Claude Opus 4.8 vs Command A
Updated October 21, 2026. 51 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Only Claude Opus 4.8 has a coding score, 65.0 on the Vibe Coding Index; Command A has none, so the two cannot be ranked on coding.
Command A has the edge where output tokens cost 2.5x less, and where the benchmark that matters is IFBench, where it leads.
- Shared results
- 51
- Claude Opus 4.8 only
- 75
- Command A only
- 9
- Like-for-like categories
- 7 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Claude Opus 4.8 has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
Claude Opus 4.8
Claude Opus 4.8 leads, 41.8 against 13.1.
Same board, both measured
Agentic work
AA Agentic Index
Claude Opus 4.8
Claude Opus 4.8 leads, 41.9 against 1.0.
Same board, both measured
Reasoning
GPQA Diamond
Claude Opus 4.8
Claude Opus 4.8 leads, 92.4% against 48.5%.
Same board, both measured
Math
AIME
No call
Only Command A has a AIME result, 13.3%.
Directional only
Knowledge
MMLU Pro
Claude Opus 4.8
Claude Opus 4.8 leads, 89.6% against 69.2%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Claude Opus 4.8 has a Design Arena: websites result, 1259.
Directional only
Long documents
Listed context window
Claude Opus 4.8
Claude Opus 4.8 takes 1M tokens against 256K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Command A
Claude Opus 4.8 $0.018, Command A $0.0075 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Claude Opus 4.8
Claude Opus 4.8 $2.17, Command A $2.69.
Published attempt cost and pass rate
At a glance
- Coding index
- Claude Opus 4.8 65.0 from 6 benchmarks, Command A not benchmarked.
- Widest category
- Coding, 41.9 points apart on average over 8 shared benchmarks.
- Widest single gap
- SWE-bench Verified (Vals AI): Claude Opus 4.8 88.6% against Command A 7.8%, 80.8 points apart on a 0 to 100 scale.
- Output price
- Claude Opus 4.8 $25.00 against Command A $10.00 per million output tokens, 2.5x apart.
- Context window
- Claude Opus 4.8 takes 1M tokens, Command A 256K.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | Claude Opus 4.8 | Bars | Command A | Ties |
|---|---|---|---|---|
| Coding | 8 | 0 | ||
| Intelligence | 1 | 0 | ||
| Agentic work | 3 | 0 | ||
| Reasoning | 6 | 0 | ||
| Math | 2 | 0 | ||
| Knowledge | 9 | 0 | ||
| General | 21 | 1 | ||
| All shared boards | 50 | 1 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index80
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| LiveBench coding | 77.3% | Not measured | Only Claude Opus 4.8 measured |
| LMArena WebDev | 1556 | Not measured | Only Claude Opus 4.8 measured |
| AA Coding Index | 74.3 | 27.8 | Claude Opus 4.8 |
| LiveCodeBench (Vals AI) | 87.8% | 35.1% | Claude Opus 4.8 |
| SWE-bench Verified (Vals AI) | 88.6% | 7.8% | Claude Opus 4.8 |
| Terminal-Bench 4 (Vals AI) | 23.2% | Not measured | Only Claude Opus 4.8 measured |
| Vibe Code Bench (Vals AI) | 82.7% | Not measured | Only Claude Opus 4.8 measured |
| Code migration (Vals AI) | 47.3% | Not measured | Only Claude Opus 4.8 measured |
| ProgramBench (Vals AI) | 1.0% | Not measured | Only Claude Opus 4.8 measured |
| Terminal-Bench 2.1 (Vals AI) | 71.9% | 17.6% | Claude Opus 4.8 |
| SkillsBench (Vals AI) | 59.2% | Not measured | Only Claude Opus 4.8 measured |
| LiveCodeBench (Artificial Analysis run) | Not measured | 28.7% | Only Command A measured |
| SciCode | 54.4% | 38.5% | Claude Opus 4.8 |
| Terminal-Bench Hard (Artificial Analysis run) | 58.3% | 25.0% | Claude Opus 4.8 |
| FrontierCode | 46.5% | Not measured | Only Claude Opus 4.8 measured |
| GSO-Bench | 47.1% | Not measured | Only Claude Opus 4.8 measured |
| WeirdML | 82.9% | Not measured | Only Claude Opus 4.8 measured |
