Model comparison
Claude 2.1 vs Mercury 2
Mercury 2 is the stronger model overall, scoring 39.1 to 25.2 on the Noometry Index.
Last verified . 1 shared benchmarks.
Summary
- They share 1 benchmark with published results for both. Claude 2.1 scores higher in 0 categories and Mercury 2 in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Mercury 2 leads 36.2 to 15.4.
- The biggest single-benchmark swing is WeirdML: 7.1% for Claude 2.1 and 43.2% for Mercury 2.
Side by side
| Claude 2.1 | Mercury 2 | |
|---|---|---|
| Provider | Anthropic | Inception |
| Noometry Index | 25.2 | 39.1 |
| Released | 2023-11-21 | 2026-02-20 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 50K |
| Input $ / M tokens | — | $0.25 |
| Output $ / M tokens | — | $0.75 |
| Results tracked | 7 | 17 |
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Category by category
Coding Mercury 2 leads
Claude 2.1: 26.2 (#327), Mercury 2: 33.5 (#255)
| Benchmark | Claude 2.1 | Mercury 2 |
|---|---|---|
| WeirdML | 7.1% | 43.2% |
| LMArena WebDev | — | 1171 |
| SciCode | — | 38.7% |
| LMArena Coding | — | 1391 |
| ALE-Bench | — | 785.58 |
Reasoning Mercury 2 leads
Claude 2.1: 21.4 (#221), Mercury 2: 23.8 (#170)
| Benchmark | Claude 2.1 | Mercury 2 |
|---|---|---|
| CritPt | — | 0.8% |
| LMArena Hard Prompts | — | 1362 |
| DTBench | 51% | — |
| Epoch Capabilities Index | 119.27 | — |
| ForecastBench | 54.2 | — |
Math Not comparable
Claude 2.1: 10.2 (#315), Mercury 2: —
| Benchmark | Claude 2.1 | Mercury 2 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | — |
Knowledge Mercury 2 leads
Claude 2.1: 15.4 (#292), Mercury 2: 36.2 (#172)
| Benchmark | Claude 2.1 | Mercury 2 |
|---|---|---|
| GPQA Diamond | 33% | — |
| Vectara Hallucination Rate | — | 12.3% |
| LMArena Expert | — | 1358 |
| MMLU | 73.5% | — |
Multilingual Not comparable
Claude 2.1: —, Mercury 2: 46.6 (#157)
| Benchmark | Claude 2.1 | Mercury 2 |
|---|---|---|
| LMArena Non-English | — | 1331 |
| LMArena Chinese | — | 1417 |
| LMArena Russian | — | 1304 |
Instruction Following Not comparable
Claude 2.1: —, Mercury 2: 70.2 (#165)
| Benchmark | Claude 2.1 | Mercury 2 |
|---|---|---|
| LMArena Instruction Following | — | 1329 |
Long Context Not comparable
Claude 2.1: —, Mercury 2: 40.5 (#154)
| Benchmark | Claude 2.1 | Mercury 2 |
|---|---|---|
| LMArena Longer Query | — | 1330 |
Writing & Preference Not comparable
Claude 2.1: —, Mercury 2: 53.8 (#155)
| Benchmark | Claude 2.1 | Mercury 2 |
|---|---|---|
| LMArena Text | — | 1355 |
| LMArena Creative Writing | — | 1289 |
| LMArena Multi-Turn | — | 1358 |
Frequently asked questions
Is Claude 2.1 better than Mercury 2?
Mercury 2 is the stronger model overall, scoring 39.1 to 25.2 on the Noometry Index.
Is Claude 2.1 or Mercury 2 better for coding?
Mercury 2 scores higher on coding benchmarks: 33.5 versus 26.2 in the Noometry coding category.
How many benchmarks do Claude 2.1 and Mercury 2 share?
1 benchmark has published results for both models. Claude 2.1 has 7 scored results on Noometry and Mercury 2 has 17.