Claude Opus 4.7 vs Grok 4.3
Updated October 21, 2026. 84 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick Claude Opus 4.7 for coding: it scores 51.1 on the Vibe Coding Index against 22.5 for Grok 4.3.
Pick Grok 4.3 when output tokens cost 10.0x less, or when a solved task costs $0.31 against $2.95.
- Shared results
- 84
- Claude Opus 4.7 only
- 17
- Grok 4.3 only
- 20
- 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, four public coding benchmarks
Claude Opus 4.7
Claude Opus 4.7 scores 51.1 against 22.5.
One benchmark behind each score
Intelligence
AA Intelligence Index
Claude Opus 4.7
Claude Opus 4.7 leads, 40.7 against 24.9.
Same board, both measured
Agentic work
AA Agentic Index
Claude Opus 4.7
Claude Opus 4.7 leads, 38.6 against 15.5.
Same board, both measured
Reasoning
GPQA Diamond
Grok 4.3
Grok 4.3 leads, 91.4% against 90.2%.
Same board, both measured
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 85.8%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Grok 4.3 has a Design Arena: websites result, 1196.
Directional only
Long documents
Listed context window
No call
Both take 1M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Grok 4.3
Claude Opus 4.7 $0.018, Grok 4.3 $0.0025 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Grok 4.3
Claude Opus 4.7 $2.95, Grok 4.3 $0.31.
Published attempt cost and pass rate
At a glance
- Coding index
- Claude Opus 4.7 51.1 from 1 benchmark, Grok 4.3 22.5 from 1 benchmark.
- Widest category
- Agentic work, 26.3 points apart on average over 8 shared benchmarks.
- Widest single gap
- Vending-Bench 2: Claude Opus 4.7 $10,937 against Grok 4.3 $35, 68.1 points apart on a 0 to 100 scale.
- Output price
- Claude Opus 4.7 $25.00 against Grok 4.3 $2.50 per million output tokens, 10.0x apart.
- Context window
- Both take 1M tokens.
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 | Grok 4.3 | Ties |
|---|---|---|---|---|
| Coding | 14 | 0 | 1 tie | |
| Intelligence | 1 | 0 | ||
| Agentic work | 7 | 1 | ||
| Reasoning | 10 | 1 | ||
| Math | 6 | 0 | ||
| Knowledge | 10 | 2 | ||
| General | 30 | 1 | ||
| All shared boards | 78 | 5 | 1 tie |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index140
| Benchmark | Claude Opus 4.7 | Grok 4.3 | Leader |
|---|---|---|---|
| LMArena WebDev | 1558 | 1358 | Claude Opus 4.7 |
| AA Coding Index | 73.6 | 42.2 | Claude Opus 4.7 |
| LiveCodeBench (Vals AI) | 85.1% | 84.5% | Claude Opus 4.7 |
| SWE-bench Verified (Vals AI) | 82.0% | 71.4% | Claude Opus 4.7 |
| Vibe Code Bench (Vals AI) | 71.0% | 19.4% | Claude Opus 4.7 |
| Code migration (Vals AI) | 43.9% | 6.8% | Claude Opus 4.7 |
| ProgramBench (Vals AI) | 0.0% | 0.0% | Tie |
| Terminal-Bench 2.1 (Vals AI) | 68.5% | 42.0% | Claude Opus 4.7 |
| SkillsBench (Vals AI) | Not measured | 40.6% | Only Grok 4.3 measured |
| SciCode | Not measured | 48.3% | Only Grok 4.3 measured |
| Terminal-Bench Hard (Artificial Analysis run) | 54.5% | 37.9% | Claude Opus 4.7 |
| Terminal-Bench | 80.2% | Not measured | Only Claude Opus 4.7 measured |
| FrontierCode | 38.5% | Not measured | Only Claude Opus 4.7 measured |
