# Grok 4.3 vs Solar Pro4

> Grok 4.3 is the stronger model overall, scoring 43.6 to 41.5 on the Noometry Index. Solar Pro4 costs 3.0× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/grok-4-3-vs-solar-pro4
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Grok 4.3 scores higher in 7 categories and Solar Pro4 in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 39.0.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Grok 4.3 accepts more context: 1M tokens versus 524K.

## Snapshot

| | Grok 4.3 | Solar Pro4 |
|---|---|---|
| Provider | xAI | Upstage |
| Noometry Index | 43.6 | 41.5 |
| Rank | 80 | 123 |
| Context | 1M | 524K |
| Input $/M | $1.25 | $0.30 |
| Output $/M | $2.50 | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.3: 41.3 (#117)
- Solar Pro4: 39.9 (#135)

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena WebDev | 1357 | 1371 |
| LMArena Coding | 1415 | 1439 |
| SciCode | 47.3% | — |
| WeirdML | 49.9% | — |
| ALE-Bench | 944.17 | — |

## Agentic & Tool Use

- Grok 4.3: 27.6 (#93)
- Solar Pro4: —

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |

## Reasoning

- Grok 4.3: 34.9 (#60)
- Solar Pro4: 27.3 (#107)

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1397 | 1398 |
| NYT Connections (extended) | 55.2% | — |
| CritPt | 8% | — |
| Chess Puzzles | 25% | — |
| DTBench | 90.7% | — |
| LMCA | 38.3% | — |
| Epoch Capabilities Index | 149.13 | — |
| ForecastBench | 60.3 | — |

## Math

- Grok 4.3: 45.8 (#60)
- Solar Pro4: 36.1 (#129)

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena Math | 1388 | 1418 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 11% | — |

## Knowledge

- Grok 4.3: 52.5 (#57)
- Solar Pro4: 39.0 (#128)

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1385 | 1421 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |

## Multimodal

- Grok 4.3: 31.6 (#96)
- Solar Pro4: —

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena Vision | 1231 | — |
| Blueprint-Bench 2 | 0% | — |

## Multilingual

- Grok 4.3: 50.7 (#114)
- Solar Pro4: 49.0 (#134)

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1385 | 1362 |
| LMArena Chinese | 1423 | 1417 |
| LMArena French | 1412 | 1403 |
| LMArena German | 1395 | 1351 |
| LMArena Japanese | 1379 | 1300 |
| LMArena Korean | 1357 | 1383 |
| LMArena Russian | 1399 | 1360 |
| LMArena Spanish | 1402 | 1408 |

## Instruction Following

- Grok 4.3: 72.3 (#135)
- Solar Pro4: 72.8 (#128)

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1366 | 1376 |

## Long Context

- Grok 4.3: 42.5 (#118)
- Solar Pro4: 42.0 (#125)

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1393 | 1379 |

## Writing & Preference

- Grok 4.3: 58.6 (#112)
- Solar Pro4: 56.7 (#133)

| Benchmark | Grok 4.3 | Solar Pro4 |
|---|---|---|
| LMArena Text | 1397 | 1386 |
| LMArena Creative Writing | 1380 | 1313 |
| LMArena Multi-Turn | 1406 | 1391 |
| EQ-Bench 4 | 1075 | — |

## FAQ

### Is Grok 4.3 better than Solar Pro4?

Grok 4.3 is the stronger model overall, scoring 43.6 to 41.5 on the Noometry Index. Solar Pro4 costs 3.0× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.

### Which is cheaper, Grok 4.3 or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.

### Is Grok 4.3 or Solar Pro4 better for coding?

Grok 4.3 scores higher on coding benchmarks: 41.3 versus 39.9 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.3 does, with 1M tokens against 524K.

### How many benchmarks do Grok 4.3 and Solar Pro4 share?

18 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and Solar Pro4 has 18.