Claude Sonnet 5 vs Gemini 4 Carbon
Gemini 4 Carbon leads Claude Sonnet 5 on coding, 86.6 to 54.6 on the Vibe Coding Index, at about the same output price ($10.00 vs $10.00 per million). Updated November 14, 2026; 52 benchmarks have a result for both.
vs boards won of 52 shared
Claude Sonnet 5 or Gemini 4 Carbon: which to pick
Pick Gemini 4 Carbon for coding: it scores 86.6 on the Vibe Coding Index against 54.6 for Claude Sonnet 5, though on 4 benchmarks against 5.
Pick Claude Sonnet 5 for work measured by Long context reasoning (AA-LCR), where it leads.
Model AClaude Sonnet 5Anthropic54.6/1005 independent benchmarks$1.87 per solved taskModel BGemini 4 CarbonGoogle86.6/1004 independent benchmarksNo cost per solved task
- Shared results
- 52
- Claude Sonnet 5 only
- 74
- Gemini 4 Carbon only
- 21
- Like-for-like categories
- 8 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
Gemini 4 Carbon
Gemini 4 Carbon scores 86.6 against 54.6.
5 and 4 benchmarks behind the scores
Intelligence
AA Intelligence Index
No call
Only Gemini 4 Carbon has a AA Intelligence Index result, 60.0.
Directional only
Agentic work
AA Agentic Index
No call
Only Claude Sonnet 5 has a AA Agentic Index result, 43.6.
Directional only
Reasoning
GPQA Diamond
No call
Only Claude Sonnet 5 has a GPQA Diamond result, 88.9%.
Directional only
Knowledge
MMLU Pro
No call
Only Claude Sonnet 5 has a MMLU Pro result, 87.5%.
Directional only
Web design
Design Arena: websites
Gemini 4 Carbon
Gemini 4 Carbon leads, 1319 against 1268.
Same board, both measured
General
Vals Index
No call
Only Gemini 4 Carbon has a Vals Index result, 70.5%.
Directional only
Long documents
Listed context window
Gemini 4 Carbon
Gemini 4 Carbon takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
No call
Claude Sonnet 5 $0.0070, Gemini 4 Carbon $0.0070 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Claude Sonnet 5 has the number, $1.87.
Directional only
At a glance
- Coding index
- Claude Sonnet 5 54.6 from 5 benchmarks, Gemini 4 Carbon 86.6 from 4 benchmarks.
- Widest category
- Math, 26.4 points apart on average over 4 shared benchmarks.
- Widest single gap
- Terminal-Bench 4 (Vals AI): Claude Sonnet 5 10.6% against Gemini 4 Carbon 63.1%, 70.0 points apart on a 0 to 100 scale.
- Output price
- Both cost $10.00 per million output tokens.
- Context window
- Claude Sonnet 5 takes 1M tokens, Gemini 4 Carbon 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 Sonnet 5 | Bars | Gemini 4 Carbon | Ties |
|---|---|---|---|---|
| Coding | 0 | 11 | ||
| Intelligence | 0 | 1 | ||
| Agentic work | 0 | 6 | ||
| Reasoning | 0 | 7 | ||
| Math | 0 | 4 | ||
| Knowledge | 0 | 5 | ||
| Web design | 0 | 5 | ||
| General | 1 | 12 | ||
| All shared boards | 1 | 51 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index011
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | Leader |
|---|---|---|---|
| LiveBench coding | Not measured | 91.0% | Only Gemini 4 Carbon measured |
| LMArena WebDev | 1539 | 1768 | Gemini 4 Carbon |
| AA Coding Index | 71.5 | Not measured | Only Claude Sonnet 5 measured |
| LiveCodeBench (Vals AI) | 82.4% | Not measured | Only Claude Sonnet 5 measured |
| SWE-bench Verified (Vals AI) | 79.6% | Not measured | Only Claude Sonnet 5 measured |
| Terminal-Bench 4 (Vals AI) | 10.6% | 63.1% | Gemini 4 Carbon |
| Vibe Code Bench (Vals AI) | 81.3% | 89.1% | Gemini 4 Carbon |
| Code migration (Vals AI) | 44.4% | Not measured | Only Claude Sonnet 5 measured |
| ProgramBench (Vals AI) | 0.0% | Not measured | Only Claude Sonnet 5 measured |
| IOI (Vals AI) | 45.0% | Not measured | Only Claude Sonnet 5 measured |
| Terminal-Bench 2.1 (Vals AI) | 74.5% | Not measured | Only Claude Sonnet 5 measured |
| Vibe Code Bench 1-100 (Vals AI) | 13.8% | Not measured | Only Claude Sonnet 5 measured |
| SkillsBench (Vals AI) | 46.5% | Not measured | Only Claude Sonnet 5 measured |
| CyberBench (Vals AI) | 70.3% | Not measured | Only Claude Sonnet 5 measured |
| SciCode | 54.3% | Not measured | Only Claude Sonnet 5 measured |
| Terminal-Bench 4.0 (Artificial Analysis run) | 14.1% | 65.2% | Gemini 4 Carbon |