| LMArena Text: coding | 1490 | 1330 | Claude Opus 4.8 |
| LMArena Text: software and IT | 1488 | 1336 | Claude Opus 4.8 |
| LMArena WebDev: React | 1557 | Not measured | Only Claude Opus 4.8 measured |
| LMArena WebDev: HTML | 1543 | Not measured | Only Claude Opus 4.8 measured |
| Neither model has a result on the other 17 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| AA Intelligence Index | 41.8 | 13.1 | Claude Opus 4.8 |
| Epoch Capabilities Index | 159.0 | Not measured | Only Claude Opus 4.8 measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index30
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| AA Agentic Index | 41.9 | 1.0 | Claude Opus 4.8 |
| Design Arena: agents building web apps | 1233 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: agents building full-stack apps | 1249 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: agents building mobile apps | 1223 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: agents building Android apps | 1238 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: agents building Godot games | 1231 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: agents building games | 1238 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: HTML slides | 1221 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: PowerPoint slides | 1227 | Not measured | Only Claude Opus 4.8 measured |
| LiveBench research | 81.8% | Not measured | Only Claude Opus 4.8 measured |
| LiveBench browser | 96.0% | Not measured | Only Claude Opus 4.8 measured |
| LiveBench long agentic | 48.3% | Not measured | Only Claude Opus 4.8 measured |
| Finance Agent (Vals AI) | 53.9% | 9.0% | Claude Opus 4.8 |
| Tax Agent Bench (Vals AI) | 30.0% | Not measured | Only Claude Opus 4.8 measured |
| Legal Research Bench (Vals AI) | 43.8% | Not measured | Only Claude Opus 4.8 measured |
| Excel Modeling Benchmark (Vals AI) | 69.4% | Not measured | Only Claude Opus 4.8 measured |
| Terminal-Bench-Science (Vals AI) | 4.3% | Not measured | Only Claude Opus 4.8 measured |
| Time Horizon Index (Vals AI) | 11.8% | Not measured | Only Claude Opus 4.8 measured |
| τ²-Bench Telecom | 94.4% | 80.7% | Claude Opus 4.8 |
| APEX-Agents | 48.9% | Not measured | Only Claude Opus 4.8 measured |
| Remote Labor Index | 8.3% | Not measured | Only Claude Opus 4.8 measured |
| OSWorld 2.0 | 20.6% | Not measured | Only Claude Opus 4.8 measured |
| DeepResearch Bench | 50.2% | Not measured | Only Claude Opus 4.8 measured |
| PostTrainBench | 33.8% | Not measured | Only Claude Opus 4.8 measured |
| Vending-Bench 2 | $5,787 | Not measured | Only Claude Opus 4.8 measured |
| LMArena Search | 1204 | Not measured | Only Claude Opus 4.8 measured |
| Neither model has a result on the other 13 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index60
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| GPQA Diamond | 92.4% | 48.5% | Claude Opus 4.8 |
| LiveBench reasoning | 89.2% | Not measured | Only Claude Opus 4.8 measured |
| MMMU Pro (Vals AI) | 86.6% | Not measured | Only Claude Opus 4.8 measured |
| GPQA Diamond (Artificial Analysis run) | 92.0% | 76.1% | Claude Opus 4.8 |
| Humanity's Last Exam (Artificial Analysis run) | 48.7% | 12.0% | Claude Opus 4.8 |
| GPQA Diamond (Epoch AI run) | 91.0% | Not measured | Only Claude Opus 4.8 measured |
| ARC-AGI | 92.5% | Not measured | Only Claude Opus 4.8 measured |
| ARC-AGI-2 | 72.1% | Not measured | Only Claude Opus 4.8 measured |
| SimpleBench | 64.8% | Not measured | Only Claude Opus 4.8 measured |
| Chess puzzles | 52.0% | Not measured | Only Claude Opus 4.8 measured |
| Mystery game puzzles | 36.0% | Not measured | Only Claude Opus 4.8 measured |
| EBR-bench | 28.6% | Not measured | Only Claude Opus 4.8 measured |
