# o3-pro vs Sonar

> o3-pro is the stronger model overall, scoring 42.9 to 38.5 on the Noometry Index. Sonar costs 35× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/o3-pro-vs-sonar
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where o3-pro leads 55.5 to 35.7.
- Sonar is cheaper at $1 / $1 per million input/output tokens, against $20 / $80 for o3-pro.
- o3-pro accepts more context: 200K tokens versus 128K.

## Snapshot

| | o3-pro | Sonar |
|---|---|---|
| Provider | OpenAI | Perplexity |
| Noometry Index | 42.9 | 38.5 |
| Rank | 105 | 187 |
| Context | 200K | 128K |
| Input $/M | $20 | $1 |
| Output $/M | $80 | $1 |
| Weights | Proprietary | Proprietary |

## Coding

- o3-pro: 55.5 (#24)
- Sonar: 35.7 (#221)

| Benchmark | o3-pro | Sonar |
|---|---|---|
| Aider Polyglot | 84.9% | — |
| WeirdML | 58.2% | — |
| LiveBench Coding | — | 35.1% |

## Reasoning

- o3-pro: 23.8 (#171)
- Sonar: 21.1 (#227)

| Benchmark | o3-pro | Sonar |
|---|---|---|
| ARC-AGI-2 | 4.9% | — |
| Kagi LLM Benchmark | 72.1% | — |
| ARC-AGI-1 | 59.3% | — |
| LiveBench Reasoning | — | 46.3% |
| DTBench | 86.9% | — |
| LiveBench Data Analysis | — | 37.9% |
| LMCA | 38.5% | — |
| Epoch Capabilities Index | 147.42 | — |
| LiveBench | — | 46.9% |

## Math

- o3-pro: —
- Sonar: 33.7 (#200)

| Benchmark | o3-pro | Sonar |
|---|---|---|
| LiveBench Math | — | 41.6% |

## Knowledge

- o3-pro: 29.5 (#238)
- Sonar: —

| Benchmark | o3-pro | Sonar |
|---|---|---|
| Confabulations | 14.2% | — |
| Vectara Hallucination Rate | 23.3% | — |

## Instruction Following

- o3-pro: —
- Sonar: 71.4 (#150)

| Benchmark | o3-pro | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |

## Long Context

- o3-pro: 72.2 (#1)
- Sonar: —

| Benchmark | o3-pro | Sonar |
|---|---|---|
| Fiction.LiveBench | 97.2% | — |

## Writing & Preference

- o3-pro: 57.1 (#133)
- Sonar: 52.6 (#167)

| Benchmark | o3-pro | Sonar |
|---|---|---|
| Short-Story Creative Writing | 84.4% | — |
| LiveBench Language | — | 44.1% |

## FAQ

### Is o3-pro better than Sonar?

o3-pro is the stronger model overall, scoring 42.9 to 38.5 on the Noometry Index. Sonar costs 35× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.

### Which is cheaper, o3-pro or Sonar?

Sonar is cheaper. It lists at $1 per million input tokens and $1 per million output tokens; o3-pro lists at $20 and $80.

### Is o3-pro or Sonar better for coding?

o3-pro scores higher on coding benchmarks: 55.5 versus 35.7 in the Noometry coding category.

### Which has the bigger context window?

o3-pro does, with 200K tokens against 128K.

### How many benchmarks do o3-pro and Sonar share?

0 benchmarks have published results for both models. o3-pro has 12 scored results on Noometry and Sonar has 7.