# Claude Sonnet 5.5 vs Gemma 4 31B IT

> Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 43.5 on the Noometry Index. Gemma 4 31B IT costs 26× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-gemma-4-31b-it
- Last updated: 2026-10-12
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 9 categories and Gemma 4 31B IT in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 43.2.
- The biggest single-benchmark swing is SimpleQA Verified: 46.5% for Claude Sonnet 5.5 and 10.4% for Gemma 4 31B IT.
- Gemma 4 31B IT is cheaper at $0.09 / $0.34 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 262K.
- Gemma 4 31B IT has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 61.9 | 43.5 |
| Rank | 10 | 90 |
| Context | 1M | 262K |
| Input $/M | $2 | $0.09 |
| Output $/M | $10 | $0.34 |
| Weights | Proprietary | Open |

## Coding

- Claude Sonnet 5.5: 67.3 (#6)
- Gemma 4 31B IT: 42.3 (#108)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| LMArena WebDev | 1774 | 1366 |
| SciCode | 61% | 43.4% |
| LMArena Coding | 1513 | 1459 |
| ALE-Bench | 1,819 | 925.5 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| FrontierSWE | 61.9% | — |
| WeirdML | — | 52.3% |

## Agentic & Tool Use

- Claude Sonnet 5.5: 45.0 (#16)
- Gemma 4 31B IT: —

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| APEX-Agents | 75.5% | — |

## Reasoning

- Claude Sonnet 5.5: 54.0 (#28)
- Gemma 4 31B IT: 27.2 (#122)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| NYT Connections (extended) | 80.5% | 70.6% |
| CritPt | 31.4% | 1.4% |
| LMArena Hard Prompts | 1495 | 1448 |
| Epoch Capabilities Index | 165.03 | 142.74 |
| Kagi LLM Benchmark | — | 63.5% |
| Chess Puzzles | — | 5% |
| Thematic Generalization | — | 53% |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 82.7% |
| LMCA | — | 39.3% |
| Surface Evolver Bench | — | 30.6% |

## Math

- Claude Sonnet 5.5: 87.9 (#6)
- Gemma 4 31B IT: 43.2 (#81)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 73.3% |
| LMArena Math | 1510 | 1465 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| ProofBench | 100% | — |
| FrontierMath Erdős | 2.9% | — |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#12)
- Gemma 4 31B IT: 37.9 (#151)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| GPQA Diamond | 95.6% | 75.8% |
| SimpleQA Verified | 46.5% | 10.4% |
| LMArena Expert | 1540 | 1465 |
| Vectara Hallucination Rate | — | 7.4% |

## Multimodal

- Claude Sonnet 5.5: 51.5 (#6)
- Gemma 4 31B IT: 41.6 (#34)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| LMArena Vision | 1289 | 1277 |
| Furniture Assembly | 75% | — |
| LMArena Document | — | 1425 |

## Multilingual

- Claude Sonnet 5.5: 55.3 (#30)
- Gemma 4 31B IT: 53.8 (#57)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| LMArena Non-English | 1452 | 1431 |
| LMArena Chinese | 1522 | 1476 |
| LMArena Russian | 1451 | 1460 |
| LMArena French | — | 1435 |
| LMArena Spanish | — | 1444 |

## Instruction Following

- Claude Sonnet 5.5: 78.3 (#11)
- Gemma 4 31B IT: 75.5 (#61)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| LMArena Instruction Following | 1495 | 1433 |

## Long Context

- Claude Sonnet 5.5: 45.9 (#28)
- Gemma 4 31B IT: 44.2 (#71)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| LMArena Longer Query | 1498 | 1446 |

## Writing & Preference

- Claude Sonnet 5.5: 66.0 (#40)
- Gemma 4 31B IT: 60.5 (#96)

| Benchmark | Claude Sonnet 5.5 | Gemma 4 31B IT |
|---|---|---|
| LMArena Text | 1471 | 1443 |
| LMArena Creative Writing | 1465 | 1415 |
| LMArena Multi-Turn | 1474 | 1452 |
| EQ-Bench Creative Writing | — | 1368 |
| EQ-Bench 4 | — | 1120 |

## FAQ

### Is Claude Sonnet 5.5 better than Gemma 4 31B IT?

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 43.5 on the Noometry Index. Gemma 4 31B IT costs 26× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

### Which is cheaper, Claude Sonnet 5.5 or Gemma 4 31B IT?

Gemma 4 31B IT is cheaper. It lists at $0.09 per million input tokens and $0.34 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

### Is Claude Sonnet 5.5 or Gemma 4 31B IT better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 42.3 in the Noometry coding category.

### Which has the bigger context window?

Claude Sonnet 5.5 does, with 1M tokens against 262K.

### How many benchmarks do Claude Sonnet 5.5 and Gemma 4 31B IT share?

22 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Gemma 4 31B IT has 35.