# Chatgpt 4o Latest 20250326 vs Claude Sonnet 5.5

> Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 43.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/chatgpt-4o-vs-claude-sonnet-5-5
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 35.8.

## Snapshot

| | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Noometry Index | 43.2 | 60.5 |
| Rank | 84 | 10 |
| Context | — | 1M |
| Input $/M | — | $2 |
| Output $/M | — | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- Chatgpt 4o Latest 20250326: 41.0 (#122)
- Claude Sonnet 5.5: 65.5 (#6)

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| FrontierCode | — | 52.1% |
| CursorBench | — | 55.5% |
| LMArena WebDev | — | 1699 |
| FrontierSWE | — | 61.9% |
| SciCode | — | 61% |
| LMArena Coding | 1413 | — |
| ALE-Bench | — | 1,819 |

## Agentic & Tool Use

- Chatgpt 4o Latest 20250326: —
- Claude Sonnet 5.5: 44.9 (#14)

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| APEX-Agents | — | 75.5% |

## Reasoning

- Chatgpt 4o Latest 20250326: 32.8 (#64)
- Claude Sonnet 5.5: 52.4 (#29)

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| Kagi LLM Benchmark | 75% | — |
| CritPt | — | 31.4% |
| LMArena Hard Prompts | 1424 | — |
| Mystery Game Puzzles | — | 65% |

## Math

- Chatgpt 4o Latest 20250326: 35.8 (#134)
- Claude Sonnet 5.5: 88.7 (#4)

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 88.8% |
| FrontierMath Tier 4 | — | 80.5% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 100% |
| LMArena Math | 1407 | — |

## Knowledge

- Chatgpt 4o Latest 20250326: 38.7 (#131)
- Claude Sonnet 5.5: 66.0 (#11)

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| GPQA Diamond | — | 95.6% |
| SimpleQA Verified | — | 46.5% |
| Confabulations | 16.6% | — |
| LMArena Expert | 1400 | — |

## Multimodal

- Chatgpt 4o Latest 20250326: 38.9 (#54)
- Claude Sonnet 5.5: 53.2 (#5)

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Vision | 1243 | — |
| Furniture Assembly | — | 75% |

## Multilingual

- Chatgpt 4o Latest 20250326: 53.1 (#72)
- Claude Sonnet 5.5: —

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Non-English | 1419 | — |
| LMArena Chinese | 1456 | — |
| LMArena French | 1447 | — |
| LMArena German | 1424 | — |
| LMArena Japanese | 1406 | — |
| LMArena Korean | 1397 | — |
| LMArena Russian | 1429 | — |
| LMArena Spanish | 1435 | — |

## Instruction Following

- Chatgpt 4o Latest 20250326: 74.2 (#102)
- Claude Sonnet 5.5: —

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Instruction Following | 1403 | — |

## Long Context

- Chatgpt 4o Latest 20250326: 43.1 (#104)
- Claude Sonnet 5.5: —

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Longer Query | 1413 | — |

## Writing & Preference

- Chatgpt 4o Latest 20250326: 62.8 (#68)
- Claude Sonnet 5.5: —

| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Text | 1429 | — |
| LMArena Creative Writing | 1406 | — |
| EQ-Bench Creative Writing | 1501 | — |
| LMArena Multi-Turn | 1454 | — |

## FAQ

### Is Chatgpt 4o Latest 20250326 better than Claude Sonnet 5.5?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 43.2 on the Noometry Index.

### Is Chatgpt 4o Latest 20250326 or Claude Sonnet 5.5 better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 41.0 in the Noometry coding category.

### How many benchmarks do Chatgpt 4o Latest 20250326 and Claude Sonnet 5.5 share?

0 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Claude Sonnet 5.5 has 16.