Model comparison
GLM-4.5V vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 47.9 to 39.8 on the Noometry Index. GLM-4.5V costs 1.6× less per token, which makes it the better buy when Step 5 Preview's lead doesn't matter for your workload.
Last verified . 14 shared benchmarks.
StepFunSummary
- They share 14 benchmarks with published results for both. GLM-4.5V scores higher in 0 categories and Step 5 Preview in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 5 Preview leads 40.0 to 27.4.
- GLM-4.5V is cheaper at $0.60 / $1.80 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
- Step 5 Preview accepts more context: 1.02M tokens versus 64K.
- GLM-4.5V has downloadable open weights; the other is API-only.
Side by side
| GLM-4.5V | Step 5 Preview | |
|---|---|---|
| Provider | Z.ai (Zhipu) | StepFun |
| Noometry Index | 39.8 | 47.9 |
| Released | 2025-08-11 | 2026-09-16 |
| Weights | Open | Proprietary |
| Context window | 64K | 1.02M |
| Max output | 16K | 66K |
| Input $ / M tokens | $0.60 | $1 |
| Output $ / M tokens | $1.80 | $2.70 |
| Results tracked | 15 | 18 |
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Category by category
Coding Step 5 Preview leads
GLM-4.5V: 39.5 (#155), Step 5 Preview: 51.8 (#36)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Coding | 1347 | 1480 |
| LMArena WebDev | — | 1564 |
| SciCode | — | 58.9% |
Reasoning Step 5 Preview leads
GLM-4.5V: 27.4 (#119), Step 5 Preview: 40.0 (#57)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Hard Prompts | 1334 | 1465 |
| Kagi LLM Benchmark | 59.8% | — |
| CritPt | — | 20.9% |
Math Step 5 Preview leads
GLM-4.5V: 37.4 (#159), Step 5 Preview: 46.1 (#72)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Math | 1354 | 1470 |
| ProofBench | — | 42% |
Knowledge Step 5 Preview leads
GLM-4.5V: 37.5 (#156), Step 5 Preview: 41.2 (#112)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1353 | 1470 |
Multimodal Step 5 Preview leads
GLM-4.5V: 34.3 (#92), Step 5 Preview: 41.0 (#41)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Vision | 1154 | 1267 |
Multilingual Step 5 Preview leads
GLM-4.5V: 44.6 (#177), Step 5 Preview: 53.8 (#54)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1303 | 1432 |
| LMArena Chinese | 1337 | 1519 |
| LMArena Russian | 1298 | 1436 |
| LMArena Spanish | 1336 | 1439 |
Instruction Following Step 5 Preview leads
GLM-4.5V: 69.2 (#175), Step 5 Preview: 76.0 (#50)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1311 | 1444 |
Long Context Step 5 Preview leads
GLM-4.5V: 39.6 (#171), Step 5 Preview: 44.5 (#64)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1304 | 1455 |
Writing & Preference Step 5 Preview leads
GLM-4.5V: 52.5 (#170), Step 5 Preview: 62.8 (#71)
| Benchmark | GLM-4.5V | Step 5 Preview |
|---|---|---|
| LMArena Text | 1333 | 1442 |
| LMArena Creative Writing | 1295 | 1410 |
| LMArena Multi-Turn | 1332 | 1447 |
Frequently asked questions
Is GLM-4.5V better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 47.9 to 39.8 on the Noometry Index. GLM-4.5V costs 1.6× less per token, which makes it the better buy when Step 5 Preview's lead doesn't matter for your workload.
Which is cheaper, GLM-4.5V or Step 5 Preview?
GLM-4.5V is cheaper. It lists at $0.60 per million input tokens and $1.80 per million output tokens; Step 5 Preview lists at $1 and $2.70.
Is GLM-4.5V or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 51.8 versus 39.5 in the Noometry coding category.
Which has the bigger context window?
Step 5 Preview does, with 1.02M tokens against 64K.
How many benchmarks do GLM-4.5V and Step 5 Preview share?
14 benchmarks have published results for both models. GLM-4.5V has 15 scored results on Noometry and Step 5 Preview has 18.