Model comparison
Claude Sonnet 4.6 vs Solar Pro 3
Claude Sonnet 4.6 has enough public results to be ranked (#50); Solar Pro 3 does not yet, so treat this comparison as directional.
Last verified . 2 shared benchmarks.
UpstageSummary
- They share 2 benchmarks with published results for both. Claude Sonnet 4.6 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 Claude Sonnet 4.6 leads 46.1 to 22.4.
- The biggest single-benchmark swing is SciCode: 46.8% for Claude Sonnet 4.6 and 24.7% for Solar Pro 3.
- Solar Pro 3 is cheaper at $0.25 / $0.25 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.6.
- Claude Sonnet 4.6 accepts more context: 1M tokens versus 131K.
Side by side
| Claude Sonnet 4.6 | Solar Pro 3 | |
|---|---|---|
| Provider | Anthropic | Upstage |
| Noometry Index | 50.3 | 33.9 |
| Released | 2026-02-17 | 2026-01 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 131K |
| Max output | 128K | 8K |
| Input $ / M tokens | $3 | $0.25 |
| Output $ / M tokens | $15 | $0.25 |
| Results tracked | 57 | 2 |
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Category by category
Coding Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 46.3 (#67), Solar Pro 3: 34.8
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| SciCode | 46.8% | 24.7% |
| SWE-bench Verified | 75.2% | — |
| DeepSWE | 29.9% | — |
| FrontierCode | 24.3% | — |
| LMArena WebDev | 1522 | — |
| WeirdML | 66.1% | — |
| LMArena Coding | 1504 | — |
| ALE-Bench | 1,327 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 4.6: 39.1 (#28), Solar Pro 3: —
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| Terminal-Bench | 53.4% | — |
| APEX-Agents | 43% | — |
| OSWorld 2.0 | 9.3% | — |
| DeepResearch Bench | 54.9% | — |
| OSWorld | 72.1% | — |
| ExploitBench | 23.6% | — |
| GBAEval | 48.8% | — |
| GDP.pdf | 18% | — |
| LMArena Search | 1221 | — |
| Vending-Bench 2 | 7,204 | — |
Reasoning Claude Sonnet 4.6 leads
Claude Sonnet 4.6: 46.1 (#45), Solar Pro 3: 22.4
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| CritPt | 3.1% | 0% |
| ARC-AGI-2 | 60.4% | — |
| NYT Connections (extended) | 80.9% | — |
| ARC-AGI-1 | 86.5% | — |
| Chess Puzzles | 13% | — |
| Thematic Generalization | 76.3% | — |
| LMArena Hard Prompts | 1484 | — |
| Mystery Game Puzzles | 16% | — |
| DTBench | 89.9% | — |
| LMCA | 46.5% | — |
| Epoch Capabilities Index | 152.24 | — |
| ForecastBench | 62 | — |
Math Not comparable
Claude Sonnet 4.6: 52.9 (#49), Solar Pro 3: —
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 85.8% | — |
| ProofBench | 45% | — |
| LMArena Math | 1462 | — |
| FrontierMath (Feb 2025 set) | 32.4% | — |
| FrontierMath Tier 4 (v1) | 8.3% | — |
Knowledge Not comparable
Claude Sonnet 4.6: 51.7 (#65), Solar Pro 3: —
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| GPQA Diamond | 87.4% | — |
| SimpleQA Verified | 35.5% | — |
| Vectara Hallucination Rate | 10.6% | — |
| LMArena Expert | 1500 | — |
Multimodal Not comparable
Claude Sonnet 4.6: 38.0 (#68), Solar Pro 3: —
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| LMArena Vision | 1283 | — |
| Blueprint-Bench 2 | 6.7% | — |
| LMArena Document | 1482 | — |
Multilingual Not comparable
Claude Sonnet 4.6: 54.4 (#41), Solar Pro 3: —
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| LMArena Non-English | 1440 | — |
| LMArena Chinese | 1491 | — |
| LMArena French | 1465 | — |
| LMArena German | 1428 | — |
| LMArena Japanese | 1420 | — |
| LMArena Korean | 1411 | — |
| LMArena Russian | 1440 | — |
| LMArena Spanish | 1464 | — |
Instruction Following Not comparable
Claude Sonnet 4.6: 77.4 (#25), Solar Pro 3: —
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| LMArena Instruction Following | 1475 | — |
Long Context Not comparable
Claude Sonnet 4.6: 45.3 (#44), Solar Pro 3: —
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| LMArena Longer Query | 1479 | — |
Writing & Preference Not comparable
Claude Sonnet 4.6: 70.2 (#22), Solar Pro 3: —
| Benchmark | Claude Sonnet 4.6 | Solar Pro 3 |
|---|---|---|
| LMArena Text | 1458 | — |
| LMArena Creative Writing | 1435 | — |
| EQ-Bench Creative Writing | 1810 | — |
| EQ-Bench 4 | 1207 | — |
| LMArena Multi-Turn | 1464 | — |
Frequently asked questions
Is Claude Sonnet 4.6 better than Solar Pro 3?
Claude Sonnet 4.6 has enough public results to be ranked (#50); Solar Pro 3 does not yet, so treat this comparison as directional.
Which is cheaper, Claude Sonnet 4.6 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; Claude Sonnet 4.6 lists at $3 and $15.
Is Claude Sonnet 4.6 or Solar Pro 3 better for coding?
Claude Sonnet 4.6 scores higher on coding benchmarks: 46.3 versus 34.8 in the Noometry coding category.
Which has the bigger context window?
Claude Sonnet 4.6 does, with 1M tokens against 131K.
How many benchmarks do Claude Sonnet 4.6 and Solar Pro 3 share?
2 benchmarks have published results for both models. Claude Sonnet 4.6 has 57 scored results on Noometry and Solar Pro 3 has 2.