| LMArena Text: hard prompts | 1482 | 1326 | Claude Opus 4.8 |
| LMArena Text: expert | 1503 | 1296 | Claude Opus 4.8 |
| LMArena Text: hard prompts in English | 1487 | 1335 | Claude Opus 4.8 |
| LMArena Vision: diagrams | 1315 | Not measured | Only Claude Opus 4.8 measured |
| LMArena Vision: homework | 1337 | Not measured | Only Claude Opus 4.8 measured |
| Neither model has a result on the other 4 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| AIME | Not measured | 13.3% | Only Command A measured |
| MATH 500 (Vals AI) | Not measured | 76.2% | Only Command A measured |
| MGSM (Vals AI) | Not measured | 85.7% | Only Command A measured |
| AA Math Index | Not measured | 13.0 | Only Command A measured |
| AIME 2025 (Artificial Analysis run) | Not measured | 13.0% | Only Command A measured |
| OTIS Mock AIME | 98.3% | Not measured | Only Claude Opus 4.8 measured |
| FrontierMath, tiers 1 to 3 | 80.0% | Not measured | Only Claude Opus 4.8 measured |
| FrontierMath, tier 4 | 56.1% | Not measured | Only Claude Opus 4.8 measured |
| ProofBench | 69.0% | Not measured | Only Claude Opus 4.8 measured |
| LMArena Text: math | 1486 | 1300 | Claude Opus 4.8 |
| LMArena Text: mathematical work | 1497 | 1312 | Claude Opus 4.8 |
| Neither model has a result on the other 2 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index90
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| MMLU Pro | 89.6% | 69.2% | Claude Opus 4.8 |
| LegalBench (Vals AI) | 83.6% | 79.7% | Claude Opus 4.8 |
| CaseLaw (Vals AI) | Not measured | 64.5% | Only Command A measured |
| CorpFin (Vals AI) | 66.7% | 46.0% | Claude Opus 4.8 |
| TaxEval (Vals AI) | 75.6% | 61.4% | Claude Opus 4.8 |
| MortgageTax (Vals AI) | 69.9% | Not measured | Only Claude Opus 4.8 measured |
| MedQA (Vals AI) | Not measured | 80.5% | Only Command A measured |
| MedCode (Vals AI) | 53.2% | 19.7% | Claude Opus 4.8 |
| MMLU Pro (Artificial Analysis run) | Not measured | 71.2% | Only Command A measured |
| SimpleQA Verified | 53.0% | Not measured | Only Claude Opus 4.8 measured |
| LMArena Text: science | 1477 | 1339 | Claude Opus 4.8 |
| LMArena Text: medicine and healthcare | 1464 | 1334 | Claude Opus 4.8 |
| LMArena Text: legal and government | 1477 | 1348 | Claude Opus 4.8 |
| LMArena Text: business and finance | 1458 | 1315 | Claude Opus 4.8 |
| Neither model has a result on the other 3 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| Design Arena: websites | 1259 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: UI components | 1257 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: game dev | 1264 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: data viz | 1239 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: 3D | 1223 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: all code categories | 1255 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: SVG | 1194 | Not measured | Only Claude Opus 4.8 measured |
| Design Arena: ASCII art | 1276 | Not measured | Only Claude Opus 4.8 measured |
| LiveBench design | 78.8% | Not measured | Only Claude Opus 4.8 measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index211
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| LiveBench data analysis | 66.0% | Not measured | Only Claude Opus 4.8 measured |
| Public Benefits Bench (Vals AI) | 68.1% | Not measured | Only Claude Opus 4.8 measured |
| SAGE (Vals AI) | 54.8% | Not measured | Only Claude Opus 4.8 measured |
| MedScribe (Vals AI) | 85.8% | 55.7% | Claude Opus 4.8 |
| Vals Multimodal Index | 70.9% | Not measured | Only Claude Opus 4.8 measured |
| IFBench | 62.2% | 73.9% | Command A |
| Long context reasoning (AA-LCR) | 77.7% | 52.7% | Claude Opus 4.8 |
