Model comparison
Chatgpt 4o Latest 20250326 vs GPT-5.3 Chat
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 42.8 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 7 categories and GPT-5.3 Chat in 1 category; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Chatgpt 4o Latest 20250326 leads 33.8 to 28.5.
Side by side
| Chatgpt 4o Latest 20250326 | GPT-5.3 Chat | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 43.8 | 42.8 |
| Released | — | 2026-03-03 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 16K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 21 | 18 |
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Category by category
Coding Too close to call
Chatgpt 4o Latest 20250326: 41.6 (#122), GPT-5.3 Chat: 41.4 (#124)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1413 | 1408 |
Reasoning Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 33.8 (#71), GPT-5.3 Chat: 28.5 (#102)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1424 | 1399 |
| Kagi LLM Benchmark | 75% | — |
Math Too close to call
Chatgpt 4o Latest 20250326: 38.6 (#134), GPT-5.3 Chat: 38.2 (#142)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1407 | 1389 |
Knowledge Too close to call
Chatgpt 4o Latest 20250326: 39.2 (#137), GPT-5.3 Chat: 38.8 (#140)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1401 | 1397 |
| Confabulations | 16.6% | — |
Multimodal Not comparable
Chatgpt 4o Latest 20250326: 39.6 (#58), GPT-5.3 Chat: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Vision | 1243 | — |
Multilingual Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 52.9 (#76), GPT-5.3 Chat: 50.3 (#124)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1419 | 1382 |
| LMArena Chinese | 1457 | 1432 |
| LMArena French | 1446 | 1397 |
| LMArena German | 1423 | 1384 |
| LMArena Japanese | 1405 | 1352 |
| LMArena Korean | 1396 | 1346 |
| LMArena Russian | 1429 | 1400 |
| LMArena Spanish | 1434 | 1371 |
Instruction Following Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 74.0 (#107), GPT-5.3 Chat: 72.8 (#129)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1403 | 1378 |
Long Context Too close to call
Chatgpt 4o Latest 20250326: 43.1 (#107), GPT-5.3 Chat: 42.6 (#120)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1413 | 1396 |
Writing & Preference Too close to call
Chatgpt 4o Latest 20250326: 62.6 (#72), GPT-5.3 Chat: 63.1 (#68)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1429 | 1389 |
| LMArena Creative Writing | 1405 | 1355 |
| EQ-Bench Creative Writing | 1501 | 1690 |
| LMArena Multi-Turn | 1454 | 1412 |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than GPT-5.3 Chat?
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 42.8 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or GPT-5.3 Chat better for coding?
They score almost the same on coding (41.6 vs 41.4); test both on your own repository before choosing.
How many benchmarks do Chatgpt 4o Latest 20250326 and GPT-5.3 Chat share?
18 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GPT-5.3 Chat has 18.