Grok 4.5 vs Muse Wonder
Updated October 21, 2026. 49 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick Grok 4.5 for coding: it scores 75.5 on the Vibe Coding Index against 64.5 for Muse Wonder.
Pick Muse Wonder when the context window is larger, 1.05M against 500K tokens, or when what matters is LMArena WebDev or Terminal-Bench 4 (Vals AI), where it leads.
- Shared results
- 49
- Grok 4.5 only
- 71
- Muse Wonder only
- 11
- Like-for-like categories
- 8 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, four public coding benchmarks
Grok 4.5
Grok 4.5 scores 75.5 against 64.5.
2 and 1 benchmarks behind the scores
Intelligence
AA Intelligence Index
No call
Only Grok 4.5 has a AA Intelligence Index result, 38.8.
Directional only
Agentic work
AA Agentic Index
No call
Only Grok 4.5 has a AA Agentic Index result, 41.2.
Directional only
Reasoning
GPQA Diamond
No call
Only Grok 4.5 has a GPQA Diamond result, 92.9%.
Directional only
Knowledge
MMLU Pro
No call
Only Grok 4.5 has a MMLU Pro result, 89.2%.
Directional only
Web design
Design Arena: websites
Muse Wonder
Muse Wonder leads, 1361 against 1281.
Same board, both measured
General
Vals Index
No call
Only Muse Wonder has a Vals Index result, 64.9%.
Directional only
Long documents
Listed context window
Muse Wonder
Muse Wonder takes 1.05M tokens against 500K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Grok 4.5
Grok 4.5 $0.0050, Muse Wonder $0.014 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Grok 4.5 has the number, $0.62.
Directional only
At a glance
- Coding index
- Grok 4.5 75.5 from 2 benchmarks, Muse Wonder 64.5 from 1 benchmark.
- Widest category
- Math, 20.9 points apart on average over 3 shared benchmarks.
- Widest single gap
- ProofBench: Grok 4.5 31.0% against Muse Wonder 84.0%, 53.0 points apart on a 0 to 100 scale.
- Output price
- Grok 4.5 $6.00 against Muse Wonder $20.00 per million output tokens, 3.3x apart.
- Context window
- Grok 4.5 takes 500K tokens, Muse Wonder 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 | Grok 4.5 | Bars | Muse Wonder | Ties |
|---|---|---|---|---|
| Coding | 0 | 11 | ||
| Intelligence | 0 | 1 | ||
| Agentic work | 0 | 5 | ||
| Reasoning | 0 | 4 | ||
| Math | 0 | 3 | ||
| Knowledge | 0 | 4 | ||
| Web design | 0 | 6 | ||
| General | 1 | 14 | ||
| All shared boards | 1 | 48 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index011
| Benchmark | Grok 4.5 | Muse Wonder | Leader |
|---|---|---|---|
| LiveBench coding | 94.3% | Not measured | Only Grok 4.5 measured |
| LMArena WebDev | 1553 | 1652 | Muse Wonder |
| AA Coding Index | 72.4 | Not measured | Only Grok 4.5 measured |
| LiveCodeBench (Vals AI) | 87.3% | Not measured | Only Grok 4.5 measured |
| SWE-bench Verified (Vals AI) | 86.6% | Not measured | Only Grok 4.5 measured |
| Terminal-Bench 4 (Vals AI) | 8.6% | 49.5% | Muse Wonder |
| Vibe Code Bench (Vals AI) | 69.0% | 83.1% | Muse Wonder |
| Code migration (Vals AI) | 36.6% | 62.5% | Muse Wonder |
| ProgramBench (Vals AI) | 0.0% | Not measured | Only Grok 4.5 measured |
| IOI (Vals AI) | 40.6% | 66.9% | Muse Wonder |
| Terminal-Bench 2.1 (Vals AI) | 67.8% | Not measured | Only Grok 4.5 measured |
| SWE-bench Multimodal (Vals AI) | Not measured | 45.6% | Only Muse Wonder measured |
| Vibe Code Bench 1-100 (Vals AI) | Not measured | 26.6% | Only Muse Wonder measured |
| SkillsBench (Vals AI) | 66.0% | Not measured | Only Grok 4.5 measured |
| CyberBench (Vals AI) | 71.0% | 80.4% | Muse Wonder |
| SciCode | 55.0% | 60.3% | Muse Wonder |
