# GPT-4.5 vs Sonar

> GPT-4.5 and Sonar score almost the same on the Noometry Index (36.9 vs 37.8), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-4-5-vs-sonar
- Last updated: 2026-10-10
- Shared benchmarks: 7

## Summary

- They share 7 benchmarks with published results for both. GPT-4.5 scores higher in 3 categories and Sonar in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in coding, where GPT-4.5 leads 41.8 to 35.1.
- The biggest single-benchmark swing is LiveBench Coding: 75.2% for GPT-4.5 and 35.1% for Sonar.

## Snapshot

| | GPT-4.5 | Sonar |
|---|---|---|
| Provider | OpenAI | Perplexity |
| Noometry Index | 36.9 | 37.8 |
| Rank | 200 | 184 |
| Context | — | 128K |
| Input $/M | — | $1 |
| Output $/M | — | $1 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-4.5: 41.8 (#102)
- Sonar: 35.1 (#217)

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| LiveBench Coding | 75.2% | 35.1% |
| Aider Polyglot | 44.9% | — |
| WeirdML | 39.4% | — |
| LMArena Coding | 1397 | — |

## Agentic & Tool Use

- GPT-4.5: 27.6 (#92)
- Sonar: —

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| Cybench | 17.5% | — |

## Reasoning

- GPT-4.5: 14.1 (#320)
- Sonar: 20.3 (#221)

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| LiveBench Reasoning | 71.1% | 46.3% |
| LiveBench Data Analysis | 64.3% | 37.9% |
| LiveBench | 69% | 46.9% |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 34.5% | — |
| ARC-AGI-1 | 10.3% | — |
| EnigmaEval | 3.2% | — |
| LMArena Hard Prompts | 1404 | — |
| Epoch Capabilities Index | 136.74 | — |
| ForecastBench | 61.7 | — |

## Math

- GPT-4.5: 31.0 (#200)
- Sonar: 31.3 (#197)

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| LiveBench Math | 69.3% | 41.6% |
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| LMArena Math | 1412 | — |
| MATH Level 5 | 78.6% | — |

## Knowledge

- GPT-4.5: 32.4 (#205)
- Sonar: —

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| GPQA Diamond | 68.7% | — |
| Humanity's Last Exam | 5.4% | — |
| Confabulations | 13.6% | — |
| LMArena Expert | 1394 | — |

## Multimodal

- GPT-4.5: 37.0 (#68)
- Sonar: —

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| LMArena Vision | 1195 | — |
| VPCT | 45% | — |

## Multilingual

- GPT-4.5: 52.7 (#78)
- Sonar: —

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| LMArena Non-English | 1413 | — |
| LMArena Chinese | 1421 | — |
| LMArena French | 1417 | — |
| LMArena German | 1457 | — |
| LMArena Japanese | 1416 | — |
| LMArena Korean | 1392 | — |
| LMArena Russian | 1419 | — |

## Instruction Following

- GPT-4.5: 72.8 (#129)
- Sonar: 71.5 (#146)

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| LiveBench Instruction Following | 72.3% | 76.2% |
| LMArena Instruction Following | 1404 | — |

## Long Context

- GPT-4.5: 40.4 (#150)
- Sonar: —

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| Fiction.LiveBench | 63.9% | — |
| LMArena Longer Query | 1406 | — |

## Writing & Preference

- GPT-4.5: 57.1 (#129)
- Sonar: 52.6 (#166)

| Benchmark | GPT-4.5 | Sonar |
|---|---|---|
| LiveBench Language | 61.5% | 44.1% |
| LMArena Text | 1417 | — |
| LMArena Creative Writing | 1394 | — |
| Short-Story Creative Writing | 75.6% | — |
| EQ-Bench Creative Writing | 1258 | — |
| LMArena Multi-Turn | 1444 | — |

## FAQ

### Is GPT-4.5 better than Sonar?

GPT-4.5 and Sonar score almost the same on the Noometry Index (36.9 vs 37.8), so choose on price, context window or the category you care about most.

### Is GPT-4.5 or Sonar better for coding?

GPT-4.5 scores higher on coding benchmarks: 41.8 versus 35.1 in the Noometry coding category.

### How many benchmarks do GPT-4.5 and Sonar share?

7 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Sonar has 7.