Model comparison
Claude Sonnet 5.5 vs Command R+
Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 32.0 on the Noometry Index.
Last verified . 0 shared benchmarks.
CohereSummary
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 26.6.
- Claude Sonnet 5.5 is cheaper at $2 / $10 per million input/output tokens, against $2.50 / $10 for Command R+.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 128K.
- Command R+ has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5.5 | Command R+ | |
|---|---|---|
| Provider | Anthropic | Cohere |
| Noometry Index | 60.5 | 32.0 |
| Released | 2026-09-28 | 2024-08-30 |
| Weights | Proprietary | Open |
| Context window | 1M | 128K |
| Max output | 128K | 4K |
| Input $ / M tokens | $2 | $2.50 |
| Output $ / M tokens | $10 | $10 |
| Results tracked | 16 | 34 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 65.5 (#6), Command R+: 28.6 (#304)
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| BigCodeBench Instruct | — | 33.8% |
| LiveBench Coding | — | 19.1% |
| LMArena Coding | — | 1187 |
| BigCodeBench Complete | — | 41.9% |
| ALE-Bench | 1,819 | — |
| HumanEval+ | — | 56.7% |
| MBPP+ | — | 63.5% |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 44.9 (#14), Command R+: —
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 52.4 (#29), Command R+: 8.9 (#341)
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| SimpleBench | — | 17.4% |
| CritPt | 31.4% | — |
| LiveBench Reasoning | — | 24.8% |
| LMArena Hard Prompts | — | 1186 |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 54.9% |
| LiveBench Data Analysis | — | 38.1% |
| LMCA | — | 5% |
| Epoch Capabilities Index | — | 119.28 |
| LiveBench | — | 31.8% |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 88.7 (#4), Command R+: 26.6 (#239)
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| LiveBench Math | — | 21.3% |
| LMArena Math | — | 1188 |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#11), Command R+: 35.9 (#165)
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
| Vectara Hallucination Rate | — | 6.9% |
| LMArena Expert | — | 1174 |
| MMLU | — | 69.4% |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), Command R+: —
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| Furniture Assembly | 75% | — |
Multilingual Not comparable
Claude Sonnet 5.5: —, Command R+: 38.8 (#222)
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| LMArena Non-English | — | 1216 |
| LMArena Chinese | — | 1226 |
| LMArena French | — | 1208 |
| LMArena German | — | 1216 |
| LMArena Japanese | — | 1166 |
| LMArena Korean | — | 1138 |
| LMArena Russian | — | 1227 |
| LMArena Spanish | — | 1189 |
Instruction Following Not comparable
Claude Sonnet 5.5: —, Command R+: 60.2 (#249)
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| LiveBench Instruction Following | — | 57.6% |
| LMArena Instruction Following | — | 1197 |
Long Context Not comparable
Claude Sonnet 5.5: —, Command R+: 37.3 (#214)
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| LMArena Longer Query | — | 1231 |
Writing & Preference Not comparable
Claude Sonnet 5.5: —, Command R+: 43.7 (#223)
| Benchmark | Claude Sonnet 5.5 | Command R+ |
|---|---|---|
| LMArena Text | — | 1229 |
| LMArena Creative Writing | — | 1235 |
| LMArena Multi-Turn | — | 1213 |
| LiveBench Language | — | 29.7% |
Frequently asked questions
Is Claude Sonnet 5.5 better than Command R+?
Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 32.0 on the Noometry Index.
Which is cheaper, Claude Sonnet 5.5 or Command R+?
Claude Sonnet 5.5 is cheaper. It lists at $2 per million input tokens and $10 per million output tokens; Command R+ lists at $2.50 and $10.
Is Claude Sonnet 5.5 or Command R+ better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 28.6 in the Noometry coding category.
Which has the bigger context window?
Claude Sonnet 5.5 does, with 1M tokens against 128K.
How many benchmarks do Claude Sonnet 5.5 and Command R+ share?
0 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Command R+ has 34.