Model comparison
Chatgpt 4o Latest 20250326 vs GPT-5.3 Codex
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 43.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in coding, where GPT-5.3 Codex leads 48.6 to 41.6.
Side by side
| Chatgpt 4o Latest 20250326 | GPT-5.3 Codex | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 43.8 | 45.8 |
| Released | — | 2026-02-05 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 21 | 8 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-5.3 Codex leads
Chatgpt 4o Latest 20250326: 41.6 (#122), GPT-5.3 Codex: 48.6 (#56)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| SWE-bench Verified | — | 74.8% |
| LMArena WebDev | — | 1409 |
| WeirdML | — | 79.3% |
| LMArena Coding | 1413 | — |
| ALE-Bench | — | 1,655 |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, GPT-5.3 Codex: 48.0 (#9)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| Terminal-Bench | — | 78.4% |
| METR Time Horizons | — | 74.5% |
| Vending-Bench 2 | — | 5,940 |
Reasoning Not comparable
Chatgpt 4o Latest 20250326: 33.8 (#71), GPT-5.3 Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| Kagi LLM Benchmark | 75% | — |
| LMArena Hard Prompts | 1424 | — |
| Epoch Capabilities Index | — | 156.77 |
Math Not comparable
Chatgpt 4o Latest 20250326: 38.6 (#134), GPT-5.3 Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| LMArena Math | 1407 | — |
Knowledge Not comparable
Chatgpt 4o Latest 20250326: 39.2 (#137), GPT-5.3 Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| Confabulations | 16.6% | — |
| LMArena Expert | 1401 | — |
Multimodal Not comparable
Chatgpt 4o Latest 20250326: 39.6 (#58), GPT-5.3 Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| LMArena Vision | 1243 | — |
Multilingual Not comparable
Chatgpt 4o Latest 20250326: 52.9 (#76), GPT-5.3 Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| LMArena Non-English | 1419 | — |
| LMArena Chinese | 1457 | — |
| LMArena French | 1446 | — |
| LMArena German | 1423 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1396 | — |
| LMArena Russian | 1429 | — |
| LMArena Spanish | 1434 | — |
Instruction Following Not comparable
Chatgpt 4o Latest 20250326: 74.0 (#107), GPT-5.3 Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| LMArena Instruction Following | 1403 | — |
Long Context Not comparable
Chatgpt 4o Latest 20250326: 43.1 (#107), GPT-5.3 Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| LMArena Longer Query | 1413 | — |
Writing & Preference Not comparable
Chatgpt 4o Latest 20250326: 62.6 (#72), GPT-5.3 Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.3 Codex |
|---|---|---|
| LMArena Text | 1429 | — |
| LMArena Creative Writing | 1405 | — |
| EQ-Bench Creative Writing | 1501 | — |
| LMArena Multi-Turn | 1454 | — |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than GPT-5.3 Codex?
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 43.8 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or GPT-5.3 Codex better for coding?
GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 41.6 in the Noometry coding category.
How many benchmarks do Chatgpt 4o Latest 20250326 and GPT-5.3 Codex share?
0 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GPT-5.3 Codex has 8.