Model comparison
Chatgpt 4o Latest 20250326 vs GPT-4.1 nano
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.2 to 27.7 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 9 categories and GPT-4.1 nano in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Chatgpt 4o Latest 20250326 leads 32.8 to 8.6.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Chatgpt 4o Latest 20250326 and 33.3% for GPT-4.1 nano.
Side by side
| Chatgpt 4o Latest 20250326 | GPT-4.1 nano | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 43.2 | 27.7 |
| Released | — | 2025-04-14 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 33K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.40 |
| Results tracked | 21 | 38 |
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Category by category
Coding Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 41.0 (#122), GPT-4.1 nano: 23.8 (#325)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| LMArena Coding | 1413 | 1306 |
| Aider Polyglot | — | 8.9% |
| SciCode | — | 25.9% |
| WeirdML | — | 19% |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, GPT-4.1 nano: 26.3 (#98)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 33% |
Reasoning Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 32.8 (#64), GPT-4.1 nano: 8.6 (#344)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| Kagi LLM Benchmark | 75% | 33.3% |
| LMArena Hard Prompts | 1424 | 1286 |
| ARC-AGI-2 | — | 0% |
| ARC-AGI-1 | — | 0% |
| CritPt | — | 0% |
| DTBench | — | 52.5% |
| LMCA | — | 5.5% |
| Epoch Capabilities Index | — | 129.62 |
Math Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 35.8 (#134), GPT-4.1 nano: 25.5 (#246)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| LMArena Math | 1407 | 1274 |
| OTIS Mock AIME 2024-2025 | — | 28.9% |
| Omni-MATH | — | 36.7% |
| MATH Level 5 | — | 70% |
| FrontierMath (Feb 2025 set) | — | 1% |
Knowledge Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 38.7 (#131), GPT-4.1 nano: 21.8 (#268)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| LMArena Expert | 1400 | 1272 |
| GPQA Diamond | — | 48.9% |
| SimpleQA Verified | — | 6% |
| MMLU-Pro | — | 55% |
| Confabulations | 16.6% | — |
| GPQA (HELM) | — | 50.7% |
Multimodal Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 38.9 (#54), GPT-4.1 nano: 28.6 (#108)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| LMArena Vision | 1243 | 1063 |
Multilingual Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 53.1 (#72), GPT-4.1 nano: 41.8 (#200)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| LMArena Non-English | 1419 | 1260 |
| LMArena Chinese | 1456 | 1270 |
| LMArena German | 1424 | 1288 |
| LMArena Japanese | 1406 | 1199 |
| LMArena Russian | 1429 | 1261 |
| LMArena French | 1447 | — |
| LMArena Korean | 1397 | — |
| LMArena Spanish | 1435 | — |
Instruction Following Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 74.2 (#102), GPT-4.1 nano: 68.0 (#188)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| LMArena Instruction Following | 1403 | 1267 |
| IFEval | — | 84.3% |
Long Context Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 43.1 (#104), GPT-4.1 nano: 23.7 (#291)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| LMArena Longer Query | 1413 | 1283 |
| Fiction.LiveBench | — | 25% |
Writing & Preference Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 62.8 (#68), GPT-4.1 nano: 40.7 (#238)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-4.1 nano |
|---|---|---|
| LMArena Text | 1429 | 1285 |
| LMArena Creative Writing | 1406 | 1260 |
| EQ-Bench Creative Writing | 1501 | 946 |
| LMArena Multi-Turn | 1454 | 1277 |
| WildBench | — | 81.2% |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than GPT-4.1 nano?
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.2 to 27.7 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or GPT-4.1 nano better for coding?
Chatgpt 4o Latest 20250326 scores higher on coding benchmarks: 41.0 versus 23.8 in the Noometry coding category.
How many benchmarks do Chatgpt 4o Latest 20250326 and GPT-4.1 nano share?
17 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GPT-4.1 nano has 38.