Model comparison
Claude Opus 5.5 vs Command A Plus
Claude Opus 5.5 has enough public results to be ranked (#3); Command A Plus does not yet, so treat this comparison as directional.
Last verified . 2 shared benchmarks.
CohereSummary
- They share 2 benchmarks with published results for both. Claude Opus 5.5 scores higher in 2 categories and Command A Plus in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Opus 5.5 leads 80.2 to 22.4.
- The biggest single-benchmark swing is CritPt: 31.7% for Claude Opus 5.5 and 0.3% for Command A Plus.
- Command A Plus 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 A Plus has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 5.5 | Command A Plus | |
|---|---|---|
| Provider | Anthropic | Cohere |
| Noometry Index | 68.6 | 35.3 |
| Released | 2026-09-22 | 2026-05-20 |
| Weights | Proprietary | Open |
| Context window | 1M | 128K |
| Max output | 128K | 64K |
| Input $ / M tokens | $4 | $2.50 |
| Output $ / M tokens | $20 | $10 |
| Results tracked | 44 | 2 |
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Category by category
Coding Claude Opus 5.5 leads
Claude Opus 5.5: 71.9 (#3), Command A Plus: 39.3
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| SciCode | 66.9% | 37.8% |
| FrontierCode | 54.6% | — |
| CursorBench | 57.8% | — |
| LMArena WebDev | 1813 | — |
| FrontierSWE | 62.3% | — |
| LMArena Coding | 1547 | — |
| MirrorCode | 77.4% | — |
| ALE-Bench | 2,147 | — |
Agentic & Tool Use Not comparable
Claude Opus 5.5: 45.3 (#15), Command A Plus: —
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| APEX-Agents | 73.5% | — |
| GDP.pdf | 30.6% | — |
| Vending-Bench 2 | 9,235 | — |
Reasoning Claude Opus 5.5 leads
Claude Opus 5.5: 80.2 (#3), Command A Plus: 22.4
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| CritPt | 31.7% | 0.3% |
| ARC-AGI-2 | 93.3% | — |
| NYT Connections (extended) | 88.5% | — |
| ARC-AGI-1 | 98.5% | — |
| EBR-Bench | 71.4% | — |
| LMArena Hard Prompts | 1535 | — |
| Mystery Game Puzzles | 71% | — |
| DTBench | 98.9% | — |
| LMCA | 68.2% | — |
| Epoch Capabilities Index | 167.33 | — |
Math Not comparable
Claude Opus 5.5: 91.8 (#3), Command A Plus: —
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| FrontierMath (Tiers 1-3) | 91.2% | — |
| FrontierMath Tier 4 | 95% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| LMArena Math | 1506 | — |
| FrontierMath Erdős | 2.9% | — |
Knowledge Not comparable
Claude Opus 5.5: 66.4 (#10), Command A Plus: —
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| GPQA Diamond | 90.6% | — |
| SimpleQA Verified | 72.2% | — |
| LMArena Expert | 1547 | — |
Multimodal Not comparable
Claude Opus 5.5: 57.8 (#1), Command A Plus: —
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| LMArena Vision | 1321 | — |
| Blueprint-Bench 2 | 51.2% | — |
| Furniture Assembly | 83.3% | — |
Multilingual Not comparable
Claude Opus 5.5: 59.1 (#2), Command A Plus: —
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| LMArena Non-English | 1507 | — |
| LMArena Chinese | 1588 | — |
| LMArena French | 1514 | — |
| LMArena Russian | 1520 | — |
| LMArena Spanish | 1507 | — |
Instruction Following Not comparable
Claude Opus 5.5: 80.0 (#3), Command A Plus: —
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| LMArena Instruction Following | 1537 | — |
Long Context Not comparable
Claude Opus 5.5: 47.1 (#19), Command A Plus: —
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| LMArena Longer Query | 1532 | — |
Writing & Preference Not comparable
Claude Opus 5.5: 78.2 (#3), Command A Plus: —
| Benchmark | Claude Opus 5.5 | Command A Plus |
|---|---|---|
| LMArena Text | 1515 | — |
| LMArena Creative Writing | 1533 | — |
| EQ-Bench Creative Writing | 2050 | — |
| LMArena Multi-Turn | 1499 | — |
Frequently asked questions
Is Claude Opus 5.5 better than Command A Plus?
Claude Opus 5.5 has enough public results to be ranked (#3); Command A Plus does not yet, so treat this comparison as directional.
Which is cheaper, Claude Opus 5.5 or Command A Plus?
Command A Plus 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 A Plus better for coding?
Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 39.3 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 A Plus share?
2 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Command A Plus has 2.