| GSO-Bench | 44.1% | Not measured | Only Claude Opus 4.7 measured |
| WeirdML | 76.4% | 49.9% | Claude Opus 4.7 |
| MirrorCode | 31.1% | Not measured | Only Claude Opus 4.7 measured |
| ALE-Bench | Not measured | 944.2 | Only Grok 4.3 measured |
| LMArena Text: coding | 1519 | 1415 | Claude Opus 4.7 |
| LMArena Text: software and IT | 1516 | 1416 | Claude Opus 4.7 |
| LMArena WebDev: React | 1560 | 1353 | Claude Opus 4.7 |
| LMArena WebDev: HTML | 1554 | 1367 | Claude Opus 4.7 |
| LMArena WebDev: from an image | 1577 | 1375 | Claude Opus 4.7 |
| Neither model has a result on the other 16 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Opus 4.7 | Grok 4.3 | Leader |
|---|---|---|---|
| AA Intelligence Index | 40.7 | 24.9 | Claude Opus 4.7 |
| Epoch Capabilities Index | 156.8 | Not measured | Only Claude Opus 4.7 measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index71
| Benchmark | Claude Opus 4.7 | Grok 4.3 | Leader |
|---|---|---|---|
| AA Agentic Index | 38.6 | 15.5 | Claude Opus 4.7 |
| Design Arena: agents building web apps | Not measured | 1126 | Only Grok 4.3 measured |
| Design Arena: agents building full-stack apps | Not measured | 1006 | Only Grok 4.3 measured |
| Design Arena: agents building mobile apps | Not measured | 1059 | Only Grok 4.3 measured |
| Design Arena: agents building Android apps | Not measured | 967 | Only Grok 4.3 measured |
| Design Arena: agents building Godot games | Not measured | 914 | Only Grok 4.3 measured |
| Design Arena: agents building games | Not measured | 1007 | Only Grok 4.3 measured |
| Design Arena: HTML slides | Not measured | 1008 | Only Grok 4.3 measured |
| Design Arena: PowerPoint slides | Not measured | 1012 | Only Grok 4.3 measured |
| Finance Agent (Vals AI) | 51.5% | 37.7% | Claude Opus 4.7 |
| Tax Agent Bench (Vals AI) | 23.7% | 6.2% | Claude Opus 4.7 |
| Legal Research Bench (Vals AI) | 38.5% | 15.4% | Claude Opus 4.7 |
| Excel Modeling Benchmark (Vals AI) | 63.7% | 18.4% | Claude Opus 4.7 |
| τ²-Bench Telecom | 88.6% | 97.7% | Grok 4.3 |
| APEX-Agents | 49.2% | Not measured | Only Claude Opus 4.7 measured |
| 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 | $35 | Claude Opus 4.7 |
| LMArena Search | 1230 | 1166 | Claude Opus 4.7 |
| Neither model has a result on the other 20 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index101
| Benchmark | Claude Opus 4.7 | Grok 4.3 | Leader |
|---|---|---|---|
| GPQA Diamond | 90.2% | 91.4% | Grok 4.3 |
| MMMU Pro (Vals AI) | 85.5% | 83.1% | Claude Opus 4.7 |
| GPQA Diamond (Artificial Analysis run) | 91.4% | 90.1% | Claude Opus 4.7 |
| Humanity's Last Exam (Artificial Analysis run) | 42.3% | 37.2% | Claude Opus 4.7 |
| GPQA Diamond (Epoch AI run) | 90.2% | 88.8% | Claude Opus 4.7 |
| 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% | Not measured | Only Claude Opus 4.7 measured |
| Chess puzzles | 41.0% | 18.0% | 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 | 1396 | Claude Opus 4.7 |
| LMArena Text: expert | 1521 | 1384 | Claude Opus 4.7 |