| FrontierCode 2.0 | 17.8% | 40.6% | Gemini 4 Carbon |
| FrontierCode | 42.7% | Not measured | Only Claude Sonnet 5 measured |
| FrontierSWE | Not measured | 61.2% | Only Gemini 4 Carbon measured |
| GSO-Bench | 37.3% | Not measured | Only Claude Sonnet 5 measured |
| WeirdML | 68.8% | Not measured | Only Claude Sonnet 5 measured |
| MirrorCode | 63.3% | Not measured | Only Claude Sonnet 5 measured |
| ALE-Bench | 1463.1 | 2374.7 | Gemini 4 Carbon |
| LMArena Text: coding | 1483 | 1564 | Gemini 4 Carbon |
| LMArena Text: software and IT | 1474 | 1552 | Gemini 4 Carbon |
| LMArena WebDev: React | 1539 | 1792 | Gemini 4 Carbon |
| LMArena WebDev: HTML | 1525 | 1770 | Gemini 4 Carbon |
| LMArena WebDev: from an image | 1539 | Not measured | Only Claude Sonnet 5 measured |
| SciCode | 10.7% | Not measured | Only Claude Sonnet 5 measured |
| SWE-Bench Pro V2 | 93.2% | Not measured | Only Claude Sonnet 5 measured |
| GameBench 2 | 54.4 | Not measured | Only Claude Sonnet 5 measured |
| Terminal-Bench 2.1 | 74.6% | Not measured | Only Claude Sonnet 5 measured |
| Terminal-Bench 3.0 | 14.6% | Not measured | Only Claude Sonnet 5 measured |
| Terminal-Bench 4.0 | 12.4% | Not measured | Only Claude Sonnet 5 measured |
| CursorBench 4.0 | 34.1% | 60.4% | Gemini 4 Carbon |
| Neither model has a result on the other 17 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 60.0 | Only Gemini 4 Carbon measured |
| Epoch Capabilities Index | 156.9 | 169.8 | Gemini 4 Carbon |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index06
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | Leader |
|---|---|---|---|
| AA Agentic Index | 43.6 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: agents building web apps | 1217 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: agents building full-stack apps | 1224 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: agents building mobile apps | 1202 | 1284 | Gemini 4 Carbon |
| Design Arena: agents building Android apps | 1212 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: agents building Godot games | 1202 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: agents building games | 1166 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: HTML slides | 1112 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: PowerPoint slides | 1180 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: spreadsheets | 1047 | 1224 | Gemini 4 Carbon |
| LiveBench research | Not measured | 92.5% | Only Gemini 4 Carbon measured |
| LiveBench browser | Not measured | 80.0% | Only Gemini 4 Carbon measured |
| LiveBench long agentic | Not measured | 72.7% | Only Gemini 4 Carbon measured |
| SREBench (Vals AI) | 0.4% | Not measured | Only Claude Sonnet 5 measured |
| Finance Agent (Vals AI) | 53.9% | Not measured | Only Claude Sonnet 5 measured |
| Tax Agent Bench (Vals AI) | 29.4% | 51.8% | Gemini 4 Carbon |
| Legal Research Bench (Vals AI) | 41.8% | 55.8% | Gemini 4 Carbon |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 17.5% | Only Gemini 4 Carbon measured |
| Excel Modeling Benchmark (Vals AI) | 66.3% | Not measured | Only Claude Sonnet 5 measured |
| Terminal-Bench-Science (Vals AI) | 5.7% | Not measured | Only Claude Sonnet 5 measured |
| APEX-Agents | 54.5% | 84.2% | Gemini 4 Carbon |
| Vending-Bench 2 | $6,378 | $16,484 | Gemini 4 Carbon |
| LMArena Search | 1188 | Not measured | Only Claude Sonnet 5 measured |
| Toolathlon-Verified | 71.6% | Not measured | Only Claude Sonnet 5 measured |
| Neither model has a result on the other 20 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index07
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | Leader |
|---|---|---|---|
| GPQA Diamond | 88.9% | Not measured | Only Claude Sonnet 5 measured |
| LiveBench reasoning | Not measured | 90.6% | Only Gemini 4 Carbon measured |
| MMMU Pro (Vals AI) | 83.0% | Not measured | Only Claude Sonnet 5 measured |
| GPQA Diamond (Artificial Analysis run) | 91.1% | Not measured | Only Claude Sonnet 5 measured |
| Humanity's Last Exam (Artificial Analysis run) | 41.3% | Not measured | Only Claude Sonnet 5 measured |
