Model comparison
Chatgpt 4o Latest 20250326 vs GPT-5-Codex
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 37.9 on the Noometry Index.
Last verified . 1 shared benchmarks.
Summary
- They share 1 benchmark with published results for both. Chatgpt 4o Latest 20250326 scores higher in 1 category and GPT-5-Codex in 1 category; one gap is clear of the uncertainty.
Side by side
| Chatgpt 4o Latest 20250326 | GPT-5-Codex | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 43.8 | 37.9 |
| Released | — | 2025-09-15 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 21 | 3 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Too close to call
Chatgpt 4o Latest 20250326: 41.6 (#122), GPT-5-Codex: 42.4 (#103)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-Codex |
|---|---|---|
| WeirdML | — | 54.5% |
| LMArena Coding | 1413 | — |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, GPT-5-Codex: 31.0 (#72)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-Codex |
|---|---|---|
| Terminal-Bench | — | 44.3% |
Reasoning Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 33.8 (#71), GPT-5-Codex: 30.9 (#83)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-Codex |
|---|---|---|
| Kagi LLM Benchmark | 75% | 70.3% |
| LMArena Hard Prompts | 1424 | — |
Math Not comparable
Chatgpt 4o Latest 20250326: 38.6 (#134), GPT-5-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-Codex |
|---|---|---|
| LMArena Math | 1407 | — |
Knowledge Not comparable
Chatgpt 4o Latest 20250326: 39.2 (#137), GPT-5-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-Codex |
|---|---|---|
| Confabulations | 16.6% | — |
| LMArena Expert | 1401 | — |
Multimodal Not comparable
Chatgpt 4o Latest 20250326: 39.6 (#58), GPT-5-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-Codex |
|---|---|---|
| LMArena Vision | 1243 | — |
Multilingual Not comparable
Chatgpt 4o Latest 20250326: 52.9 (#76), GPT-5-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-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-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-Codex |
|---|---|---|
| LMArena Instruction Following | 1403 | — |
Long Context Not comparable
Chatgpt 4o Latest 20250326: 43.1 (#107), GPT-5-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-Codex |
|---|---|---|
| LMArena Longer Query | 1413 | — |
Writing & Preference Not comparable
Chatgpt 4o Latest 20250326: 62.6 (#72), GPT-5-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5-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-Codex?
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 37.9 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or GPT-5-Codex better for coding?
They score almost the same on coding (41.6 vs 42.4); test both on your own repository before choosing.
How many benchmarks do Chatgpt 4o Latest 20250326 and GPT-5-Codex share?
1 benchmark has published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GPT-5-Codex has 3.