Model comparison
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.
Last verified . 1 shared benchmarks.
UpstageSummary
- 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.
Side by side
| Claude Haiku 5.5 | Solar Pro4 | |
|---|---|---|
| Provider | Anthropic | Upstage |
| Noometry Index | 49.5 | 42.1 |
| Released | 2026-10-07 | 2026-08-06 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 524K |
| Max output | 128K | 131K |
| Input $ / M tokens | $0.10 | $0.30 |
| Output $ / M tokens | $0.50 | $1.20 |
| Results tracked | 9 | 18 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Haiku 5.5 leads
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 leads
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 leads
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 leads
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 Not comparable
Claude Haiku 5.5: 43.7 (#21), Solar Pro4: —
| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| Furniture Assembly | 47.5% | — |
Multilingual Not comparable
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 Not comparable
Claude Haiku 5.5: —, Solar Pro4: 72.7 (#132)
| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | — | 1377 |
Long Context Not comparable
Claude Haiku 5.5: —, Solar Pro4: 42.1 (#130)
| Benchmark | Claude Haiku 5.5 | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | — | 1381 |
Writing & Preference Not comparable
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 |
Frequently asked questions
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.