| LMArena Text: hard prompts in English | 1508 | 1402 | Claude Opus 4.7 |
| LMArena Vision: diagrams | 1336 | 1241 | Claude Opus 4.7 |
| LMArena Vision: homework | 1337 | 1241 | Claude Opus 4.7 |
| Neither model has a result on the other 5 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index60
| Benchmark | Claude Opus 4.7 | Grok 4.3 | Leader |
|---|---|---|---|
| AIME | 96.3% | Not measured | Only Claude Opus 4.7 measured |
| OTIS Mock AIME | 97.8% | 93.3% | Claude Opus 4.7 |
| FrontierMath, tiers 1 to 3 | 70.2% | 42.8% | Claude Opus 4.7 |
| FrontierMath, tier 4 | 31.7% | 14.6% | Claude Opus 4.7 |
| ProofBench | 54.0% | 11.0% | Claude Opus 4.7 |
| LMArena Text: math | 1498 | 1387 | Claude Opus 4.7 |
| LMArena Text: mathematical work | 1509 | 1396 | 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 index102
| Benchmark | Claude Opus 4.7 | Grok 4.3 | Leader |
|---|---|---|---|
| MMLU Pro | 89.9% | 85.8% | Claude Opus 4.7 |
| LegalBench (Vals AI) | 85.3% | 84.5% | Claude Opus 4.7 |
| CaseLaw (Vals AI) | 68.4% | 79.3% | Grok 4.3 |
| CorpFin (Vals AI) | 66.1% | 68.5% | Grok 4.3 |
| TaxEval (Vals AI) | 75.3% | 70.8% | Claude Opus 4.7 |
| MortgageTax (Vals AI) | 70.3% | 48.3% | Claude Opus 4.7 |
| MedCode (Vals AI) | 54.9% | 38.1% | Claude Opus 4.7 |
| SimpleQA Verified | 51.7% | 33.2% | Claude Opus 4.7 |
| LMArena Text: science | 1508 | 1399 | Claude Opus 4.7 |
| LMArena Text: medicine and healthcare | 1495 | 1384 | Claude Opus 4.7 |
| LMArena Text: legal and government | 1504 | 1386 | Claude Opus 4.7 |
| LMArena Text: business and finance | 1490 | 1381 | Claude Opus 4.7 |
| Neither model has a result on the other 5 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Claude Opus 4.7 | Grok 4.3 | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1196 | Only Grok 4.3 measured |
| Design Arena: UI components | Not measured | 1192 | Only Grok 4.3 measured |
| Design Arena: game dev | Not measured | 1174 | Only Grok 4.3 measured |
| Design Arena: data viz | Not measured | 1180 | Only Grok 4.3 measured |
| Design Arena: 3D | Not measured | 1125 | Only Grok 4.3 measured |
| Design Arena: all code categories | Not measured | 1187 | Only Grok 4.3 measured |
| Design Arena: SVG | Not measured | 1081 | Only Grok 4.3 measured |
| Design Arena: ASCII art | Not measured | 1125 | Only Grok 4.3 measured |
| Neither model has a result on the other 1 board here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index301
| Benchmark | Claude Opus 4.7 | Grok 4.3 | Leader |
|---|---|---|---|
| Public Benefits Bench (Vals AI) | Not measured | 51.7% | Only Grok 4.3 measured |
| SAGE (Vals AI) | 56.1% | 19.7% | Claude Opus 4.7 |
| MedScribe (Vals AI) | 83.0% | 74.4% | Claude Opus 4.7 |
| Vals Multimodal Index | 67.4% | 43.3% | Claude Opus 4.7 |
| IFBench | 58.6% | 83.3% | Grok 4.3 |
| Long context reasoning (AA-LCR) | 78.7% | 75.0% | Claude Opus 4.7 |
| DTBench | 94.7% | 90.7% | Claude Opus 4.7 |
| LMCA | 52.2% | 38.3% | 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 | 1397 | Claude Opus 4.7 |
| LMArena Text: instruction following | 1498 | 1366 | Claude Opus 4.7 |
