Claude Opus 4.7 vs Muse Spark 1.2
Claude Opus 4.7 leads Muse Spark 1.2 on coding, 67.5 to 55.7 on the Vibe Coding Index, and Muse Spark 1.2 costs 5.9x less per output token ($4.25 vs $25.00 per million). Updated October 22, 2026; 66 benchmarks have a result for both.
Claude Opus 4.7 or Muse Spark 1.2: which to pick
Pick Claude Opus 4.7 for coding: it scores 67.5 on the Vibe Coding Index against 55.7 for Muse Spark 1.2, though on 4 benchmarks against 5.
Pick Muse Spark 1.2 for output tokens 5.9x cheaper ($4.25 vs $25.00 per million) and a lower cost per solved task ($0.64 against $2.95).
- Shared results
- 66
- Claude Opus 4.7 only
- 37
- Muse Spark 1.2 only
- 31
- Like-for-like categories
- 7 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
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
Claude Opus 4.7
Claude Opus 4.7 scores 67.5 against 55.7.
4 and 5 benchmarks behind the scores
Intelligence
AA Intelligence Index
Claude Opus 4.7
Claude Opus 4.7 leads, 40.7 against 39.6.
Same board, both measured
Agentic work
AA Agentic Index
Muse Spark 1.2
Muse Spark 1.2 leads, 43.2 against 38.6.
Same board, both measured
Reasoning
GPQA Diamond
No call
Only Claude Opus 4.7 has a GPQA Diamond result, 90.2%.
Directional only
Math
AIME
No call
Only Claude Opus 4.7 has a AIME result, 96.3%.
Directional only
Knowledge
MMLU Pro
Claude Opus 4.7
Claude Opus 4.7 leads, 89.9% against 88.3%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Muse Spark 1.2 has a Design Arena: websites result, 1312.
Directional only
Long documents
Listed context window
Muse Spark 1.2
Muse Spark 1.2 takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Muse Spark 1.2
Claude Opus 4.7 $0.018, Muse Spark 1.2 $0.0034 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Muse Spark 1.2
Claude Opus 4.7 $2.95, Muse Spark 1.2 $0.64.
Published attempt cost and pass rate
At a glance
- Coding index
- Claude Opus 4.7 67.5 from 4 benchmarks, Muse Spark 1.2 55.7 from 5 benchmarks.
- Widest category
- Agentic work, 6.4 points apart on average over 6 shared benchmarks.
- Widest single gap
- WeirdML: Claude Opus 4.7 76.4% against Muse Spark 1.2 60.3%, 16.1 points apart on a 0 to 100 scale.
- Output price
- Claude Opus 4.7 $25.00 against Muse Spark 1.2 $4.25 per million output tokens, 5.9x apart.
- Context window
- Claude Opus 4.7 takes 1M tokens, Muse Spark 1.2 1.05M.
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 4.7 | Bars | Muse Spark 1.2 | Ties |
|---|---|---|---|---|
| Coding | 8 | 4 | ||
| Intelligence | 2 | 0 | ||
| Agentic work | 2 | 4 | ||
| Reasoning | 6 | 3 | ||
| Math | 3 | 0 | ||
| Knowledge | 5 | 6 | ||
| General | 19 | 4 | ||
| All shared boards | 45 | 21 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index84
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | Leader |
|---|---|---|---|
| LiveBench coding | Not measured | 78.2% | Only Muse Spark 1.2 measured |
| LMArena WebDev | 1558 | 1534 | Claude Opus 4.7 |
| AA Coding Index | 73.6 | 72.2 | Claude Opus 4.7 |
| LiveCodeBench (Vals AI) | 85.1% | Not measured | Only Claude Opus 4.7 measured |
| SWE-bench Verified (Vals AI) | 82.0% | 86.6% | Muse Spark 1.2 |
| Terminal-Bench 4 (Vals AI) | Not measured | 6.1% | Only Muse Spark 1.2 measured |
| Vibe Code Bench (Vals AI) | 71.0% | 79.1% | Muse Spark 1.2 |
| Code migration (Vals AI) | 43.9% | 29.9% | Claude Opus 4.7 |
| ProgramBench (Vals AI) | 0.0% | 0.5% | Muse Spark 1.2 |
| IOI (Vals AI) | Not measured | 21.8% | Only Muse Spark 1.2 measured |
| Terminal-Bench 2.1 (Vals AI) | 68.5% | 69.7% | Muse Spark 1.2 |
| SkillsBench (Vals AI) | Not measured | 53.0% | Only Muse Spark 1.2 measured |
| CyberBench (Vals AI) | Not measured | 69.5% | Only Muse Spark 1.2 measured |
| SciCode | Not measured | 57.4% | Only Muse Spark 1.2 measured |