| DTBench | 94.9% | 61.3% | Claude Opus 4.8 |
| LMCA | 57.5% | 10.3% | Claude Opus 4.8 |
| Surface Evolver Bench | 87.5% | Not measured | Only Claude Opus 4.8 measured |
| Furniture assembly | 42.5% | Not measured | Only Claude Opus 4.8 measured |
| LMArena Text | 1461 | 1331 | Claude Opus 4.8 |
| LMArena Text: instruction following | 1476 | 1309 | Claude Opus 4.8 |
| LMArena Text: creative writing | 1454 | 1319 | Claude Opus 4.8 |
| LMArena Vision | 1294 | Not measured | Only Claude Opus 4.8 measured |
| LMArena Text: English | 1468 | 1344 | Claude Opus 4.8 |
| LMArena Text: non-English | 1450 | 1313 | Claude Opus 4.8 |
| LMArena Text: Chinese | 1506 | 1327 | Claude Opus 4.8 |
| LMArena Text: German | 1472 | 1342 | Claude Opus 4.8 |
| LMArena Text: Japanese | 1442 | 1285 | Claude Opus 4.8 |
| LMArena Text: Korean | 1431 | 1285 | Claude Opus 4.8 |
| LMArena Text: French | 1481 | 1351 | Claude Opus 4.8 |
| LMArena Text: Spanish | 1465 | 1347 | Claude Opus 4.8 |
| LMArena Text: Russian | 1474 | 1314 | Claude Opus 4.8 |
| LMArena Text: Polish | 1459 | 1324 | Claude Opus 4.8 |
| LMArena Text: multi-turn | 1476 | 1338 | Claude Opus 4.8 |
| LMArena Text: longer queries | 1483 | 1334 | Claude Opus 4.8 |
| LMArena Text: writing and language | 1461 | 1328 | Claude Opus 4.8 |
| LMArena Text: entertainment and media | 1440 | 1306 | Claude Opus 4.8 |
| LMArena Vision: English | 1293 | Not measured | Only Claude Opus 4.8 measured |
| LMArena Vision: Chinese | 1346 | Not measured | Only Claude Opus 4.8 measured |
| LMArena Vision: reading text | 1303 | Not measured | Only Claude Opus 4.8 measured |
| LMArena Vision: humor | 1282 | Not measured | Only Claude Opus 4.8 measured |
| LMArena Vision: creative writing | 1301 | Not measured | Only Claude Opus 4.8 measured |
| LMArena Document | 1475 | Not measured | Only Claude Opus 4.8 measured |
| Neither model has a result on the other 11 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Opus 4.8 | Command A | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Command A costs less
Repository review
50K input + 3K output tokens
Command A costs less
Agent loop
200K input + 10K output tokens
Command A costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Anthropic Claude Opus 4.8 | Cohere Command A |
|---|---|---|
| Maker | Anthropic | Cohere |
| Weights | No public weights listed | Open weights |
| Released | May 27, 2026 | March 13, 2025 |
| Context window | 1M | 256K |
| Input $/Mtok | $5.00 | $2.50 |
| Output $/Mtok | $25.00 | $10.00 |
| Coding index | 65.0 | Not benchmarked |
| Independent measurements behind it | 6 | 1 |
| Cost per solved task | $2.17 | $2.69 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Opus 4.8 better than Command A for coding?
Only Claude Opus 4.8 has a coding score, 65.0 on the Vibe Coding Index; Command A has none, so the two cannot be ranked on coding. Command A has the edge where output tokens cost 2.5x less, and where the benchmark that matters is IFBench, where it leads.
Which is cheaper, Claude Opus 4.8 or Command A?
Claude Opus 4.8 costs $5.00 per million input tokens and $25.00 per million output tokens; Command A costs $2.50 and $10.00. Per solved SWE-bench Verified task, Claude Opus 4.8 costs $2.17 and Command A $2.69.
Which has the bigger context window, Claude Opus 4.8 or Command A?
Claude Opus 4.8, with 1M tokens against 256K.
How many benchmarks is the Claude Opus 4.8 vs Command A comparison based on?
51 benchmarks have a result for both models as of October 21, 2026. Claude Opus 4.8's coding index rests on 6 independent benchmarks and Command A's on 1. Where only one model has a result, the page says so instead of naming a winner.