Model comparison
GPT-4.5 vs Mercury
GPT-4.5 and Mercury score almost the same on the Noometry Index (36.9 vs 37.3), so choose on price, context window or the category you care about most.
Last verified . 8 shared benchmarks.
Summary
- They share 8 benchmarks with published results for both. GPT-4.5 scores higher in 5 categories and Mercury in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where GPT-4.5 leads 52.7 to 41.7.
Side by side
| GPT-4.5 | Mercury | |
|---|---|---|
| Provider | OpenAI | Inception |
| Noometry Index | 36.9 | 37.3 |
| Released | 2025-02-27 | — |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 42 | 9 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-4.5 leads
GPT-4.5: 41.8 (#102), Mercury: 38.1 (#164)
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| LMArena Coding | 1397 | 1323 |
| Aider Polyglot | 44.9% | — |
| WeirdML | 39.4% | — |
| LiveBench Coding | 75.2% | — |
Agentic & Tool Use Not comparable
GPT-4.5: 27.6 (#92), Mercury: —
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| Cybench | 17.5% | — |
Reasoning Mercury leads
GPT-4.5: 14.1 (#320), Mercury: 16.8 (#288)
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| LMArena Hard Prompts | 1404 | 1284 |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 34.5% | — |
| Kagi LLM Benchmark | — | 21.6% |
| ARC-AGI-1 | 10.3% | — |
| EnigmaEval | 3.2% | — |
| LiveBench Reasoning | 71.1% | — |
| LiveBench Data Analysis | 64.3% | — |
| Epoch Capabilities Index | 136.74 | — |
| ForecastBench | 61.7 | — |
| LiveBench | 69% | — |
Math Not comparable
GPT-4.5: 31.0 (#200), Mercury: —
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| LiveBench Math | 69.3% | — |
| LMArena Math | 1412 | — |
| MATH Level 5 | 78.6% | — |
Knowledge Not comparable
GPT-4.5: 32.4 (#205), Mercury: —
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| GPQA Diamond | 68.7% | — |
| Humanity's Last Exam | 5.4% | — |
| Confabulations | 13.6% | — |
| LMArena Expert | 1394 | — |
Multimodal Not comparable
GPT-4.5: 37.0 (#68), Mercury: —
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| LMArena Vision | 1195 | — |
| VPCT | 45% | — |
Multilingual GPT-4.5 leads
GPT-4.5: 52.7 (#78), Mercury: 41.7 (#201)
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| LMArena Non-English | 1413 | 1259 |
| LMArena Chinese | 1421 | — |
| LMArena French | 1417 | — |
| LMArena German | 1457 | — |
| LMArena Japanese | 1416 | — |
| LMArena Korean | 1392 | — |
| LMArena Russian | 1419 | — |
Instruction Following GPT-4.5 leads
GPT-4.5: 72.8 (#129), Mercury: 65.3 (#220)
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| LMArena Instruction Following | 1404 | 1238 |
| LiveBench Instruction Following | 72.3% | — |
Long Context GPT-4.5 leads
GPT-4.5: 40.4 (#150), Mercury: 38.3 (#193)
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| LMArena Longer Query | 1406 | 1264 |
| Fiction.LiveBench | 63.9% | — |
Writing & Preference GPT-4.5 leads
GPT-4.5: 57.1 (#129), Mercury: 46.2 (#216)
| Benchmark | GPT-4.5 | Mercury |
|---|---|---|
| LMArena Text | 1417 | 1282 |
| LMArena Creative Writing | 1394 | 1186 |
| LMArena Multi-Turn | 1444 | 1283 |
| Short-Story Creative Writing | 75.6% | — |
| EQ-Bench Creative Writing | 1258 | — |
| LiveBench Language | 61.5% | — |
Frequently asked questions
Is GPT-4.5 better than Mercury?
GPT-4.5 and Mercury score almost the same on the Noometry Index (36.9 vs 37.3), so choose on price, context window or the category you care about most.
Is GPT-4.5 or Mercury better for coding?
GPT-4.5 scores higher on coding benchmarks: 41.8 versus 38.1 in the Noometry coding category.
How many benchmarks do GPT-4.5 and Mercury share?
8 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Mercury has 9.