| Terminal-Bench Hard (Artificial Analysis run) | 54.5% | Not measured | Only Claude Opus 4.7 measured |
| Terminal-Bench | 80.2% | Not measured | Only Claude Opus 4.7 measured |
| FrontierCode | 38.5% | Not measured | Only Claude Opus 4.7 measured |
| FrontierSWE | Not measured | 12.0% | Only Muse Spark 1.2 measured |
| GSO-Bench | 44.1% | Not measured | Only Claude Opus 4.7 measured |
| WeirdML | 76.4% | 60.3% | Claude Opus 4.7 |
| MirrorCode | 31.1% | Not measured | Only Claude Opus 4.7 measured |
| LMArena Text: coding | 1519 | 1505 | Claude Opus 4.7 |
| LMArena Text: software and IT | 1516 | 1505 | Claude Opus 4.7 |
| LMArena WebDev: React | 1560 | 1526 | Claude Opus 4.7 |
| LMArena WebDev: HTML | 1554 | 1543 | Claude Opus 4.7 |
| LMArena WebDev: from an image | 1577 | Not measured | Only Claude Opus 4.7 measured |
| Neither model has a result on the other 13 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | Leader |
|---|---|---|---|
| AA Intelligence Index | 40.7 | 39.6 | Claude Opus 4.7 |
| Epoch Capabilities Index | 156.8 | 155.1 | Claude Opus 4.7 |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index24
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | Leader |
|---|---|---|---|
| AA Agentic Index | 38.6 | 43.2 | Muse Spark 1.2 |
| Design Arena: agents building web apps | Not measured | 1221 | Only Muse Spark 1.2 measured |
| Design Arena: agents building full-stack apps | Not measured | 1210 | Only Muse Spark 1.2 measured |
| Design Arena: agents building mobile apps | Not measured | 1181 | Only Muse Spark 1.2 measured |
| Design Arena: agents building Android apps | Not measured | 1222 | Only Muse Spark 1.2 measured |
| Design Arena: agents building games | Not measured | 1179 | Only Muse Spark 1.2 measured |
| Design Arena: HTML slides | Not measured | 1085 | Only Muse Spark 1.2 measured |
| Design Arena: PowerPoint slides | Not measured | 1172 | Only Muse Spark 1.2 measured |
| LiveBench research | Not measured | 67.7% | Only Muse Spark 1.2 measured |
| LiveBench browser | Not measured | 36.0% | Only Muse Spark 1.2 measured |
| LiveBench long agentic | Not measured | 21.3% | Only Muse Spark 1.2 measured |
| SREBench (Vals AI) | Not measured | 0.0% | Only Muse Spark 1.2 measured |
| Finance Agent (Vals AI) | 51.5% | 60.6% | Muse Spark 1.2 |
| Tax Agent Bench (Vals AI) | 23.7% | 32.8% | Muse Spark 1.2 |
| Legal Research Bench (Vals AI) | 38.5% | 43.8% | Muse Spark 1.2 |
| Excel Modeling Benchmark (Vals AI) | 63.7% | 57.0% | Claude Opus 4.7 |
| BioMysteryBench (Vals AI) | Not measured | 64.8% | Only Muse Spark 1.2 measured |
| τ²-Bench Telecom | 88.6% | Not measured | Only Claude Opus 4.7 measured |
| APEX-Agents | 49.2% | 45.4% | Claude Opus 4.7 |
| OSWorld 2.0 | 18.2% | Not measured | Only Claude Opus 4.7 measured |
| PostTrainBench | 28.6% | Not measured | Only Claude Opus 4.7 measured |
| Vending-Bench 2 | $10,937 | Not measured | Only Claude Opus 4.7 measured |
| LMArena Search | 1230 | Not measured | Only Claude Opus 4.7 measured |
| Neither model has a result on the other 18 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index63
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | Leader |
|---|---|---|---|
| GPQA Diamond | 90.2% | Not measured | Only Claude Opus 4.7 measured |
| LiveBench reasoning | Not measured | 90.0% | Only Muse Spark 1.2 measured |
| MMMU Pro (Vals AI) | 85.5% | 86.1% | Muse Spark 1.2 |
| GPQA Diamond (Artificial Analysis run) | 91.4% | 90.4% | Claude Opus 4.7 |
| Humanity's Last Exam (Artificial Analysis run) | 42.3% | 45.5% | Muse Spark 1.2 |
| GPQA Diamond (Epoch AI run) | 90.2% | Not measured | Only Claude Opus 4.7 measured |
| ARC-AGI | 93.5% | Not measured | Only Claude Opus 4.7 measured |
| ARC-AGI-2 | 75.8% | Not measured | Only Claude Opus 4.7 measured |
