Model comparison
Claude Sonnet 5.5 vs Command A Plus
Claude Sonnet 5.5 has enough public results to be ranked (#10); 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 Sonnet 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 Sonnet 5.5 leads 52.4 to 21.7.
- The biggest single-benchmark swing is CritPt: 31.4% for Claude Sonnet 5.5 and 0.3% for Command A Plus.
- Claude Sonnet 5.5 is cheaper at $2 / $10 per million input/output tokens, against $2.50 / $10 for Command A Plus.
- Claude Sonnet 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 Sonnet 5.5 | Command A Plus | |
|---|---|---|
| Provider | Anthropic | Cohere |
| Noometry Index | 60.5 | 34.7 |
| Released | 2026-09-28 | 2026-05-20 |
| Weights | Proprietary | Open |
| Context window | 1M | 128K |
| Max output | 128K | 64K |
| Input $ / M tokens | $2 | $2.50 |
| Output $ / M tokens | $10 | $10 |
| Results tracked | 16 | 2 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 65.5 (#6), Command A Plus: 38.7
| Benchmark | Claude Sonnet 5.5 | Command A Plus |
|---|---|---|
| SciCode | 61% | 37.8% |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 44.9 (#14), Command A Plus: —
| Benchmark | Claude Sonnet 5.5 | Command A Plus |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 52.4 (#29), Command A Plus: 21.7
| Benchmark | Claude Sonnet 5.5 | Command A Plus |
|---|---|---|
| CritPt | 31.4% | 0.3% |
| Mystery Game Puzzles | 65% | — |
Math Not comparable
Claude Sonnet 5.5: 88.7 (#4), Command A Plus: —
| Benchmark | Claude Sonnet 5.5 | Command A Plus |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
Knowledge Not comparable
Claude Sonnet 5.5: 66.0 (#11), Command A Plus: —
| Benchmark | Claude Sonnet 5.5 | Command A Plus |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), Command A Plus: —
| Benchmark | Claude Sonnet 5.5 | Command A Plus |
|---|---|---|
| Furniture Assembly | 75% | — |
Frequently asked questions
Is Claude Sonnet 5.5 better than Command A Plus?
Claude Sonnet 5.5 has enough public results to be ranked (#10); Command A Plus does not yet, so treat this comparison as directional.
Which is cheaper, Claude Sonnet 5.5 or Command A Plus?
Claude Sonnet 5.5 is cheaper. It lists at $2 per million input tokens and $10 per million output tokens; Command A Plus lists at $2.50 and $10.
Is Claude Sonnet 5.5 or Command A Plus better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 38.7 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 A Plus share?
2 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Command A Plus has 2.