Model comparison
Command R+ vs Mercury 2.5
Mercury 2.5 is the stronger model overall, scoring 33.5 to 32.4 on the Noometry Index.
Last verified . 0 shared benchmarks.
CohereSummary
- The widest gap is in reasoning, where Mercury 2.5 leads 22.4 to 9.2.
- Mercury 2.5 is cheaper at $0.04 / $0.15 per million input/output tokens, against $2.50 / $10 for Command R+.
- Mercury 2.5 accepts more context: 260K tokens versus 128K.
- Command R+ has downloadable open weights; the other is API-only.
Side by side
| Command R+ | Mercury 2.5 | |
|---|---|---|
| Provider | Cohere | Inception |
| Noometry Index | 32.4 | 33.5 |
| Released | 2024-08-30 | 2026-09-08 |
| Weights | Open | Proprietary |
| Context window | 128K | 260K |
| Max output | 4K | 66K |
| Input $ / M tokens | $2.50 | $0.04 |
| Output $ / M tokens | $10 | $0.15 |
| Results tracked | 34 | 4 |
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Category by category
Coding Mercury 2.5 leads
Command R+: 29.1 (#309), Mercury 2.5: 39.5 (#156)
| Benchmark | Command R+ | Mercury 2.5 |
|---|---|---|
| SciCode | — | 38.5% |
| BigCodeBench Instruct | 33.8% | — |
| LiveBench Coding | 19.1% | — |
| LMArena Coding | 1187 | — |
| BigCodeBench Complete | 41.9% | — |
| ALE-Bench | — | 301.65 |
| HumanEval+ | 56.7% | — |
| MBPP+ | 63.5% | — |
Reasoning Mercury 2.5 leads
Command R+: 9.2 (#344), Mercury 2.5: 22.4 (#193)
| Benchmark | Command R+ | Mercury 2.5 |
|---|---|---|
| SimpleBench | 17.4% | — |
| CritPt | — | 0% |
| LiveBench Reasoning | 24.8% | — |
| LMArena Hard Prompts | 1186 | — |
| DTBench | 54.9% | — |
| LiveBench Data Analysis | 38.1% | — |
| LMCA | 5% | — |
| Epoch Capabilities Index | 119.34 | — |
| LiveBench | 31.8% | — |
Math Command R+ leads
Command R+: 28.9 (#242), Mercury 2.5: 23.3 (#272)
| Benchmark | Command R+ | Mercury 2.5 |
|---|---|---|
| ProofBench | — | 3% |
| LiveBench Math | 21.3% | — |
| LMArena Math | 1188 | — |
Knowledge Not comparable
Command R+: 36.4 (#169), Mercury 2.5: —
| Benchmark | Command R+ | Mercury 2.5 |
|---|---|---|
| Vectara Hallucination Rate | 6.9% | — |
| LMArena Expert | 1174 | — |
| MMLU | 69.4% | — |
Multilingual Not comparable
Command R+: 38.6 (#227), Mercury 2.5: —
| Benchmark | Command R+ | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1216 | — |
| LMArena Chinese | 1226 | — |
| LMArena French | 1209 | — |
| LMArena German | 1216 | — |
| LMArena Japanese | 1166 | — |
| LMArena Korean | 1138 | — |
| LMArena Russian | 1227 | — |
| LMArena Spanish | 1189 | — |
Instruction Following Not comparable
Command R+: 60.0 (#254), Mercury 2.5: —
| Benchmark | Command R+ | Mercury 2.5 |
|---|---|---|
| LiveBench Instruction Following | 57.6% | — |
| LMArena Instruction Following | 1197 | — |
Long Context Not comparable
Command R+: 37.3 (#219), Mercury 2.5: —
| Benchmark | Command R+ | Mercury 2.5 |
|---|---|---|
| LMArena Longer Query | 1230 | — |
Writing & Preference Not comparable
Command R+: 43.5 (#228), Mercury 2.5: —
| Benchmark | Command R+ | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1229 | — |
| LMArena Creative Writing | 1235 | — |
| LMArena Multi-Turn | 1213 | — |
| LiveBench Language | 29.7% | — |
Frequently asked questions
Is Command R+ better than Mercury 2.5?
Mercury 2.5 is the stronger model overall, scoring 33.5 to 32.4 on the Noometry Index.
Which is cheaper, Command R+ or Mercury 2.5?
Mercury 2.5 is cheaper. It lists at $0.04 per million input tokens and $0.15 per million output tokens; Command R+ lists at $2.50 and $10.
Is Command R+ or Mercury 2.5 better for coding?
Mercury 2.5 scores higher on coding benchmarks: 39.5 versus 29.1 in the Noometry coding category.
Which has the bigger context window?
Mercury 2.5 does, with 260K tokens against 128K.
How many benchmarks do Command R+ and Mercury 2.5 share?
0 benchmarks have published results for both models. Command R+ has 34 scored results on Noometry and Mercury 2.5 has 4.