| SimpleBench | 61.7% | 74.5% | Muse Spark 1.2 |
| Chess puzzles | 41.0% | 27.0% | Claude Opus 4.7 |
| Mystery game puzzles | 28.0% | Not measured | Only Claude Opus 4.7 measured |
| EBR-bench | 19.0% | Not measured | Only Claude Opus 4.7 measured |
| LMArena Text: hard prompts | 1506 | 1489 | Claude Opus 4.7 |
| LMArena Text: expert | 1521 | 1475 | Claude Opus 4.7 |
| LMArena Text: hard prompts in English | 1508 | 1487 | Claude Opus 4.7 |
| LMArena Vision: diagrams | 1336 | 1317 | Claude Opus 4.7 |
| LMArena Vision: homework | 1337 | Not measured | Only Claude Opus 4.7 measured |
| Kagi LLM Benchmark | 80.7% | Not measured | Only Claude Opus 4.7 measured |
| Neither model has a result on the other 4 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index30
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | Leader |
|---|---|---|---|
| AIME | 96.3% | Not measured | Only Claude Opus 4.7 measured |
| OTIS Mock AIME | 97.8% | Not measured | Only Claude Opus 4.7 measured |
| FrontierMath, tiers 1 to 3 | 70.2% | Not measured | Only Claude Opus 4.7 measured |
| FrontierMath, tier 4 | 31.7% | Not measured | Only Claude Opus 4.7 measured |
| ProofBench | 54.0% | 43.0% | Claude Opus 4.7 |
| LMArena Text: math | 1498 | 1484 | Claude Opus 4.7 |
| LMArena Text: mathematical work | 1509 | 1480 | Claude Opus 4.7 |
| Neither model has a result on the other 6 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index56
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | Leader |
|---|---|---|---|
| MMLU Pro | 89.9% | 88.3% | Claude Opus 4.7 |
| LegalBench (Vals AI) | 85.3% | 85.3% | Muse Spark 1.2 |
| CaseLaw (Vals AI) | 68.4% | Not measured | Only Claude Opus 4.7 measured |
| CorpFin (Vals AI) | 66.1% | 70.9% | Muse Spark 1.2 |
| TaxEval (Vals AI) | 75.3% | 80.4% | Muse Spark 1.2 |
| MortgageTax (Vals AI) | 70.3% | 65.4% | Claude Opus 4.7 |
| MedCode (Vals AI) | 54.9% | 49.4% | Claude Opus 4.7 |
| SimpleQA Verified | 51.7% | 60.3% | Muse Spark 1.2 |
| LMArena Text: science | 1508 | 1500 | Claude Opus 4.7 |
| LMArena Text: medicine and healthcare | 1495 | 1496 | Muse Spark 1.2 |
| LMArena Text: legal and government | 1504 | 1517 | Muse Spark 1.2 |
| LMArena Text: business and finance | 1490 | 1484 | Claude Opus 4.7 |
| FACTS Benchmark Suite | 45.5% | Not measured | Only Claude Opus 4.7 measured |
| Neither model has a result on the other 5 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1312 | Only Muse Spark 1.2 measured |
| Design Arena: UI components | Not measured | 1298 | Only Muse Spark 1.2 measured |
| Design Arena: game dev | Not measured | 1301 | Only Muse Spark 1.2 measured |
| Design Arena: data viz | Not measured | 1334 | Only Muse Spark 1.2 measured |
| Design Arena: 3D | Not measured | 1301 | Only Muse Spark 1.2 measured |
| Design Arena: all code categories | Not measured | 1312 | Only Muse Spark 1.2 measured |
| Design Arena: SVG | Not measured | 1284 | Only Muse Spark 1.2 measured |
| Design Arena: ASCII art | Not measured | 1284 | Only Muse Spark 1.2 measured |
| LiveBench design | Not measured | 67.1% | Only Muse Spark 1.2 measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index194
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | Leader |
|---|---|---|---|
| LiveBench data analysis | Not measured | 76.5% | Only Muse Spark 1.2 measured |
| Public Benefits Bench (Vals AI) | Not measured | 68.5% | Only Muse Spark 1.2 measured |
| SAGE (Vals AI) | 56.1% | 47.7% | Claude Opus 4.7 |
| MedScribe (Vals AI) | 83.0% | 90.1% | Muse Spark 1.2 |
| Vals Multimodal Index | 67.4% | 69.8% | Muse Spark 1.2 |
| IFBench | 58.6% | Not measured | Only Claude Opus 4.7 measured |
| Long context reasoning (AA-LCR) | 78.7% | 79.0% | Muse Spark 1.2 |
