Model comparison
GLM-4.5V vs Step 3.5 Flash
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 39.8 on the Noometry Index.
Last verified . 13 shared benchmarks.
StepFunSummary
- They share 13 benchmarks with published results for both. GLM-4.5V scores higher in 1 category and Step 3.5 Flash in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Step 3.5 Flash leads 58.8 to 52.5.
- Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.60 / $1.80 for GLM-4.5V.
- Step 3.5 Flash accepts more context: 256K tokens versus 64K.
Side by side
| GLM-4.5V | Step 3.5 Flash | |
|---|---|---|
| Provider | Z.ai (Zhipu) | StepFun |
| Noometry Index | 39.8 | 42.3 |
| Released | 2025-08-11 | 2026-01-29 |
| Weights | Open | Open |
| Context window | 64K | 256K |
| Max output | 16K | 256K |
| Input $ / M tokens | $0.60 | $0.10 |
| Output $ / M tokens | $1.80 | $0.30 |
| Results tracked | 15 | 19 |
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Category by category
Coding Step 3.5 Flash leads
GLM-4.5V: 39.5 (#155), Step 3.5 Flash: 42.4 (#105)
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1347 | 1436 |
Reasoning GLM-4.5V leads
GLM-4.5V: 27.4 (#119), Step 3.5 Flash: 22.2 (#202)
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1334 | 1411 |
| Kagi LLM Benchmark | 59.8% | — |
| NYT Connections (extended) | — | 28.4% |
Math Step 3.5 Flash leads
GLM-4.5V: 37.4 (#159), Step 3.5 Flash: 42.6 (#84)
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1354 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
Knowledge Step 3.5 Flash leads
GLM-4.5V: 37.5 (#156), Step 3.5 Flash: 39.6 (#132)
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1353 | 1421 |
Multimodal Not comparable
GLM-4.5V: 34.3 (#92), Step 3.5 Flash: —
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Vision | 1154 | — |
Multilingual Step 3.5 Flash leads
GLM-4.5V: 44.6 (#177), Step 3.5 Flash: 50.5 (#119)
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1303 | 1385 |
| LMArena Chinese | 1337 | 1447 |
| LMArena Russian | 1298 | 1385 |
| LMArena Spanish | 1336 | 1419 |
| LMArena French | — | 1421 |
| LMArena German | — | 1405 |
| LMArena Japanese | — | 1354 |
| LMArena Korean | — | 1352 |
Instruction Following Step 3.5 Flash leads
GLM-4.5V: 69.2 (#175), Step 3.5 Flash: 73.1 (#124)
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1311 | 1385 |
Long Context Step 3.5 Flash leads
GLM-4.5V: 39.6 (#171), Step 3.5 Flash: 42.8 (#117)
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1304 | 1402 |
Writing & Preference Step 3.5 Flash leads
GLM-4.5V: 52.5 (#170), Step 3.5 Flash: 58.8 (#113)
| Benchmark | GLM-4.5V | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1333 | 1403 |
| LMArena Creative Writing | 1295 | 1357 |
| LMArena Multi-Turn | 1332 | 1405 |
Frequently asked questions
Is GLM-4.5V better than Step 3.5 Flash?
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 39.8 on the Noometry Index.
Which is cheaper, GLM-4.5V or Step 3.5 Flash?
Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; GLM-4.5V lists at $0.60 and $1.80.
Is GLM-4.5V or Step 3.5 Flash better for coding?
Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 39.5 in the Noometry coding category.
Which has the bigger context window?
Step 3.5 Flash does, with 256K tokens against 64K.
How many benchmarks do GLM-4.5V and Step 3.5 Flash share?
13 benchmarks have published results for both models. GLM-4.5V has 15 scored results on Noometry and Step 3.5 Flash has 19.