Model comparison
GLM-5V-Turbo vs Grok 4.1 Fast
GLM-5V-Turbo is the stronger model overall, scoring 43.8 to 41.4 on the Noometry Index. Grok 4.1 Fast costs 6.9× less per token, which makes it the better buy when GLM-5V-Turbo's lead doesn't matter for your workload.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. GLM-5V-Turbo scores higher in 8 categories and Grok 4.1 Fast in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 29.7.
- Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $1.20 / $4 for GLM-5V-Turbo.
- GLM-5V-Turbo accepts more context: 200K tokens versus 128K.
Side by side
| GLM-5V-Turbo | Grok 4.1 Fast | |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 43.8 | 41.4 |
| Released | 2026-04-01 | 2025-06-27 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 128K |
| Max output | 131K | 30K |
| Input $ / M tokens | $1.20 | $0.20 |
| Output $ / M tokens | $4 | $0.50 |
| Results tracked | 19 | 32 |
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Category by category
Coding GLM-5V-Turbo leads
GLM-5V-Turbo: 42.1 (#111), Grok 4.1 Fast: 34.1 (#245)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena WebDev | 1401 | 1242 |
| LMArena Coding | 1466 | 1411 |
| ALE-Bench | — | 394.93 |
Agentic & Tool Use Not comparable
GLM-5V-Turbo: —, Grok 4.1 Fast: 36.3 (#39)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 69.6% |
| τ²-bench Banking | — | 13.1% |
| LMArena Search | — | 1171 |
| Vending-Bench 2 | — | 1,107 |
Reasoning Grok 4.1 Fast leads
GLM-5V-Turbo: 29.7 (#89), Grok 4.1 Fast: 43.4 (#49)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1407 |
| SimpleBench | — | 56% |
| NYT Connections (extended) | — | 87.4% |
| DTBench | — | 87.7% |
| ForecastBench | — | 61 |
Math GLM-5V-Turbo leads
GLM-5V-Turbo: 39.4 (#106), Grok 4.1 Fast: 31.9 (#221)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena Math | 1441 | 1408 |
| MathArena Final-Answer Competitions | — | 60.9% |
| ProofBench | — | 4% |
Knowledge GLM-5V-Turbo leads
GLM-5V-Turbo: 40.6 (#117), Grok 4.1 Fast: 33.1 (#207)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena Expert | 1452 | 1399 |
| Vectara Hallucination Rate | — | 17.8% |
Multimodal GLM-5V-Turbo leads
GLM-5V-Turbo: 40.9 (#42), Grok 4.1 Fast: 37.0 (#76)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena Vision | 1264 | 1201 |
| LMArena Document | 1416 | — |
Multilingual GLM-5V-Turbo leads
GLM-5V-Turbo: 53.0 (#73), Grok 4.1 Fast: 51.0 (#114)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena Non-English | 1420 | 1391 |
| LMArena Chinese | 1488 | 1441 |
| LMArena French | 1444 | 1415 |
| LMArena German | 1423 | 1404 |
| LMArena Korean | 1396 | 1361 |
| LMArena Russian | 1431 | 1387 |
| LMArena Spanish | 1450 | 1413 |
| LMArena Japanese | — | 1349 |
Instruction Following GLM-5V-Turbo leads
GLM-5V-Turbo: 75.0 (#80), Grok 4.1 Fast: 72.7 (#133)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena Instruction Following | 1423 | 1376 |
Long Context GLM-5V-Turbo leads
GLM-5V-Turbo: 44.0 (#80), Grok 4.1 Fast: 42.4 (#126)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena Longer Query | 1438 | 1390 |
Writing & Preference GLM-5V-Turbo leads
GLM-5V-Turbo: 62.5 (#73), Grok 4.1 Fast: 57.2 (#131)
| Benchmark | GLM-5V-Turbo | Grok 4.1 Fast |
|---|---|---|
| LMArena Text | 1437 | 1408 |
| LMArena Creative Writing | 1416 | 1394 |
| LMArena Multi-Turn | 1432 | 1389 |
| EQ-Bench Creative Writing | — | 1327 |
Frequently asked questions
Is GLM-5V-Turbo better than Grok 4.1 Fast?
GLM-5V-Turbo is the stronger model overall, scoring 43.8 to 41.4 on the Noometry Index. Grok 4.1 Fast costs 6.9× less per token, which makes it the better buy when GLM-5V-Turbo's lead doesn't matter for your workload.
Which is cheaper, GLM-5V-Turbo or Grok 4.1 Fast?
Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; GLM-5V-Turbo lists at $1.20 and $4.
Is GLM-5V-Turbo or Grok 4.1 Fast better for coding?
GLM-5V-Turbo scores higher on coding benchmarks: 42.1 versus 34.1 in the Noometry coding category.
Which has the bigger context window?
GLM-5V-Turbo does, with 200K tokens against 128K.
How many benchmarks do GLM-5V-Turbo and Grok 4.1 Fast share?
18 benchmarks have published results for both models. GLM-5V-Turbo has 19 scored results on Noometry and Grok 4.1 Fast has 32.