Model comparison
Mercury 2 vs o1-mini
Mercury 2 is the stronger model overall, scoring 39.1 to 34.0 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Mercury 2 scores higher in 6 categories and o1-mini in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Mercury 2 leads 23.8 to 8.8.
- The biggest single-benchmark swing is WeirdML: 43.2% for Mercury 2 and 36.3% for o1-mini.
Side by side
| Mercury 2 | o1-mini | |
|---|---|---|
| Provider | Inception | OpenAI |
| Noometry Index | 39.1 | 34.0 |
| Released | 2026-02-20 | 2024-09-12 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | — |
| Max output | 50K | — |
| Input $ / M tokens | $0.25 | — |
| Output $ / M tokens | $0.75 | — |
| Results tracked | 17 | 39 |
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Category by category
Coding o1-mini leads
Mercury 2: 33.5 (#255), o1-mini: 35.5 (#224)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| WeirdML | 43.2% | 36.3% |
| LMArena Coding | 1391 | 1362 |
| Aider Polyglot | — | 32.9% |
| LMArena WebDev | 1171 | — |
| SciCode | 38.7% | — |
| LiveBench Coding | — | 48% |
| ALE-Bench | 785.58 | — |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |
Agentic & Tool Use Not comparable
Mercury 2: —, o1-mini: 24.6 (#118)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| Cybench | — | 10% |
Reasoning Mercury 2 leads
Mercury 2: 23.8 (#170), o1-mini: 8.8 (#346)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| LMArena Hard Prompts | 1362 | 1333 |
| ARC-AGI-2 | — | 0.8% |
| SimpleBench | — | 18.1% |
| ARC-AGI-1 | — | 14% |
| CritPt | 0.8% | — |
| LiveBench Reasoning | — | 72.3% |
| LiveBench Data Analysis | — | 57.9% |
| Epoch Capabilities Index | — | 135.82 |
| LiveBench | — | 57.8% |
Math Not comparable
Mercury 2: —, o1-mini: 35.4 (#186)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 46.9% |
| LiveBench Math | — | 62% |
| LMArena Math | — | 1358 |
| MATH Level 5 | — | 89.2% |
| FrontierMath (Feb 2025 set) | — | 1.7% |
Knowledge Mercury 2 leads
Mercury 2: 36.2 (#172), o1-mini: 34.9 (#192)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| LMArena Expert | 1358 | 1316 |
| GPQA Diamond | — | 62.4% |
| Confabulations | — | 18.6% |
| Vectara Hallucination Rate | 12.3% | — |
Multilingual Mercury 2 leads
Mercury 2: 46.6 (#157), o1-mini: 43.6 (#182)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| LMArena Non-English | 1331 | 1289 |
| LMArena Chinese | 1417 | 1314 |
| LMArena Russian | 1304 | 1283 |
| LMArena French | — | 1293 |
| LMArena German | — | 1278 |
| LMArena Japanese | — | 1245 |
| LMArena Korean | — | 1223 |
| LMArena Spanish | — | 1303 |
Instruction Following Mercury 2 leads
Mercury 2: 70.2 (#165), o1-mini: 66.7 (#206)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| LMArena Instruction Following | 1329 | 1304 |
| LiveBench Instruction Following | — | 65.4% |
Long Context Too close to call
Mercury 2: 40.5 (#154), o1-mini: 40.1 (#161)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| LMArena Longer Query | 1330 | 1320 |
Writing & Preference Mercury 2 leads
Mercury 2: 53.8 (#155), o1-mini: 48.4 (#202)
| Benchmark | Mercury 2 | o1-mini |
|---|---|---|
| LMArena Text | 1355 | 1317 |
| LMArena Creative Writing | 1289 | 1244 |
| LMArena Multi-Turn | 1358 | 1314 |
| Short-Story Creative Writing | — | 64.9% |
| LiveBench Language | — | 40.9% |
Frequently asked questions
Is Mercury 2 better than o1-mini?
Mercury 2 is the stronger model overall, scoring 39.1 to 34.0 on the Noometry Index.
Is Mercury 2 or o1-mini better for coding?
o1-mini scores higher on coding benchmarks: 35.5 versus 33.5 in the Noometry coding category.
How many benchmarks do Mercury 2 and o1-mini share?
12 benchmarks have published results for both models. Mercury 2 has 17 scored results on Noometry and o1-mini has 39.