| FrontierCode | 42.4% | Not measured | Only Grok 4.5 measured |
| WeirdML | 46.4% | Not measured | Only Grok 4.5 measured |
| ALE-Bench | 1309.3 | Not measured | Only Grok 4.5 measured |
| LMArena Text: coding | 1474 | 1522 | Muse Wonder |
| LMArena Text: software and IT | 1471 | 1515 | Muse Wonder |
| LMArena WebDev: React | 1556 | 1641 | Muse Wonder |
| LMArena WebDev: HTML | 1567 | 1694 | Muse Wonder |
| LMArena WebDev: from an image | 1562 | Not measured | Only Grok 4.5 measured |
| Neither model has a result on the other 14 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Grok 4.5 | Muse Wonder | Leader |
|---|---|---|---|
| AA Intelligence Index | 38.8 | Not measured | Only Grok 4.5 measured |
| Epoch Capabilities Index | 154.1 | 161.8 | Muse Wonder |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index05
| Benchmark | Grok 4.5 | Muse Wonder | Leader |
|---|---|---|---|
| AA Agentic Index | 41.2 | Not measured | Only Grok 4.5 measured |
| Design Arena: agents building web apps | 1217 | Not measured | Only Grok 4.5 measured |
| Design Arena: agents building full-stack apps | 1249 | Not measured | Only Grok 4.5 measured |
| Design Arena: agents building mobile apps | 1221 | Not measured | Only Grok 4.5 measured |
| Design Arena: agents building Android apps | 1242 | Not measured | Only Grok 4.5 measured |
| Design Arena: agents building Godot games | 1229 | Not measured | Only Grok 4.5 measured |
| Design Arena: agents building games | 1235 | Not measured | Only Grok 4.5 measured |
| Design Arena: HTML slides | 1204 | Not measured | Only Grok 4.5 measured |
| Design Arena: PowerPoint slides | 1232 | Not measured | Only Grok 4.5 measured |
| Design Arena: spreadsheets | Not measured | 1236 | Only Muse Wonder measured |
| LiveBench research | 85.9% | Not measured | Only Grok 4.5 measured |
| LiveBench browser | 44.0% | Not measured | Only Grok 4.5 measured |
| LiveBench long agentic | 27.9% | Not measured | Only Grok 4.5 measured |
| SREBench (Vals AI) | 0.8% | Not measured | Only Grok 4.5 measured |
| Finance Agent (Vals AI) | 48.4% | 56.6% | Muse Wonder |
| Tax Agent Bench (Vals AI) | 24.9% | 36.3% | Muse Wonder |
| Legal Research Bench (Vals AI) | 38.0% | 50.5% | Muse Wonder |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 23.8% | Only Muse Wonder measured |
| Excel Modeling Benchmark (Vals AI) | 52.9% | 67.1% | Muse Wonder |
| BioMysteryBench (Vals AI) | Not measured | 67.0% | Only Muse Wonder measured |
| Terminal-Bench-Science (Vals AI) | Not measured | 22.9% | Only Muse Wonder measured |
| Vals Science Index | Not measured | 39.1% | Only Muse Wonder measured |
| Time Horizon Index (Vals AI) | 6.3% | Not measured | Only Grok 4.5 measured |
| CUA-bench (Vals AI) | Not measured | 7.2% | Only Muse Wonder measured |
| APEX-Agents | 56.2% | Not measured | Only Grok 4.5 measured |
| PostTrainBench | 23.4% | Not measured | Only Grok 4.5 measured |
| Vending-Bench 2 | $3,887 | $9,432 | Muse Wonder |
| LMArena Search | 1216 | Not measured | Only Grok 4.5 measured |
| Neither model has a result on the other 11 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | Grok 4.5 | Muse Wonder | Leader |
|---|---|---|---|
| GPQA Diamond | 92.9% | Not measured | Only Grok 4.5 measured |
| LiveBench reasoning | 87.2% | Not measured | Only Grok 4.5 measured |
| MysteryMechanism (Vals AI) | Not measured | 27.5% | Only Muse Wonder measured |
| MMMU Pro (Vals AI) | 61.8% | Not measured | Only Grok 4.5 measured |
| GPQA Diamond (Artificial Analysis run) | 93.1% | Not measured | Only Grok 4.5 measured |
