Model comparison
Mercury 2 vs Nova 2.0 Pro Preview
Mercury 2 is the stronger model overall, scoring 39.1 to 33.4 on the Noometry Index.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. Mercury 2 scores higher in 1 category and Nova 2.0 Pro Preview in 1 category; 2 gaps are clear of the uncertainty.
- The widest gap is in coding, where Nova 2.0 Pro Preview leads 40.8 to 33.5.
Side by side
| Mercury 2 | Nova 2.0 Pro Preview | |
|---|---|---|
| Provider | Inception | Amazon |
| Noometry Index | 39.1 | 33.4 |
| Released | 2026-02-20 | 2025-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | — |
| Max output | 50K | — |
| Input $ / M tokens | $0.25 | — |
| Output $ / M tokens | $0.75 | — |
| Results tracked | 17 | 3 |
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Category by category
Coding Nova 2.0 Pro Preview leads
Mercury 2: 33.5 (#255), Nova 2.0 Pro Preview: 40.8 (#133)
| Benchmark | Mercury 2 | Nova 2.0 Pro Preview |
|---|---|---|
| SciCode | 38.7% | 42.7% |
| LMArena WebDev | 1171 | — |
| WeirdML | 43.2% | — |
| LMArena Coding | 1391 | — |
| ALE-Bench | 785.58 | — |
Agentic & Tool Use Not comparable
Mercury 2: —, Nova 2.0 Pro Preview: 21.9 (#136)
| Benchmark | Mercury 2 | Nova 2.0 Pro Preview |
|---|---|---|
| GDP.pdf | — | 2% |
Reasoning Mercury 2 leads
Mercury 2: 23.8 (#170), Nova 2.0 Pro Preview: 22.4 (#194)
| Benchmark | Mercury 2 | Nova 2.0 Pro Preview |
|---|---|---|
| CritPt | 0.8% | 0% |
| LMArena Hard Prompts | 1362 | — |
Knowledge Not comparable
Mercury 2: 36.2 (#172), Nova 2.0 Pro Preview: —
| Benchmark | Mercury 2 | Nova 2.0 Pro Preview |
|---|---|---|
| Vectara Hallucination Rate | 12.3% | — |
| LMArena Expert | 1358 | — |
Multilingual Not comparable
Mercury 2: 46.6 (#157), Nova 2.0 Pro Preview: —
| Benchmark | Mercury 2 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Non-English | 1331 | — |
| LMArena Chinese | 1417 | — |
| LMArena Russian | 1304 | — |
Instruction Following Not comparable
Mercury 2: 70.2 (#165), Nova 2.0 Pro Preview: —
| Benchmark | Mercury 2 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Instruction Following | 1329 | — |
Long Context Not comparable
Mercury 2: 40.5 (#154), Nova 2.0 Pro Preview: —
| Benchmark | Mercury 2 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Longer Query | 1330 | — |
Writing & Preference Not comparable
Mercury 2: 53.8 (#155), Nova 2.0 Pro Preview: —
| Benchmark | Mercury 2 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Text | 1355 | — |
| LMArena Creative Writing | 1289 | — |
| LMArena Multi-Turn | 1358 | — |
Frequently asked questions
Is Mercury 2 better than Nova 2.0 Pro Preview?
Mercury 2 is the stronger model overall, scoring 39.1 to 33.4 on the Noometry Index.
Is Mercury 2 or Nova 2.0 Pro Preview better for coding?
Nova 2.0 Pro Preview scores higher on coding benchmarks: 40.8 versus 33.5 in the Noometry coding category.
How many benchmarks do Mercury 2 and Nova 2.0 Pro Preview share?
2 benchmarks have published results for both models. Mercury 2 has 17 scored results on Noometry and Nova 2.0 Pro Preview has 3.