodal Not comparable
GLM-4.5: —, Grok 4.20 Multi-Agent: 39.8 (#44)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Vision | — | 1259 |
Multilingual Grok 4.20 Multi-Agent leads
GLM-4.5: 53.0 (#74), Grok 4.20 Multi-Agent: 54.6 (#40)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Non-English | 1417 | 1440 |
| LMArena Chinese | 1465 | 1475 |
| LMArena French | 1423 | 1467 |
| LMArena German | 1406 | 1456 |
| LMArena Japanese | 1416 | 1405 |
| LMArena Korean | 1382 | 1416 |
| LMArena Russian | 1414 | 1457 |
| LMArena Spanish | 1454 | 1447 |
Instruction Following Too close to call
GLM-4.5: 74.3 (#100), Grok 4.20 Multi-Agent: 75.0 (#80)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Instruction Following | 1405 | 1420 |
Long Context Grok 4.20 Multi-Agent leads
GLM-4.5: 38.2 (#196), Grok 4.20 Multi-Agent: 43.7 (#84)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Longer Query | 1413 | 1430 |
| Fiction.LiveBench | 58.3% | — |
Writing & Preference Grok 4.20 Multi-Agent leads
GLM-4.5: 57.7 (#121), Grok 4.20 Multi-Agent: 64.1 (#57)
| Benchmark | GLM-4.5 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Text | 1430 | 1450 |
| LMArena Creative Writing | 1395 | 1435 |
| LMArena Multi-Turn | 1415 | 1451 |
| Short-Story Creative Writing | 73.4% | — |
| EQ-Bench Creative Writing | 1343 | — |
Frequently asked questions
Is GLM-4.5 better than Grok 4.20 Multi-Agent?
Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 41.4 on the Noometry Index. GLM-4.5 costs 1.6× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.
Which is cheaper, GLM-4.5 or Grok 4.20 Multi-Agent?
GLM-4.5 is cheaper. It lists at $0.60 per million input tokens and $2.20 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.
Is GLM-4.5 or Grok 4.20 Multi-Agent better for coding?
Grok 4.20 Multi-Agent scores higher on coding benchmarks: 42.4 versus 41.1 in the Noometry coding category.
Which has the bigger context window?
Grok 4.20 Multi-Agent does, with 1M tokens against 131K.
How many benchmarks do GLM-4.5 and Grok 4.20 Multi-Agent share?
17 benchmarks have published results for both models. GLM-4.5 has 27 scored results on Noometry and Grok 4.20 Multi-Agent has 20.