| Humanity's Last Exam (Artificial Analysis run) | 42.7% | 50.1% | Muse Wonder |
| GPQA Diamond (Epoch AI run) | 93.4% | Not measured | Only Grok 4.5 measured |
| ARC-AGI | 87.2% | Not measured | Only Grok 4.5 measured |
| ARC-AGI-2 | 52.6% | Not measured | Only Grok 4.5 measured |
| SimpleBench | 70.0% | Not measured | Only Grok 4.5 measured |
| Chess puzzles | 35.0% | Not measured | Only Grok 4.5 measured |
| LMArena Text: hard prompts | 1462 | 1506 | Muse Wonder |
| LMArena Text: expert | 1465 | 1513 | Muse Wonder |
| LMArena Text: hard prompts in English | 1464 | 1506 | Muse Wonder |
| LMArena Vision: diagrams | 1304 | Not measured | Only Grok 4.5 measured |
| LMArena Vision: homework | 1295 | Not measured | Only Grok 4.5 measured |
| Neither model has a result on the other 5 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index03
| Benchmark | Grok 4.5 | Muse Wonder | Leader |
|---|---|---|---|
| OTIS Mock AIME | 97.8% | Not measured | Only Grok 4.5 measured |
| FrontierMath, tiers 1 to 3 | 57.2% | Not measured | Only Grok 4.5 measured |
| FrontierMath, tier 4 | 24.4% | Not measured | Only Grok 4.5 measured |
| ProofBench | 31.0% | 84.0% | Muse Wonder |
| LMArena Text: math | 1460 | 1486 | Muse Wonder |
| LMArena Text: mathematical work | 1482 | 1514 | Muse Wonder |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | Grok 4.5 | Muse Wonder | Leader |
|---|---|---|---|
| MMLU Pro | 89.2% | Not measured | Only Grok 4.5 measured |
| LegalBench (Vals AI) | 86.0% | Not measured | Only Grok 4.5 measured |
| CorpFin (Vals AI) | 67.4% | Not measured | Only Grok 4.5 measured |
| TaxEval (Vals AI) | 71.7% | Not measured | Only Grok 4.5 measured |
| MortgageTax (Vals AI) | 61.8% | Not measured | Only Grok 4.5 measured |
| MedCode (Vals AI) | 43.3% | Not measured | Only Grok 4.5 measured |
| SimpleQA Verified | 48.3% | Not measured | Only Grok 4.5 measured |
| LMArena Text: science | 1464 | 1506 | Muse Wonder |
| LMArena Text: medicine and healthcare | 1440 | 1512 | Muse Wonder |
| LMArena Text: legal and government | 1463 | 1505 | Muse Wonder |
| LMArena Text: business and finance | 1441 | 1483 | Muse Wonder |
| Neither model has a result on the other 6 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index06
| Benchmark | Grok 4.5 | Muse Wonder | Leader |
|---|---|---|---|
| Design Arena: websites | 1281 | 1361 | Muse Wonder |
| Design Arena: UI components | 1279 | 1371 | Muse Wonder |
| Design Arena: game dev | 1263 | 1380 | Muse Wonder |
| Design Arena: data viz | 1267 | 1330 | Muse Wonder |
| Design Arena: 3D | 1257 | 1425 | Muse Wonder |
| Design Arena: all code categories | 1276 | 1370 | Muse Wonder |
| Design Arena: SVG | 1215 | Not measured | Only Grok 4.5 measured |
| Design Arena: ASCII art | 1257 | Not measured | Only Grok 4.5 measured |
| LiveBench design | 78.1% | Not measured | Only Grok 4.5 measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index114
| Benchmark | Grok 4.5 | Muse Wonder | Leader |
|---|---|---|---|
| Vals Index | Not measured | 64.9% | Only Muse Wonder measured |
| LiveBench data analysis | 73.0% | Not measured | Only Grok 4.5 measured |
| Public Benefits Bench (Vals AI) | Not measured | 70.2% | Only Muse Wonder measured |
| SAGE (Vals AI) | 35.0% | Not measured | Only Grok 4.5 measured |
| MedScribe (Vals AI) | 86.9% | Not measured | Only Grok 4.5 measured |
| Vals Multimodal Index | 63.4% | Not measured | Only Grok 4.5 measured |
| Long context reasoning (AA-LCR) | 79.3% | 80.7% | Muse Wonder |