| HLE-Diamond (Artificial Analysis run) | Not measured | 69.1% | Only Gemini 4 Carbon measured |
| CritPt v2, hard subset (Artificial Analysis run) | Not measured | 69.0% | Only Gemini 4 Carbon measured |
| GPQA Diamond (Epoch AI run) | 90.5% | 96.5% | Gemini 4 Carbon |
| ARC-AGI | Not measured | 98.5% | Only Gemini 4 Carbon measured |
| ARC-AGI-2 | Not measured | 94.2% | Only Gemini 4 Carbon measured |
| SimpleBench | 60.6% | 92.6% | Gemini 4 Carbon |
| Chess puzzles | 45.0% | 78.0% | Gemini 4 Carbon |
| Mystery game puzzles | 35.0% | 73.0% | Gemini 4 Carbon |
| EBR-bench | Not measured | 87.6% | Only Gemini 4 Carbon measured |
| LMArena Text: hard prompts | 1461 | 1551 | Gemini 4 Carbon |
| LMArena Text: expert | 1488 | 1582 | Gemini 4 Carbon |
| LMArena Text: hard prompts in English | 1465 | 1545 | Gemini 4 Carbon |
| LMArena Vision: diagrams | 1292 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Vision: homework | 1310 | Not measured | Only Claude Sonnet 5 measured |
| Neither model has a result on the other 7 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | Leader |
|---|---|---|---|
| OTIS Mock AIME | 94.7% | 100.0% | Gemini 4 Carbon |
| FrontierMath, tiers 1 to 3 | 65.6% | 90.5% | Gemini 4 Carbon |
| FrontierMath, tier 4 | 29.3% | 95.1% | Gemini 4 Carbon |
| ProofBench | 77.0% | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: math | 1467 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: mathematical work | 1479 | 1538 | Gemini 4 Carbon |
| MathArena | Not measured | 85.4% | Only Gemini 4 Carbon measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index05
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | Leader |
|---|---|---|---|
| MMLU Pro | 87.5% | Not measured | Only Claude Sonnet 5 measured |
| LegalBench (Vals AI) | 83.9% | Not measured | Only Claude Sonnet 5 measured |
| CorpFin (Vals AI) | 67.0% | Not measured | Only Claude Sonnet 5 measured |
| TaxEval (Vals AI) | 75.6% | Not measured | Only Claude Sonnet 5 measured |
| MortgageTax (Vals AI) | 70.0% | Not measured | Only Claude Sonnet 5 measured |
| MedCode (Vals AI) | 47.5% | Not measured | Only Claude Sonnet 5 measured |
| AA-Omniscience | Not measured | 53.5 | Only Gemini 4 Carbon measured |
| SimpleQA Verified | 33.7% | 77.7% | Gemini 4 Carbon |
| GeoBench | 74.0% | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: science | 1460 | 1535 | Gemini 4 Carbon |
| LMArena Text: medicine and healthcare | 1443 | 1525 | Gemini 4 Carbon |
| LMArena Text: legal and government | 1451 | 1542 | Gemini 4 Carbon |
| LMArena Text: business and finance | 1437 | 1520 | Gemini 4 Carbon |
| FACTS Benchmark Suite | Not measured | 78.4% | Only Gemini 4 Carbon measured |
| PRBench Legal | Not measured | 53.3% | Only Gemini 4 Carbon measured |
| Neither model has a result on the other 6 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index05
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | Leader |
|---|---|---|---|
| Design Arena: websites | 1268 | 1319 | Gemini 4 Carbon |
| Design Arena: UI components | 1267 | 1357 | Gemini 4 Carbon |
| Design Arena: game dev | 1271 | 1326 | Gemini 4 Carbon |
| Design Arena: data viz | 1247 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: 3D | 1236 | 1434 | Gemini 4 Carbon |
| Design Arena: all code categories | 1267 | 1348 | Gemini 4 Carbon |
| Design Arena: SVG | 1184 | Not measured | Only Claude Sonnet 5 measured |
| Design Arena: ASCII art | 1199 | Not measured | Only Claude Sonnet 5 measured |
| LiveBench design | Not measured | 80.2% | Only Gemini 4 Carbon measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index112
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | Leader |
|---|---|---|---|
| Vals Index | Not measured | 70.5% | Only Gemini 4 Carbon measured |
| LiveBench data analysis | Not measured | 86.5% | Only Gemini 4 Carbon measured |
| Public Benefits Bench (Vals AI) | 66.0% | Not measured | Only Claude Sonnet 5 measured |
| MedScribe (Vals AI) | 76.0% | Not measured | Only Claude Sonnet 5 measured |
| Vals Multimodal Index | 68.8% | Not measured | Only Claude Sonnet 5 measured |
