Model comparison
Mercury 2.5 vs o1-mini
Mercury 2.5 and o1-mini score almost the same on the Noometry Index (33.5 vs 34.0), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where Mercury 2.5 leads 22.4 to 8.8.
Side by side
| Mercury 2.5 | o1-mini | |
|---|---|---|
| Provider | Inception | OpenAI |
| Noometry Index | 33.5 | 34.0 |
| Released | 2026-09-08 | 2024-09-12 |
| Weights | Proprietary | Proprietary |
| Context window | 260K | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.04 | — |
| Output $ / M tokens | $0.15 | — |
| Results tracked | 4 | 39 |
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Category by category
Coding Mercury 2.5 leads
Mercury 2.5: 39.5 (#156), o1-mini: 35.5 (#224)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| Aider Polyglot | — | 32.9% |
| SciCode | 38.5% | — |
| WeirdML | — | 36.3% |
| LiveBench Coding | — | 48% |
| LMArena Coding | — | 1362 |
| ALE-Bench | 301.65 | — |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |
Agentic & Tool Use Not comparable
Mercury 2.5: —, o1-mini: 24.6 (#118)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| Cybench | — | 10% |
Reasoning Mercury 2.5 leads
Mercury 2.5: 22.4 (#193), o1-mini: 8.8 (#346)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| ARC-AGI-2 | — | 0.8% |
| SimpleBench | — | 18.1% |
| ARC-AGI-1 | — | 14% |
| CritPt | 0% | — |
| LiveBench Reasoning | — | 72.3% |
| LMArena Hard Prompts | — | 1333 |
| LiveBench Data Analysis | — | 57.9% |
| Epoch Capabilities Index | — | 135.82 |
| LiveBench | — | 57.8% |
Math o1-mini leads
Mercury 2.5: 23.3 (#272), o1-mini: 35.4 (#186)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 46.9% |
| ProofBench | 3% | — |
| LiveBench Math | — | 62% |
| LMArena Math | — | 1358 |
| MATH Level 5 | — | 89.2% |
| FrontierMath (Feb 2025 set) | — | 1.7% |
Knowledge Not comparable
Mercury 2.5: —, o1-mini: 34.9 (#192)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| GPQA Diamond | — | 62.4% |
| Confabulations | — | 18.6% |
| LMArena Expert | — | 1316 |
Multilingual Not comparable
Mercury 2.5: —, o1-mini: 43.6 (#182)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| LMArena Non-English | — | 1289 |
| LMArena Chinese | — | 1314 |
| LMArena French | — | 1293 |
| LMArena German | — | 1278 |
| LMArena Japanese | — | 1245 |
| LMArena Korean | — | 1223 |
| LMArena Russian | — | 1283 |
| LMArena Spanish | — | 1303 |
Instruction Following Not comparable
Mercury 2.5: —, o1-mini: 66.7 (#206)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| LiveBench Instruction Following | — | 65.4% |
| LMArena Instruction Following | — | 1304 |
Long Context Not comparable
Mercury 2.5: —, o1-mini: 40.1 (#161)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| LMArena Longer Query | — | 1320 |
Writing & Preference Not comparable
Mercury 2.5: —, o1-mini: 48.4 (#202)
| Benchmark | Mercury 2.5 | o1-mini |
|---|---|---|
| LMArena Text | — | 1317 |
| LMArena Creative Writing | — | 1244 |
| Short-Story Creative Writing | — | 64.9% |
| LMArena Multi-Turn | — | 1314 |
| LiveBench Language | — | 40.9% |
Frequently asked questions
Is Mercury 2.5 better than o1-mini?
Mercury 2.5 and o1-mini score almost the same on the Noometry Index (33.5 vs 34.0), so choose on price, context window or the category you care about most.
Is Mercury 2.5 or o1-mini better for coding?
Mercury 2.5 scores higher on coding benchmarks: 39.5 versus 35.5 in the Noometry coding category.
How many benchmarks do Mercury 2.5 and o1-mini share?
0 benchmarks have published results for both models. Mercury 2.5 has 4 scored results on Noometry and o1-mini has 39.