| DTBench | 94.7% | 94.7% | Muse Spark 1.2 |
| LMCA | 52.2% | 48.4% | Claude Opus 4.7 |
| Furniture assembly | 33.3% | Not measured | Only Claude Opus 4.7 measured |
| ExploitBench | 26.5% | Not measured | Only Claude Opus 4.7 measured |
| LMArena Text | 1490 | 1482 | Claude Opus 4.7 |
| LMArena Text: instruction following | 1498 | 1462 | Claude Opus 4.7 |
| LMArena Text: creative writing | 1486 | 1436 | Claude Opus 4.7 |
| LMArena Vision | 1317 | 1304 | Claude Opus 4.7 |
| LMArena Text: English | 1496 | 1483 | Claude Opus 4.7 |
| LMArena Text: non-English | 1480 | 1476 | Claude Opus 4.7 |
| LMArena Text: Chinese | 1531 | 1509 | Claude Opus 4.7 |
| LMArena Text: German | 1495 | Not measured | Only Claude Opus 4.7 measured |
| LMArena Text: Japanese | 1474 | Not measured | Only Claude Opus 4.7 measured |
| LMArena Text: Korean | 1464 | 1462 | Claude Opus 4.7 |
| LMArena Text: French | 1503 | 1495 | Claude Opus 4.7 |
| LMArena Text: Spanish | 1494 | 1484 | Claude Opus 4.7 |
| LMArena Text: Russian | 1494 | 1483 | Claude Opus 4.7 |
| LMArena Text: Polish | 1489 | Not measured | Only Claude Opus 4.7 measured |
| LMArena Text: multi-turn | 1505 | 1502 | Claude Opus 4.7 |
| LMArena Text: longer queries | 1505 | 1473 | Claude Opus 4.7 |
| LMArena Text: writing and language | 1492 | 1453 | Claude Opus 4.7 |
| LMArena Text: entertainment and media | 1474 | 1443 | Claude Opus 4.7 |
| LMArena Vision: English | 1322 | 1291 | Claude Opus 4.7 |
| LMArena Vision: Chinese | 1371 | Not measured | Only Claude Opus 4.7 measured |
| LMArena Vision: reading text | 1327 | 1313 | Claude Opus 4.7 |
| LMArena Vision: humor | 1309 | Not measured | Only Claude Opus 4.7 measured |
| LMArena Vision: recognizing things | 1278 | Not measured | Only Claude Opus 4.7 measured |
| LMArena Vision: creative writing | 1326 | Not measured | Only Claude Opus 4.7 measured |
| LMArena Document | 1495 | Not measured | Only Claude Opus 4.7 measured |
| Neither model has a result on the other 10 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Opus 4.7 | Muse Spark 1.2 | 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
Muse Spark 1.2 costs less
Repository review
50K input + 3K output tokens
Muse Spark 1.2 costs less
Agent loop
200K input + 10K output tokens
Muse Spark 1.2 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 4.7 | Meta Muse Spark 1.2 |
|---|---|---|
| Maker | Anthropic | Meta |
| Weights | No public weights listed | No public weights listed |
| Released | April 16, 2026 | August 5, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $5.00 | $1.25 |
| Output $/Mtok | $25.00 | $4.25 |
| Coding index | 67.5 | 55.7 |
| Independent measurements behind it | 4 | 5 |
| Cost per solved task | $2.95 | $0.64 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Opus 4.7 better than Muse Spark 1.2 for coding?
Pick Claude Opus 4.7 for coding: it scores 67.5 on the Vibe Coding Index against 55.7 for Muse Spark 1.2, though on 4 benchmarks against 5. Pick Muse Spark 1.2 for output tokens 5.9x cheaper ($4.25 vs $25.00 per million) and a lower cost per solved task ($0.64 against $2.95).
Which is cheaper, Claude Opus 4.7 or Muse Spark 1.2?
Claude Opus 4.7 costs $5.00 per million input tokens and $25.00 per million output tokens; Muse Spark 1.2 costs $1.25 and $4.25. Per solved SWE-bench Verified task, Claude Opus 4.7 costs $2.95 and Muse Spark 1.2 $0.64.
Which has the bigger context window, Claude Opus 4.7 or Muse Spark 1.2?
Muse Spark 1.2, with 1.05M tokens against 1M.
How many benchmarks is the Claude Opus 4.7 vs Muse Spark 1.2 comparison based on?
66 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.7's coding index rests on 4 independent benchmarks and Muse Spark 1.2's on 5. Where only one model has a result, the page says so instead of naming a winner.