| Long context reasoning (AA-LCR) | 82.0% | 79.3% | Claude Sonnet 5 |
| GDPval-AA | 1470 | 1733 | Gemini 4 Carbon |
| DTBench | 92.5% | Not measured | Only Claude Sonnet 5 measured |
| LMCA | 50.0% | Not measured | Only Claude Sonnet 5 measured |
| Surface Evolver Bench | 60.0% | Not measured | Only Claude Sonnet 5 measured |
| Furniture assembly | Not measured | 77.5% | Only Gemini 4 Carbon measured |
| LMArena Text | 1442 | 1538 | Gemini 4 Carbon |
| LMArena Text: instruction following | 1453 | 1539 | Gemini 4 Carbon |
| LMArena Text: creative writing | 1414 | 1533 | Gemini 4 Carbon |
| LMArena Vision | 1272 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: English | 1450 | 1530 | Gemini 4 Carbon |
| LMArena Text: non-English | 1431 | 1534 | Gemini 4 Carbon |
| LMArena Text: Chinese | 1477 | 1613 | Gemini 4 Carbon |
| LMArena Text: German | 1441 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: Japanese | 1420 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: Korean | 1400 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: French | 1463 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: Spanish | 1441 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: Russian | 1448 | 1560 | Gemini 4 Carbon |
| LMArena Text: Polish | 1428 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Text: multi-turn | 1454 | 1569 | Gemini 4 Carbon |
| LMArena Text: longer queries | 1462 | 1549 | Gemini 4 Carbon |
| LMArena Text: writing and language | 1435 | 1542 | Gemini 4 Carbon |
| LMArena Text: entertainment and media | 1411 | 1527 | Gemini 4 Carbon |
| LMArena Vision: English | 1273 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Vision: Chinese | 1334 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Vision: reading text | 1286 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Vision: humor | 1257 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Vision: creative writing | 1247 | Not measured | Only Claude Sonnet 5 measured |
| LMArena Document | 1460 | Not measured | Only Claude Sonnet 5 measured |
| EQ-Bench 4 | 1221 | Not measured | Only Claude Sonnet 5 measured |
| Neither model has a result on the other 13 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Sonnet 5 | Gemini 4 Carbon | 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
Claude Sonnet 5$0.0070Fits in one request
Gemini 4 Carbon$0.0070Fits in one request
Same cost
Repository review
50K input + 3K output tokens
Claude Sonnet 5$0.130Fits in one request
Gemini 4 Carbon$0.130Fits in one request
Same cost
Agent loop
200K input + 10K output tokens
Claude Sonnet 5$0.500Fits in one request
Gemini 4 Carbon$0.500Fits in one request
Same cost
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 Sonnet 5 | Google Gemini 4 Carbon |
|---|---|---|
| Maker | Anthropic | |
| Weights | No public weights listed | No public weights listed |
| Released | June 30, 2026 | November 10, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $2.00 | $2.00 |
| Output $/Mtok | $10.00 | $10.00 |
| Coding index | 54.6 | 86.6 |
| Independent measurements behind it | 5 | 4 |
| Cost per solved task | $1.87 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Sonnet 5 better than Gemini 4 Carbon for coding?
Pick Gemini 4 Carbon for coding: it scores 86.6 on the Vibe Coding Index against 54.6 for Claude Sonnet 5, though on 4 benchmarks against 5. Pick Claude Sonnet 5 for work measured by Long context reasoning (AA-LCR), where it leads.
Which is cheaper, Claude Sonnet 5 or Gemini 4 Carbon?
Claude Sonnet 5 costs $2.00 per million input tokens and $10.00 per million output tokens; Gemini 4 Carbon costs $2.00 and $10.00. Cost per solved task is known for Claude Sonnet 5 only.
Which has the bigger context window, Claude Sonnet 5 or Gemini 4 Carbon?
Gemini 4 Carbon, with 1.05M tokens against 1M.
How many benchmarks is the Claude Sonnet 5 vs Gemini 4 Carbon comparison based on?
52 benchmarks have a result for both models as of November 14, 2026. Claude Sonnet 5's coding index rests on 5 independent benchmarks and Gemini 4 Carbon's on 4. Where only one model has a result, the page says so instead of naming a winner.