Model comparison
Gemini 4 Argon vs Step 3.5 Flash
Gemini 4 Argon is the stronger model overall, scoring 56.5 to 42.3 on the Noometry Index.
Last verified . 13 shared benchmarks.
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StepFunSummary
- They share 13 benchmarks with published results for both. Gemini 4 Argon scores higher in 8 categories and Step 3.5 Flash in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 4 Argon leads 73.9 to 42.6.
- Step 3.5 Flash has downloadable open weights; the other is API-only.
Side by side
| Gemini 4 Argon | Step 3.5 Flash | |
|---|---|---|
| Provider | StepFun | |
| Noometry Index | 56.5 | 42.3 |
| Released | 2026-09-30 | 2026-01-29 |
| Weights | Proprietary | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.30 |
| Results tracked | 21 | 19 |
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Category by category
Coding Gemini 4 Argon leads
Gemini 4 Argon: 62.0 (#9), Step 3.5 Flash: 42.4 (#105)
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1550 | 1436 |
| LMArena WebDev | 1678 | — |
| FrontierSWE | 55% | — |
| SciCode | 61.8% | — |
Agentic & Tool Use Not comparable
Gemini 4 Argon: 49.2 (#8), Step 3.5 Flash: —
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| APEX-Agents | 82.2% | — |
| Vending-Bench 2 | 13,718 | — |
Reasoning Gemini 4 Argon leads
Gemini 4 Argon: 44.2 (#47), Step 3.5 Flash: 22.2 (#202)
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1548 | 1411 |
| NYT Connections (extended) | — | 28.4% |
| CritPt | 27.1% | — |
Math Gemini 4 Argon leads
Gemini 4 Argon: 73.9 (#17), Step 3.5 Flash: 42.6 (#84)
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1536 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
| ProofBench | 99% | — |
Knowledge Gemini 4 Argon leads
Gemini 4 Argon: 43.9 (#89), Step 3.5 Flash: 39.6 (#132)
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1553 | 1421 |
Multimodal Not comparable
Gemini 4 Argon: 46.5 (#14), Step 3.5 Flash: —
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| Blueprint-Bench 2 | 54.4% | — |
Multilingual Gemini 4 Argon leads
Gemini 4 Argon: 60.3 (#1), Step 3.5 Flash: 50.5 (#119)
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1523 | 1385 |
| LMArena Chinese | 1610 | 1447 |
| LMArena Russian | 1537 | 1385 |
| LMArena Spanish | 1497 | 1419 |
| LMArena French | — | 1421 |
| LMArena German | — | 1405 |
| LMArena Japanese | — | 1354 |
| LMArena Korean | — | 1352 |
Instruction Following Gemini 4 Argon leads
Gemini 4 Argon: 80.1 (#2), Step 3.5 Flash: 73.1 (#124)
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1538 | 1385 |
Long Context Gemini 4 Argon leads
Gemini 4 Argon: 47.6 (#15), Step 3.5 Flash: 42.8 (#117)
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1549 | 1402 |
Writing & Preference Gemini 4 Argon leads
Gemini 4 Argon: 71.4 (#19), Step 3.5 Flash: 58.8 (#113)
| Benchmark | Gemini 4 Argon | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1534 | 1403 |
| LMArena Creative Writing | 1531 | 1357 |
| LMArena Multi-Turn | 1557 | 1405 |
Frequently asked questions
Is Gemini 4 Argon better than Step 3.5 Flash?
Gemini 4 Argon is the stronger model overall, scoring 56.5 to 42.3 on the Noometry Index.
Is Gemini 4 Argon or Step 3.5 Flash better for coding?
Gemini 4 Argon scores higher on coding benchmarks: 62.0 versus 42.4 in the Noometry coding category.
How many benchmarks do Gemini 4 Argon and Step 3.5 Flash share?
13 benchmarks have published results for both models. Gemini 4 Argon has 21 scored results on Noometry and Step 3.5 Flash has 19.