Model comparison
Chatgpt 4o Latest 20250326 vs Claude Sonnet 5.5
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 43.8 on the Noometry Index.
Last verified . 13 shared benchmarks.
Summary
- They share 13 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 0 categories and Claude Sonnet 5.5 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 38.6.
Side by side
| Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Noometry Index | 43.8 | 61.9 |
| Released | — | 2026-09-28 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 128K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $10 |
| Results tracked | 21 | 32 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 41.6 (#122), Claude Sonnet 5.5: 67.3 (#6)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Coding | 1413 | 1513 |
| FrontierCode | — | 52.1% |
| CursorBench | — | 55.5% |
| LMArena WebDev | — | 1774 |
| FrontierSWE | — | 61.9% |
| SciCode | — | 61% |
| ALE-Bench | — | 1,819 |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, Claude Sonnet 5.5: 45.0 (#16)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| APEX-Agents | — | 75.5% |
Reasoning Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 33.8 (#71), Claude Sonnet 5.5: 54.0 (#28)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Hard Prompts | 1424 | 1495 |
| Kagi LLM Benchmark | 75% | — |
| NYT Connections (extended) | — | 80.5% |
| CritPt | — | 31.4% |
| Mystery Game Puzzles | — | 65% |
| Epoch Capabilities Index | — | 165.03 |
Math Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 38.6 (#134), Claude Sonnet 5.5: 87.9 (#6)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Math | 1407 | 1510 |
| FrontierMath (Tiers 1-3) | — | 88.8% |
| FrontierMath Tier 4 | — | 80.5% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 100% |
| FrontierMath Erdős | — | 2.9% |
Knowledge Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 39.2 (#137), Claude Sonnet 5.5: 66.0 (#12)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Expert | 1401 | 1540 |
| GPQA Diamond | — | 95.6% |
| SimpleQA Verified | — | 46.5% |
| Confabulations | 16.6% | — |
Multimodal Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 39.6 (#58), Claude Sonnet 5.5: 51.5 (#6)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Vision | 1243 | 1289 |
| Furniture Assembly | — | 75% |
Multilingual Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 52.9 (#76), Claude Sonnet 5.5: 55.3 (#30)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Non-English | 1419 | 1452 |
| LMArena Chinese | 1457 | 1522 |
| LMArena Russian | 1429 | 1451 |
| LMArena French | 1446 | — |
| LMArena German | 1423 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1396 | — |
| LMArena Spanish | 1434 | — |
Instruction Following Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 74.0 (#107), Claude Sonnet 5.5: 78.3 (#11)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Instruction Following | 1403 | 1495 |
Long Context Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 43.1 (#107), Claude Sonnet 5.5: 45.9 (#28)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Longer Query | 1413 | 1498 |
Writing & Preference Claude Sonnet 5.5 leads
Chatgpt 4o Latest 20250326: 62.6 (#72), Claude Sonnet 5.5: 66.0 (#40)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Sonnet 5.5 |
|---|---|---|
| LMArena Text | 1429 | 1471 |
| LMArena Creative Writing | 1405 | 1465 |
| LMArena Multi-Turn | 1454 | 1474 |
| EQ-Bench Creative Writing | 1501 | — |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than Claude Sonnet 5.5?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 43.8 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: 67.3 versus 41.6 in the Noometry coding category.
How many benchmarks do Chatgpt 4o Latest 20250326 and Claude Sonnet 5.5 share?
13 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Claude Sonnet 5.5 has 32.