Model comparison
Seed 2.0 Pro vs Step 3
Seed 2.0 Pro is the stronger model overall, scoring 42.5 to 39.9 on the Noometry Index.
Last verified . 16 shared benchmarks.
ByteDance Seed
StepFunSummary
- They share 16 benchmarks with published results for both. Seed 2.0 Pro scores higher in 8 categories and Step 3 in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Seed 2.0 Pro leads 63.0 to 54.5.
- Step 3 has downloadable open weights; the other is API-only.
Side by side
| Seed 2.0 Pro | Step 3 | |
|---|---|---|
| Provider | ByteDance Seed | StepFun |
| Noometry Index | 42.5 | 39.9 |
| Released | 2026-02-14 | — |
| Weights | Proprietary | Open |
| Context window | 256K | — |
| Max output | 128K | — |
| Input $ / M tokens | $0.50 | — |
| Output $ / M tokens | $3 | — |
| Results tracked | 20 | 17 |
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Category by category
Coding Seed 2.0 Pro leads
Seed 2.0 Pro: 42.9 (#84), Step 3: 39.5 (#144)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Coding | 1472 | 1367 |
Reasoning Step 3 leads
Seed 2.0 Pro: 23.1 (#167), Step 3: 27.6 (#102)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Hard Prompts | 1453 | 1355 |
| Kagi LLM Benchmark | — | 62.3% |
| NYT Connections (extended) | 28.4% | — |
| Thematic Generalization | 57.1% | — |
Math Seed 2.0 Pro leads
Seed 2.0 Pro: 36.5 (#110), Step 3: 34.9 (#148)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Math | 1440 | 1366 |
Knowledge Seed 2.0 Pro leads
Seed 2.0 Pro: 39.6 (#119), Step 3: 36.2 (#161)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Expert | 1440 | 1333 |
Multimodal Seed 2.0 Pro leads
Seed 2.0 Pro: 40.8 (#34), Step 3: 34.9 (#81)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Vision | 1275 | 1176 |
Multilingual Seed 2.0 Pro leads
Seed 2.0 Pro: 54.8 (#37), Step 3: 46.5 (#154)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Non-English | 1442 | 1327 |
| LMArena Chinese | 1490 | 1396 |
| LMArena German | 1443 | 1371 |
| LMArena Korean | 1412 | 1271 |
| LMArena Russian | 1450 | 1331 |
| LMArena Spanish | 1460 | 1372 |
| LMArena French | 1470 | — |
| LMArena Japanese | 1408 | — |
Instruction Following Seed 2.0 Pro leads
Seed 2.0 Pro: 74.7 (#86), Step 3: 70.6 (#159)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Instruction Following | 1414 | 1332 |
Long Context Seed 2.0 Pro leads
Seed 2.0 Pro: 43.6 (#85), Step 3: 40.3 (#152)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Longer Query | 1428 | 1326 |
Writing & Preference Seed 2.0 Pro leads
Seed 2.0 Pro: 63.0 (#66), Step 3: 54.5 (#146)
| Benchmark | Seed 2.0 Pro | Step 3 |
|---|---|---|
| LMArena Text | 1448 | 1351 |
| LMArena Creative Writing | 1406 | 1322 |
| LMArena Multi-Turn | 1441 | 1340 |
Frequently asked questions
Is Seed 2.0 Pro better than Step 3?
Seed 2.0 Pro is the stronger model overall, scoring 42.5 to 39.9 on the Noometry Index.
Is Seed 2.0 Pro or Step 3 better for coding?
Seed 2.0 Pro scores higher on coding benchmarks: 42.9 versus 39.5 in the Noometry coding category.
How many benchmarks do Seed 2.0 Pro and Step 3 share?
16 benchmarks have published results for both models. Seed 2.0 Pro has 20 scored results on Noometry and Step 3 has 17.