| LMArena Text: creative writing | 1486 | 1380 | Claude Opus 4.7 |
| LMArena Vision | 1317 | 1229 | Claude Opus 4.7 |
| LMArena Text: English | 1496 | 1404 | Claude Opus 4.7 |
| LMArena Text: non-English | 1480 | 1385 | Claude Opus 4.7 |
| LMArena Text: Chinese | 1531 | 1422 | Claude Opus 4.7 |
| LMArena Text: German | 1495 | 1395 | Claude Opus 4.7 |
| LMArena Text: Japanese | 1474 | 1379 | Claude Opus 4.7 |
| LMArena Text: Korean | 1464 | 1354 | Claude Opus 4.7 |
| LMArena Text: French | 1503 | 1411 | Claude Opus 4.7 |
| LMArena Text: Spanish | 1494 | 1399 | Claude Opus 4.7 |
| LMArena Text: Russian | 1494 | 1399 | Claude Opus 4.7 |
| LMArena Text: Polish | 1489 | 1398 | Claude Opus 4.7 |
| LMArena Text: multi-turn | 1505 | 1406 | Claude Opus 4.7 |
| LMArena Text: longer queries | 1505 | 1393 | Claude Opus 4.7 |
| LMArena Text: writing and language | 1492 | 1385 | Claude Opus 4.7 |
| LMArena Text: entertainment and media | 1474 | 1370 | Claude Opus 4.7 |
| LMArena Vision: English | 1322 | 1235 | Claude Opus 4.7 |
| LMArena Vision: Chinese | 1371 | 1257 | Claude Opus 4.7 |
| LMArena Vision: reading text | 1327 | 1235 | Claude Opus 4.7 |
| LMArena Vision: humor | 1309 | 1222 | Claude Opus 4.7 |
| LMArena Vision: recognizing things | 1278 | 1217 | Claude Opus 4.7 |
| LMArena Vision: creative writing | 1326 | 1237 | Claude Opus 4.7 |
| LMArena Document | 1495 | Not measured | Only Claude Opus 4.7 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 4.7 | Grok 4.3 | 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 4.3 costs less
Repository review
50K input + 3K output tokens
Grok 4.3 costs less
Agent loop
200K input + 10K output tokens
Grok 4.3 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 | SpaceXAI Grok 4.3 |
|---|---|---|
| Maker | Anthropic | xAI |
| Weights | No public weights listed | No public weights listed |
| Released | April 16, 2026 | April 30, 2026 |
| Context window | 1M | 1M |
| Input $/Mtok | $5.00 | $1.25 |
| Output $/Mtok | $25.00 | $2.50 |
| Coding index | 51.1 | 22.5 |
| Independent measurements behind it | 1 | 1 |
| Cost per solved task | $2.95 | $0.31 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Opus 4.7 better than Grok 4.3 for coding?
Pick Claude Opus 4.7 for coding: it scores 51.1 on the Vibe Coding Index against 22.5 for Grok 4.3. Pick Grok 4.3 when output tokens cost 10.0x less, or when a solved task costs $0.31 against $2.95.
Which is cheaper, Claude Opus 4.7 or Grok 4.3?
Claude Opus 4.7 costs $5.00 per million input tokens and $25.00 per million output tokens; Grok 4.3 costs $1.25 and $2.50. Per solved SWE-bench Verified task, Claude Opus 4.7 costs $2.95 and Grok 4.3 $0.31.
Which has the bigger context window, Claude Opus 4.7 or Grok 4.3?
Neither: both take 1M tokens.
How many benchmarks is the Claude Opus 4.7 vs Grok 4.3 comparison based on?
84 benchmarks have a result for both models as of October 21, 2026. Claude Opus 4.7's coding index rests on 1 independent benchmark and Grok 4.3's on 1. Where only one model has a result, the page says so instead of naming a winner.