| DTBench | 96.5% | 95.2% | Grok 4.5 |
| LMCA | 45.2% | 56.8% | Muse Wonder |
| Surface Evolver Bench | 74.4% | Not measured | Only Grok 4.5 measured |
| Furniture assembly | 22.5% | Not measured | Only Grok 4.5 measured |
| LMArena Text | 1448 | 1502 | Muse Wonder |
| LMArena Text: instruction following | 1445 | 1491 | Muse Wonder |
| LMArena Text: creative writing | 1442 | 1491 | Muse Wonder |
| LMArena Vision | 1287 | Not measured | Only Grok 4.5 measured |
| LMArena Text: English | 1453 | 1507 | Muse Wonder |
| LMArena Text: non-English | 1440 | 1492 | Muse Wonder |
| LMArena Text: Chinese | 1495 | 1537 | Muse Wonder |
| LMArena Text: German | 1448 | Not measured | Only Grok 4.5 measured |
| LMArena Text: Japanese | 1430 | Not measured | Only Grok 4.5 measured |
| LMArena Text: Korean | 1406 | Not measured | Only Grok 4.5 measured |
| LMArena Text: French | 1457 | 1523 | Muse Wonder |
| LMArena Text: Spanish | 1451 | Not measured | Only Grok 4.5 measured |
| LMArena Text: Russian | 1449 | 1522 | Muse Wonder |
| LMArena Text: Polish | 1432 | Not measured | Only Grok 4.5 measured |
| LMArena Text: multi-turn | 1456 | 1510 | Muse Wonder |
| LMArena Text: longer queries | 1462 | 1493 | Muse Wonder |
| LMArena Text: writing and language | 1445 | 1496 | Muse Wonder |
| LMArena Text: entertainment and media | 1434 | 1482 | Muse Wonder |
| LMArena Vision: English | 1285 | Not measured | Only Grok 4.5 measured |
| LMArena Vision: Chinese | 1345 | Not measured | Only Grok 4.5 measured |
| LMArena Vision: reading text | 1293 | Not measured | Only Grok 4.5 measured |
| LMArena Vision: humor | 1276 | Not measured | Only Grok 4.5 measured |
| LMArena Vision: creative writing | 1293 | Not measured | Only Grok 4.5 measured |
| LMArena Document | 1452 | Not measured | Only Grok 4.5 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 | Grok 4.5 | Muse Wonder | 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
Grok 4.5 costs less
Repository review
50K input + 3K output tokens
Grok 4.5 costs less
Agent loop
200K input + 10K output tokens
Grok 4.5 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 | SpaceXAI Grok 4.5 | Meta Muse Wonder |
|---|---|---|
| Maker | xAI | Meta |
| Weights | No public weights listed | No public weights listed |
| Released | July 8, 2026 | October 12, 2026 |
| Context window | 500K | 1.05M |
| Input $/Mtok | $2.00 | $4.00 |
| Output $/Mtok | $6.00 | $20.00 |
| Coding index | 75.5 | 64.5 |
| Independent measurements behind it | 2 | 1 |
| Cost per solved task | $0.62 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Grok 4.5 better than Muse Wonder for coding?
Pick Grok 4.5 for coding: it scores 75.5 on the Vibe Coding Index against 64.5 for Muse Wonder. Pick Muse Wonder when the context window is larger, 1.05M against 500K tokens, or when what matters is LMArena WebDev or Terminal-Bench 4 (Vals AI), where it leads.
Which is cheaper, Grok 4.5 or Muse Wonder?
Grok 4.5 costs $2.00 per million input tokens and $6.00 per million output tokens; Muse Wonder costs $4.00 and $20.00. Cost per solved task is known for Grok 4.5 only.
Which has the bigger context window, Grok 4.5 or Muse Wonder?
Muse Wonder, with 1.05M tokens against 500K.
How many benchmarks is the Grok 4.5 vs Muse Wonder comparison based on?
49 benchmarks have a result for both models as of October 21, 2026. Grok 4.5's coding index rests on 2 independent benchmarks and Muse Wonder's on 1. Where only one model has a result, the page says so instead of naming a winner.