Noometry

Model comparison

Claude Opus 5.5 vs Command R+

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 32.4 on the Noometry Index. Command R+ costs 1.8× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Last verified . 17 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Command R+ Cohere

32.4

Rank #257 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Claude Opus 5.5 scores higher in 8 categories and Command R+ in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 5.5 leads 80.2 to 9.2.
  • The biggest single-benchmark swing is LMCA: 68.2% for Claude Opus 5.5 and 5% for Command R+.
  • Command R+ is cheaper at $2.50 / $10 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.
  • Claude Opus 5.5 accepts more context: 1M tokens versus 128K.
  • Command R+ has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5Command R+
ProviderAnthropicCohere
Noometry Index68.632.4
Released2026-09-222024-08-30
WeightsProprietaryOpen
Context window1M128K
Max output128K4K
Input $ / M tokens$4$2.50
Output $ / M tokens$20$10
Results tracked4434

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), Command R+: 29.1 (#309)

BenchmarkClaude Opus 5.5Command R+
LMArena Coding15471187
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
BigCodeBench Instruct—33.8%
LiveBench Coding—19.1%
MirrorCode77.4%—
BigCodeBench Complete—41.9%
ALE-Bench2,147—
HumanEval+—56.7%
MBPP+—63.5%

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), Command R+: —

BenchmarkClaude Opus 5.5Command R+
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), Command R+: 9.2 (#344)

BenchmarkClaude Opus 5.5Command R+
LMArena Hard Prompts15351186
DTBench98.9%54.9%
LMCA68.2%5%
Epoch Capabilities Index167.33119.34
ARC-AGI-293.3%—
SimpleBench—17.4%
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
CritPt31.7%—
EBR-Bench71.4%—
LiveBench Reasoning—24.8%
Mystery Game Puzzles71%—
LiveBench Data Analysis—38.1%
LiveBench—31.8%

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), Command R+: 28.9 (#242)

BenchmarkClaude Opus 5.5Command R+
LMArena Math15061188
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LiveBench Math—21.3%
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), Command R+: 36.4 (#169)

BenchmarkClaude Opus 5.5Command R+
LMArena Expert15471174
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
Vectara Hallucination Rate—6.9%
MMLU—69.4%

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), Command R+: —

BenchmarkClaude Opus 5.5Command R+
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.1 (#2), Command R+: 38.6 (#227)

BenchmarkClaude Opus 5.5Command R+
LMArena Non-English15071216
LMArena Chinese15881226
LMArena French15141209
LMArena Russian15201227
LMArena Spanish15071189
LMArena German—1216
LMArena Japanese—1166
LMArena Korean—1138

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.0 (#3), Command R+: 60.0 (#254)

BenchmarkClaude Opus 5.5Command R+
LMArena Instruction Following15371197
LiveBench Instruction Following—57.6%

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.1 (#19), Command R+: 37.3 (#219)

BenchmarkClaude Opus 5.5Command R+
LMArena Longer Query15321230

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), Command R+: 43.5 (#228)

BenchmarkClaude Opus 5.5Command R+
LMArena Text15151229
LMArena Creative Writing15331235
LMArena Multi-Turn14991213
EQ-Bench Creative Writing2050—
LiveBench Language—29.7%

Frequently asked questions

Is Claude Opus 5.5 better than Command R+?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 32.4 on the Noometry Index. Command R+ costs 1.8× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 5.5 or Command R+?

Command R+ is cheaper. It lists at $2.50 per million input tokens and $10 per million output tokens; Claude Opus 5.5 lists at $4 and $20.

Is Claude Opus 5.5 or Command R+ better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 29.1 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 5.5 does, with 1M tokens against 128K.

How many benchmarks do Claude Opus 5.5 and Command R+ share?

17 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Command R+ has 34.

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