Model comparison
Mercury vs Mercury 2
Mercury 2 is the stronger model overall, scoring 39.1 to 37.6 on the Noometry Index.
Last verified . 8 shared benchmarks.
Summary
- They share 8 benchmarks with published results for both. Mercury scores higher in 1 category and Mercury 2 in 5 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Mercury 2 leads 53.8 to 46.2.
Side by side
| Mercury | Mercury 2 | |
|---|---|---|
| Provider | Inception | Inception |
| Noometry Index | 37.6 | 39.1 |
| Released | — | 2026-02-20 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 50K |
| Input $ / M tokens | — | $0.25 |
| Output $ / M tokens | — | $0.75 |
| Results tracked | 9 | 17 |
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Category by category
Coding Mercury leads
Mercury: 38.7 (#170), Mercury 2: 33.5 (#255)
| Benchmark | Mercury | Mercury 2 |
|---|---|---|
| LMArena Coding | 1322 | 1391 |
| LMArena WebDev | — | 1171 |
| SciCode | — | 38.7% |
| WeirdML | — | 43.2% |
| ALE-Bench | — | 785.58 |
Reasoning Mercury 2 leads
Mercury: 17.5 (#293), Mercury 2: 23.8 (#170)
| Benchmark | Mercury | Mercury 2 |
|---|---|---|
| LMArena Hard Prompts | 1285 | 1362 |
| Kagi LLM Benchmark | 21.6% | — |
| CritPt | — | 0.8% |
Knowledge Not comparable
Mercury: —, Mercury 2: 36.2 (#172)
| Benchmark | Mercury | Mercury 2 |
|---|---|---|
| Vectara Hallucination Rate | — | 12.3% |
| LMArena Expert | — | 1358 |
Multilingual Mercury 2 leads
Mercury: 41.6 (#206), Mercury 2: 46.6 (#157)
| Benchmark | Mercury | Mercury 2 |
|---|---|---|
| LMArena Non-English | 1260 | 1331 |
| LMArena Chinese | — | 1417 |
| LMArena Russian | — | 1304 |
Instruction Following Mercury 2 leads
Mercury: 65.2 (#224), Mercury 2: 70.2 (#165)
| Benchmark | Mercury | Mercury 2 |
|---|---|---|
| LMArena Instruction Following | 1239 | 1329 |
Long Context Mercury 2 leads
Mercury: 38.4 (#198), Mercury 2: 40.5 (#154)
| Benchmark | Mercury | Mercury 2 |
|---|---|---|
| LMArena Longer Query | 1266 | 1330 |
Writing & Preference Mercury 2 leads
Mercury: 46.2 (#221), Mercury 2: 53.8 (#155)
| Benchmark | Mercury | Mercury 2 |
|---|---|---|
| LMArena Text | 1282 | 1355 |
| LMArena Creative Writing | 1191 | 1289 |
| LMArena Multi-Turn | 1282 | 1358 |
Frequently asked questions
Is Mercury better than Mercury 2?
Mercury 2 is the stronger model overall, scoring 39.1 to 37.6 on the Noometry Index.
Is Mercury or Mercury 2 better for coding?
Mercury scores higher on coding benchmarks: 38.7 versus 33.5 in the Noometry coding category.
How many benchmarks do Mercury and Mercury 2 share?
8 benchmarks have published results for both models. Mercury has 9 scored results on Noometry and Mercury 2 has 17.