# Claude Haiku 5.5 vs Solar Pro4

> Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 42.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-haiku-5-5-vs-solar-pro4
- Last updated: 2026-10-12
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Claude Haiku 5.5 scores higher in 4 categories and Solar Pro4 in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 38.8.
- Claude Haiku 5.5 is cheaper at $0.10 / $0.50 per million input/output tokens, against $0.30 / $1.20 for Solar Pro4.
- Claude Haiku 5.5 accepts more context: 1M tokens versus 524K.

## Snapshot

| | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| Provider | Anthropic | Upstage |
| Noometry Index | 49.5 | 42.1 |
| Rank | 52 | 121 |
| Context | 1M | 524K |
| Input $/M | $0.10 | $0.30 |
| Output $/M | $0.50 | $1.20 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Haiku 5.5: 49.2 (#50)
- Solar Pro4: 40.1 (#149)

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| LMArena WebDev | 1587 | 1371 |
| LMArena Coding | — | 1437 |

## Reasoning

- Claude Haiku 5.5: 35.2 (#69)
- Solar Pro4: 28.5 (#104)

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| NYT Connections (extended) | 65.7% | — |
| LMArena Hard Prompts | — | 1399 |
| Mystery Game Puzzles | 30% | — |

## Math

- Claude Haiku 5.5: 73.6 (#18)
- Solar Pro4: 38.8 (#128)

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 75.1% | — |
| FrontierMath Tier 4 | 46.3% | — |
| OTIS Mock AIME 2024-2025 | 98.9% | — |
| LMArena Math | — | 1416 |

## Knowledge

- Claude Haiku 5.5: 50.8 (#70)
- Solar Pro4: 39.8 (#129)

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| GPQA Diamond | 89.6% | — |
| SimpleQA Verified | 23.8% | — |
| LMArena Expert | — | 1427 |

## Multimodal

- Claude Haiku 5.5: 43.7 (#21)
- Solar Pro4: —

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| Furniture Assembly | 47.5% | — |

## Multilingual

- Claude Haiku 5.5: —
- Solar Pro4: 48.7 (#139)

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| LMArena Non-English | — | 1361 |
| LMArena Chinese | — | 1415 |
| LMArena French | — | 1397 |
| LMArena German | — | 1364 |
| LMArena Japanese | — | 1309 |
| LMArena Korean | — | 1382 |
| LMArena Russian | — | 1360 |
| LMArena Spanish | — | 1401 |

## Instruction Following

- Claude Haiku 5.5: —
- Solar Pro4: 72.7 (#132)

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | — | 1377 |

## Long Context

- Claude Haiku 5.5: —
- Solar Pro4: 42.1 (#130)

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | — | 1381 |

## Writing & Preference

- Claude Haiku 5.5: —
- Solar Pro4: 56.5 (#138)

| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| LMArena Text | — | 1386 |
| LMArena Creative Writing | — | 1316 |
| LMArena Multi-Turn | — | 1385 |

## FAQ

### Is Claude Haiku 5.5 better than Solar Pro4?

Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 42.1 on the Noometry Index.

### Which is cheaper, Claude Haiku 5.5 or Solar Pro4?

Claude Haiku 5.5 is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; Solar Pro4 lists at $0.30 and $1.20.

### Is Claude Haiku 5.5 or Solar Pro4 better for coding?

Claude Haiku 5.5 scores higher on coding benchmarks: 49.2 versus 40.1 in the Noometry coding category.

### Which has the bigger context window?

Claude Haiku 5.5 does, with 1M tokens against 524K.

### How many benchmarks do Claude Haiku 5.5 and Solar Pro4 share?

1 benchmark has published results for both models. Claude Haiku 5.5 has 9 scored results on Noometry and Solar Pro4 has 18.