Model comparison
Seed 2.0 Pro vs Solar Pro4
Seed 2.0 Pro is the stronger model overall, scoring 43.2 to 42.1 on the Noometry Index. Solar Pro4 costs 2.1× less per token, which makes it the better buy when Seed 2.0 Pro's lead doesn't matter for your workload.
Last verified . 17 shared benchmarks.
ByteDance Seed
UpstageSummary
- They share 17 benchmarks with published results for both. Seed 2.0 Pro scores higher in 7 categories and Solar Pro4 in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Seed 2.0 Pro leads 62.9 to 56.5.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $0.50 / $3 for Seed 2.0 Pro.
- Solar Pro4 accepts more context: 524K tokens versus 256K.
Side by side
| Seed 2.0 Pro | Solar Pro4 | |
|---|---|---|
| Provider | ByteDance Seed | Upstage |
| Noometry Index | 43.2 | 42.1 |
| Released | 2026-02-14 | 2026-08-06 |
| Weights | Proprietary | Proprietary |
| Context window | 256K | 524K |
| Max output | 128K | 131K |
| Input $ / M tokens | $0.50 | $0.30 |
| Output $ / M tokens | $3 | $1.20 |
| Results tracked | 20 | 18 |
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Category by category
Coding Seed 2.0 Pro leads
Seed 2.0 Pro: 43.5 (#86), Solar Pro4: 40.1 (#149)
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1472 | 1437 |
| LMArena WebDev | — | 1371 |
Reasoning Solar Pro4 leads
Seed 2.0 Pro: 24.1 (#165), Solar Pro4: 28.5 (#104)
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1453 | 1399 |
| NYT Connections (extended) | 28.4% | — |
| Thematic Generalization | 57.1% | — |
Math Too close to call
Seed 2.0 Pro: 39.3 (#108), Solar Pro4: 38.8 (#128)
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Math | 1439 | 1416 |
Knowledge Too close to call
Seed 2.0 Pro: 40.2 (#122), Solar Pro4: 39.8 (#129)
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1440 | 1427 |
Multimodal Not comparable
Seed 2.0 Pro: 41.5 (#35), Solar Pro4: —
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1274 | — |
Multilingual Seed 2.0 Pro leads
Seed 2.0 Pro: 54.5 (#39), Solar Pro4: 48.7 (#139)
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1441 | 1361 |
| LMArena Chinese | 1489 | 1415 |
| LMArena French | 1471 | 1397 |
| LMArena German | 1442 | 1364 |
| LMArena Japanese | 1408 | 1309 |
| LMArena Korean | 1411 | 1382 |
| LMArena Russian | 1449 | 1360 |
| LMArena Spanish | 1460 | 1401 |
Instruction Following Seed 2.0 Pro leads
Seed 2.0 Pro: 74.5 (#91), Solar Pro4: 72.7 (#132)
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1414 | 1377 |
Long Context Seed 2.0 Pro leads
Seed 2.0 Pro: 43.6 (#90), Solar Pro4: 42.1 (#130)
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1428 | 1381 |
Writing & Preference Seed 2.0 Pro leads
Seed 2.0 Pro: 62.9 (#69), Solar Pro4: 56.5 (#138)
| Benchmark | Seed 2.0 Pro | Solar Pro4 |
|---|---|---|
| LMArena Text | 1448 | 1386 |
| LMArena Creative Writing | 1406 | 1316 |
| LMArena Multi-Turn | 1441 | 1385 |
Frequently asked questions
Is Seed 2.0 Pro better than Solar Pro4?
Seed 2.0 Pro is the stronger model overall, scoring 43.2 to 42.1 on the Noometry Index. Solar Pro4 costs 2.1× less per token, which makes it the better buy when Seed 2.0 Pro's lead doesn't matter for your workload.
Which is cheaper, Seed 2.0 Pro or Solar Pro4?
Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Seed 2.0 Pro lists at $0.50 and $3.
Is Seed 2.0 Pro or Solar Pro4 better for coding?
Seed 2.0 Pro scores higher on coding benchmarks: 43.5 versus 40.1 in the Noometry coding category.
Which has the bigger context window?
Solar Pro4 does, with 524K tokens against 256K.
How many benchmarks do Seed 2.0 Pro and Solar Pro4 share?
17 benchmarks have published results for both models. Seed 2.0 Pro has 20 scored results on Noometry and Solar Pro4 has 18.