Model comparison
DeepSeek V4.1 Flash vs Solar Pro 3
DeepSeek V4.1 Flash has enough public results to be ranked (#40); Solar Pro 3 does not yet, so treat this comparison as directional.
Last verified . 2 shared benchmarks.
DeepSeek
UpstageSummary
- They share 2 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 2 categories and Solar Pro 3 in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where DeepSeek V4.1 Flash leads 46.2 to 21.7.
- The biggest single-benchmark swing is SciCode: 51.9% for DeepSeek V4.1 Flash and 24.7% for Solar Pro 3.
- Both cost about the same: $0.15 input and $0.60 output per million tokens.
- DeepSeek V4.1 Flash accepts more context: 1M tokens versus 131K.
- DeepSeek V4.1 Flash has downloadable open weights; the other is API-only.
Side by side
| DeepSeek V4.1 Flash | Solar Pro 3 | |
|---|---|---|
| Provider | DeepSeek | Upstage |
| Noometry Index | 50.3 | 33.3 |
| Released | 2026-09-09 | 2026-01 |
| Weights | Open | Proprietary |
| Context window | 1M | 131K |
| Max output | 393K | 8K |
| Input $ / M tokens | $0.15 | $0.25 |
| Output $ / M tokens | $0.60 | $0.25 |
| Results tracked | 25 | 2 |
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Category by category
Coding DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 52.8 (#29), Solar Pro 3: 34.2
| Benchmark | DeepSeek V4.1 Flash | Solar Pro 3 |
|---|---|---|
| SciCode | 51.9% | 24.7% |
| LMArena WebDev | 1620 | — |
| LMArena Coding | 1511 | — |
| ALE-Bench | 1,092 | — |
Reasoning DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 46.2 (#39), Solar Pro 3: 21.7
| Benchmark | DeepSeek V4.1 Flash | Solar Pro 3 |
|---|---|---|
| CritPt | 14.3% | 0% |
| NYT Connections (extended) | 89.6% | — |
| LMArena Hard Prompts | 1485 | — |
| DTBench | 89.9% | — |
| LMCA | 47% | — |
| Surface Evolver Bench | 46.3% | — |
| Epoch Capabilities Index | 155.01 | — |
Math Not comparable
DeepSeek V4.1 Flash: 48.4 (#52), Solar Pro 3: —
| Benchmark | DeepSeek V4.1 Flash | Solar Pro 3 |
|---|---|---|
| ProofBench | 54% | — |
| LMArena Math | 1493 | — |
Knowledge Not comparable
DeepSeek V4.1 Flash: 41.6 (#97), Solar Pro 3: —
| Benchmark | DeepSeek V4.1 Flash | Solar Pro 3 |
|---|---|---|
| LMArena Expert | 1505 | — |
Multilingual Not comparable
DeepSeek V4.1 Flash: 55.5 (#29), Solar Pro 3: —
| Benchmark | DeepSeek V4.1 Flash | Solar Pro 3 |
|---|---|---|
| LMArena Non-English | 1452 | — |
| LMArena Chinese | 1506 | — |
| LMArena French | 1448 | — |
| LMArena Russian | 1473 | — |
| LMArena Spanish | 1499 | — |
Instruction Following Not comparable
DeepSeek V4.1 Flash: 77.6 (#24), Solar Pro 3: —
| Benchmark | DeepSeek V4.1 Flash | Solar Pro 3 |
|---|---|---|
| LMArena Instruction Following | 1475 | — |
Long Context Not comparable
DeepSeek V4.1 Flash: 45.2 (#46), Solar Pro 3: —
| Benchmark | DeepSeek V4.1 Flash | Solar Pro 3 |
|---|---|---|
| LMArena Longer Query | 1476 | — |
Writing & Preference Not comparable
DeepSeek V4.1 Flash: 65.8 (#43), Solar Pro 3: —
| Benchmark | DeepSeek V4.1 Flash | Solar Pro 3 |
|---|---|---|
| LMArena Text | 1465 | — |
| LMArena Creative Writing | 1436 | — |
| EQ-Bench Creative Writing | 1540 | — |
| LMArena Multi-Turn | 1460 | — |
Frequently asked questions
Is DeepSeek V4.1 Flash better than Solar Pro 3?
DeepSeek V4.1 Flash has enough public results to be ranked (#40); Solar Pro 3 does not yet, so treat this comparison as directional.
Which is cheaper, DeepSeek V4.1 Flash or Solar Pro 3?
Solar Pro 3 is cheaper. It lists at $0.25 per million input tokens and $0.25 per million output tokens; DeepSeek V4.1 Flash lists at $0.15 and $0.60.
Is DeepSeek V4.1 Flash or Solar Pro 3 better for coding?
DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.8 versus 34.2 in the Noometry coding category.
Which has the bigger context window?
DeepSeek V4.1 Flash does, with 1M tokens against 131K.
How many benchmarks do DeepSeek V4.1 Flash and Solar Pro 3 share?
2 benchmarks have published results for both models. DeepSeek V4.1 Flash has 25 scored results on Noometry and Solar Pro 3 has 2.