# Gemini 2.5 Flash-Lite vs Sonar

> Sonar is the stronger model overall, scoring 38.5 to 37.0 on the Noometry Index. Gemini 2.5 Flash-Lite costs 5.7× less per token, which makes it the better buy when Sonar's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-2-5-flash-lite-vs-sonar
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in writing & preference, where Gemini 2.5 Flash-Lite leads 56.8 to 52.6.
- Gemini 2.5 Flash-Lite is cheaper at $0.10 / $0.40 per million input/output tokens, against $1 / $1 for Sonar.
- Gemini 2.5 Flash-Lite accepts more context: 1.05M tokens versus 128K.

## Snapshot

| | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| Provider | Google | Perplexity |
| Noometry Index | 37.0 | 38.5 |
| Rank | 211 | 187 |
| Context | 1.05M | 128K |
| Input $/M | $0.10 | $1 |
| Output $/M | $0.40 | $1 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 2.5 Flash-Lite: 38.5 (#173)
- Sonar: 35.7 (#221)

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| WeirdML | 35.2% | — |
| LiveBench Coding | — | 35.1% |
| LMArena Coding | 1373 | — |
| ALE-Bench | 325.9 | — |

## Agentic & Tool Use

- Gemini 2.5 Flash-Lite: 28.0 (#96)
- Sonar: —

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| Berkeley Function Calling Leaderboard | 36.9% | — |

## Reasoning

- Gemini 2.5 Flash-Lite: 22.2 (#205)
- Sonar: 21.1 (#227)

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| Kagi LLM Benchmark | 40.5% | — |
| LiveBench Reasoning | — | 46.3% |
| LMArena Hard Prompts | 1377 | — |
| DTBench | 62.8% | — |
| LiveBench Data Analysis | — | 37.9% |
| LMCA | 18.1% | — |
| Epoch Capabilities Index | 133.94 | — |
| LiveBench | — | 46.9% |

## Math

- Gemini 2.5 Flash-Lite: 38.0 (#144)
- Sonar: 33.7 (#200)

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| Omni-MATH | 48% | — |
| LiveBench Math | — | 41.6% |
| LMArena Math | 1373 | — |

## Knowledge

- Gemini 2.5 Flash-Lite: 32.5 (#210)
- Sonar: —

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| MMLU-Pro | 53.7% | — |
| Vectara Hallucination Rate | 3.3% | — |
| GPQA (HELM) | 30.9% | — |
| LMArena Expert | 1373 | — |

## Multimodal

- Gemini 2.5 Flash-Lite: 29.1 (#114)
- Sonar: —

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| LMArena Vision | 1198 | — |
| VPCT | 30% | — |

## Multilingual

- Gemini 2.5 Flash-Lite: 49.3 (#134)
- Sonar: —

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| LMArena Non-English | 1369 | — |
| LMArena Chinese | 1404 | — |
| LMArena French | 1388 | — |
| LMArena German | 1389 | — |
| LMArena Japanese | 1359 | — |
| LMArena Korean | 1360 | — |
| LMArena Russian | 1373 | — |
| LMArena Spanish | 1396 | — |

## Instruction Following

- Gemini 2.5 Flash-Lite: 70.0 (#168)
- Sonar: 71.4 (#150)

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
| IFEval | 81% | — |
| LMArena Instruction Following | 1367 | — |

## Long Context

- Gemini 2.5 Flash-Lite: 33.3 (#262)
- Sonar: —

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| Fiction.LiveBench | 47.2% | — |
| LMArena Longer Query | 1373 | — |

## Writing & Preference

- Gemini 2.5 Flash-Lite: 56.8 (#135)
- Sonar: 52.6 (#167)

| Benchmark | Gemini 2.5 Flash-Lite | Sonar |
|---|---|---|
| LMArena Text | 1379 | — |
| LMArena Creative Writing | 1367 | — |
| WildBench | 81.8% | — |
| LMArena Multi-Turn | 1366 | — |
| LiveBench Language | — | 44.1% |

## FAQ

### Is Gemini 2.5 Flash-Lite better than Sonar?

Sonar is the stronger model overall, scoring 38.5 to 37.0 on the Noometry Index. Gemini 2.5 Flash-Lite costs 5.7× less per token, which makes it the better buy when Sonar's lead doesn't matter for your workload.

### Which is cheaper, Gemini 2.5 Flash-Lite or Sonar?

Gemini 2.5 Flash-Lite is cheaper. It lists at $0.10 per million input tokens and $0.40 per million output tokens; Sonar lists at $1 and $1.

### Is Gemini 2.5 Flash-Lite or Sonar better for coding?

Gemini 2.5 Flash-Lite scores higher on coding benchmarks: 38.5 versus 35.7 in the Noometry coding category.

### Which has the bigger context window?

Gemini 2.5 Flash-Lite does, with 1.05M tokens against 128K.

### How many benchmarks do Gemini 2.5 Flash-Lite and Sonar share?

0 benchmarks have published results for both models. Gemini 2.5 Flash-Lite has 33 scored results on Noometry and Sonar has 7.