Model comparison
Chatgpt 4o Latest 20250326 vs Mercury 2.5
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 33.5 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 23.3.
Side by side
| Chatgpt 4o Latest 20250326 | Mercury 2.5 | |
|---|---|---|
| Provider | OpenAI | Inception |
| Noometry Index | 43.8 | 33.5 |
| Released | — | 2026-09-08 |
| Weights | Proprietary | Proprietary |
| Context window | — | 260K |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.04 |
| Output $ / M tokens | — | $0.15 |
| Results tracked | 21 | 4 |
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Category by category
Coding Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 41.6 (#122), Mercury 2.5: 39.5 (#156)
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| SciCode | — | 38.5% |
| LMArena Coding | 1413 | — |
| ALE-Bench | — | 301.65 |
Reasoning Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 33.8 (#71), Mercury 2.5: 22.4 (#193)
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| Kagi LLM Benchmark | 75% | — |
| CritPt | — | 0% |
| LMArena Hard Prompts | 1424 | — |
Math Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 38.6 (#134), Mercury 2.5: 23.3 (#272)
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| ProofBench | — | 3% |
| LMArena Math | 1407 | — |
Knowledge Not comparable
Chatgpt 4o Latest 20250326: 39.2 (#137), Mercury 2.5: —
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| Confabulations | 16.6% | — |
| LMArena Expert | 1401 | — |
Multimodal Not comparable
Chatgpt 4o Latest 20250326: 39.6 (#58), Mercury 2.5: —
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| LMArena Vision | 1243 | — |
Multilingual Not comparable
Chatgpt 4o Latest 20250326: 52.9 (#76), Mercury 2.5: —
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| 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), Mercury 2.5: —
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| LMArena Instruction Following | 1403 | — |
Long Context Not comparable
Chatgpt 4o Latest 20250326: 43.1 (#107), Mercury 2.5: —
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| LMArena Longer Query | 1413 | — |
Writing & Preference Not comparable
Chatgpt 4o Latest 20250326: 62.6 (#72), Mercury 2.5: —
| Benchmark | Chatgpt 4o Latest 20250326 | Mercury 2.5 |
|---|---|---|
| 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 Mercury 2.5?
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 33.5 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or Mercury 2.5 better for coding?
Chatgpt 4o Latest 20250326 scores higher on coding benchmarks: 41.6 versus 39.5 in the Noometry coding category.
How many benchmarks do Chatgpt 4o Latest 20250326 and Mercury 2.5 share?
0 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Mercury 2.5 has 4.