Model comparison
Command R vs Mercury 2
Mercury 2 is the stronger model overall, scoring 38.8 to 31.0 on the Noometry Index.
Last verified . 11 shared benchmarks.
CohereSummary
- They share 11 benchmarks with published results for both. Command R scores higher in 0 categories and Mercury 2 in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Mercury 2 leads 54.0 to 38.4.
- Command R is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.25 / $0.75 for Mercury 2.
- Command R has downloadable open weights; the other is API-only.
Side by side
| Command R | Mercury 2 | |
|---|---|---|
| Provider | Cohere | Inception |
| Noometry Index | 31.0 | 38.8 |
| Released | 2024-08-30 | 2026-02-20 |
| Weights | Open | Proprietary |
| Context window | 128K | 128K |
| Max output | 4K | 50K |
| Input $ / M tokens | $0.15 | $0.25 |
| Output $ / M tokens | $0.60 | $0.75 |
| Results tracked | 29 | 17 |
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Category by category
Coding Mercury 2 leads
Command R: 28.8 (#301), Mercury 2: 33.2 (#250)
| Benchmark | Command R | Mercury 2 |
|---|---|---|
| LMArena Coding | 1170 | 1391 |
| LMArena WebDev | — | 1170 |
| SciCode | — | 38.7% |
| WeirdML | — | 43.2% |
| BigCodeBench Instruct | 37.1% | — |
| LiveBench Coding | 17.9% | — |
| BigCodeBench Complete | 45.2% | — |
| ALE-Bench | — | 785.58 |
Reasoning Mercury 2 leads
Command R: 13.3 (#329), Mercury 2: 23.0 (#170)
| Benchmark | Command R | Mercury 2 |
|---|---|---|
| LMArena Hard Prompts | 1164 | 1362 |
| CritPt | — | 0.8% |
| LiveBench Reasoning | 21.9% | — |
| DTBench | 46.4% | — |
| LiveBench Data Analysis | 33.3% | — |
| LMCA | 9.2% | — |
| LiveBench | 27.5% | — |
Math Not comparable
Command R: 25.8 (#244), Mercury 2: —
| Benchmark | Command R | Mercury 2 |
|---|---|---|
| LiveBench Math | 19.4% | — |
| LMArena Math | 1155 | — |
Knowledge Mercury 2 leads
Command R: 30.5 (#219), Mercury 2: 35.6 (#170)
| Benchmark | Command R | Mercury 2 |
|---|---|---|
| LMArena Expert | 1138 | 1358 |
| Vectara Hallucination Rate | — | 12.3% |
| MMLU | 65.2% | — |
Multilingual Mercury 2 leads
Command R: 35.9 (#240), Mercury 2: 46.8 (#153)
| Benchmark | Command R | Mercury 2 |
|---|---|---|
| LMArena Non-English | 1174 | 1331 |
| LMArena Chinese | 1182 | 1416 |
| LMArena Russian | 1174 | 1303 |
| LMArena French | 1161 | — |
| LMArena German | 1176 | — |
| LMArena Japanese | 1143 | — |
| LMArena Korean | 1162 | — |
| LMArena Spanish | 1150 | — |
Instruction Following Mercury 2 leads
Command R: 58.3 (#256), Mercury 2: 70.4 (#161)
| Benchmark | Command R | Mercury 2 |
|---|---|---|
| LMArena Instruction Following | 1167 | 1328 |
| LiveBench Instruction Following | 55.6% | — |
Long Context Mercury 2 leads
Command R: 36.3 (#226), Mercury 2: 40.4 (#149)
| Benchmark | Command R | Mercury 2 |
|---|---|---|
| LMArena Longer Query | 1198 | 1329 |
Writing & Preference Mercury 2 leads
Command R: 38.4 (#248), Mercury 2: 54.0 (#151)
| Benchmark | Command R | Mercury 2 |
|---|---|---|
| LMArena Text | 1187 | 1355 |
| LMArena Creative Writing | 1170 | 1289 |
| LMArena Multi-Turn | 1163 | 1358 |
| LiveBench Language | 16.7% | — |
Frequently asked questions
Is Command R better than Mercury 2?
Mercury 2 is the stronger model overall, scoring 38.8 to 31.0 on the Noometry Index.
Which is cheaper, Command R or Mercury 2?
Command R is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Mercury 2 lists at $0.25 and $0.75.
Is Command R or Mercury 2 better for coding?
Mercury 2 scores higher on coding benchmarks: 33.2 versus 28.8 in the Noometry coding category.
Which has the bigger context window?
Both accept 128K tokens.
How many benchmarks do Command R and Mercury 2 share?
11 benchmarks have published results for both models. Command R has 29 scored results on Noometry and Mercury 2 has 17.