Model comparison
Chatgpt 4o Latest 20250326 vs GPT-5.1-Codex
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 38.6 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where Chatgpt 4o Latest 20250326 leads 38.6 to 30.3.
Side by side
| Chatgpt 4o Latest 20250326 | GPT-5.1-Codex | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 43.8 | 38.6 |
| Released | — | 2025-11-12 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 21 | 6 |
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Category by category
Coding Too close to call
Chatgpt 4o Latest 20250326: 41.6 (#122), GPT-5.1-Codex: 41.9 (#116)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-Codex |
|---|---|---|
| SWE-bench Verified (bash only) | — | 66% |
| LMArena WebDev | — | 1337 |
| LMArena Coding | 1413 | — |
| ALE-Bench | — | 1,245 |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, GPT-5.1-Codex: 38.0 (#33)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-Codex |
|---|---|---|
| Terminal-Bench | — | 60.4% |
| METR Time Horizons | — | 70.8% |
Reasoning Not comparable
Chatgpt 4o Latest 20250326: 33.8 (#71), GPT-5.1-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-Codex |
|---|---|---|
| Kagi LLM Benchmark | 75% | — |
| LMArena Hard Prompts | 1424 | — |
Math Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 38.6 (#134), GPT-5.1-Codex: 30.3 (#235)
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-Codex |
|---|---|---|
| ProofBench | — | 9% |
| LMArena Math | 1407 | — |
Knowledge Not comparable
Chatgpt 4o Latest 20250326: 39.2 (#137), GPT-5.1-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-Codex |
|---|---|---|
| Confabulations | 16.6% | — |
| LMArena Expert | 1401 | — |
Multimodal Not comparable
Chatgpt 4o Latest 20250326: 39.6 (#58), GPT-5.1-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-Codex |
|---|---|---|
| LMArena Vision | 1243 | — |
Multilingual Not comparable
Chatgpt 4o Latest 20250326: 52.9 (#76), GPT-5.1-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-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-5.1-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-Codex |
|---|---|---|
| LMArena Instruction Following | 1403 | — |
Long Context Not comparable
Chatgpt 4o Latest 20250326: 43.1 (#107), GPT-5.1-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-Codex |
|---|---|---|
| LMArena Longer Query | 1413 | — |
Writing & Preference Not comparable
Chatgpt 4o Latest 20250326: 62.6 (#72), GPT-5.1-Codex: —
| Benchmark | Chatgpt 4o Latest 20250326 | GPT-5.1-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-5.1-Codex?
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 38.6 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or GPT-5.1-Codex better for coding?
They score almost the same on coding (41.6 vs 41.9); test both on your own repository before choosing.
How many benchmarks do Chatgpt 4o Latest 20250326 and GPT-5.1-Codex share?
0 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GPT-5.1-Codex has 6.