Claude Opus 5.5 vs Gemini 4 Hydrogen
Claude Opus 5.5 leads Gemini 4 Hydrogen on coding, 87.3 to 77.9 on the Vibe Coding Index, and Gemini 4 Hydrogen costs 2.7x less per output token ($7.50 vs $20.00 per million). Updated November 14, 2026; 50 benchmarks have a result for both.
vs boards won of 50 shared, 1 tied
Claude Opus 5.5 or Gemini 4 Hydrogen: which to pick
Pick Claude Opus 5.5 for coding: it scores 87.3 on the Vibe Coding Index against 77.9 for Gemini 4 Hydrogen.
Pick Gemini 4 Hydrogen for output tokens 2.7x cheaper ($7.50 vs $20.00 per million) and a larger context window (1.05M against 1M tokens).
Model AClaude Opus 5.5Anthropic87.3/1005 independent benchmarksNo cost per solved taskModel BGemini 4 HydrogenGoogle77.9/1004 independent benchmarksNo cost per solved task
- Shared results
- 50
- Claude Opus 5.5 only
- 88
- Gemini 4 Hydrogen only
- 0
- 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 5.5
Claude Opus 5.5 scores 87.3 against 77.9.
5 and 4 benchmarks behind the scores
Intelligence
AA Intelligence Index
No call
Only Claude Opus 5.5 has a AA Intelligence Index result, 59.1.
Directional only
Web design
Design Arena: websites
Claude Opus 5.5
Claude Opus 5.5 leads, 1326 against 1320.
Same board, both measured
General
Vals Index
Claude Opus 5.5
Claude Opus 5.5 leads, 70.1% against 68.5%.
Same board, both measured
Long documents
Listed context window
Gemini 4 Hydrogen
Gemini 4 Hydrogen takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemini 4 Hydrogen
Claude Opus 5.5 $0.014, Gemini 4 Hydrogen $0.0053 per turn.
List prices
At a glance
- Coding index
- Claude Opus 5.5 87.3 from 5 benchmarks, Gemini 4 Hydrogen 77.9 from 4 benchmarks.
- Widest category
- Agentic work, 6.3 points apart on average over 6 shared benchmarks.
- Widest single gap
- LMArena WebDev: Claude Opus 5.5 1815 against Gemini 4 Hydrogen 1704, 15.8 points apart on a 0 to 100 scale.
- Output price
- Claude Opus 5.5 $20.00 against Gemini 4 Hydrogen $7.50 per million output tokens, 2.7x apart.
- Context window
- Claude Opus 5.5 takes 1M tokens, Gemini 4 Hydrogen 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 5.5 | Bars | Gemini 4 Hydrogen | Ties |
|---|---|---|---|---|
| Coding | 9 | 1 | 1 tie | |
| Agentic work | 3 | 3 | ||
| Reasoning | 5 | 1 | ||
| Math | 1 | 1 | ||
| Knowledge | 4 | 1 | ||
| Web design | 5 | 0 | ||
| General | 12 | 3 | ||
| All shared boards | 39 | 10 | 1 tie |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index91
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench coding | 87.1% | 78.5% | Claude Opus 5.5 |
| LMArena WebDev | 1815 | 1704 | Claude Opus 5.5 |
| Terminal-Bench 4 (Vals AI) | 65.2% | 54.0% | Claude Opus 5.5 |
| Vibe Code Bench (Vals AI) | 90.3% | 87.8% | Claude Opus 5.5 |
| Code migration (Vals AI) | 66.7% | Not measured | Only Claude Opus 5.5 measured |
| ProgramBench (Vals AI) | 18.5% | Not measured | Only Claude Opus 5.5 measured |
| IOI (Vals AI) | 95.1% | Not measured | Only Claude Opus 5.5 measured |
| Terminal-Bench 2.1 (Vals AI) | 87.6% | Not measured | Only Claude Opus 5.5 measured |
| SWE-bench Multimodal (Vals AI) | 70.2% | Not measured | Only Claude Opus 5.5 measured |
| Vibe Code Bench 1-100 (Vals AI) | 30.4% | Not measured | Only Claude Opus 5.5 measured |
| CyberBench (Vals AI) | 74.6% | Not measured | Only Claude Opus 5.5 measured |
| SciCode | 66.9% | Not measured | Only Claude Opus 5.5 measured |
| Terminal-Bench 4.0 (Artificial Analysis run) | 59.6% | 54.0% | Claude Opus 5.5 |
| FrontierCode 2.0 | 46.4% | 39.0% | Claude Opus 5.5 |
| FrontierCode | 54.6% | Not measured | Only Claude Opus 5.5 measured |
| FrontierSWE | 62.3% | Not measured | Only Claude Opus 5.5 measured |
| MirrorCode | 95.6% | Not measured | Only Claude Opus 5.5 measured |
| ALE-Bench | 2147.4 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: coding | 1543 | 1516 | Claude Opus 5.5 |
| LMArena Text: software and IT | 1533 | 1513 | Claude Opus 5.5 |
| LMArena WebDev: React | 1868 | 1724 | Claude Opus 5.5 |
| LMArena WebDev: HTML | 1727 | 1743 | Gemini 4 Hydrogen |
| LMArena WebDev: from an image | 1752 | Not measured | Only Claude Opus 5.5 measured |
| SciCode | 18.5% | Not measured | Only Claude Opus 5.5 measured |
| GameBench 2 | 94.8 | Not measured | Only Claude Opus 5.5 measured |
| Terminal-Bench 4.0 | 64.8% | Not measured | Only Claude Opus 5.5 measured |
| CursorBench 4.0 | 57.8% | 57.8% | Tie |
| ProgramBench | 18.5% | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 24 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| AA Intelligence Index | 59.1 | Not measured | Only Claude Opus 5.5 measured |
| Epoch Capabilities Index | 168.5 | Not measured | Only Claude Opus 5.5 measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index33
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Design Arena: agents building web apps | 1321 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: agents building full-stack apps | 1390 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: agents building mobile apps | 1294 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: agents building Android apps | 1392 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: agents building games | 1456 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: HTML slides | 1471 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: PowerPoint slides | 1391 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: spreadsheets | 1328 | Not measured | Only Claude Opus 5.5 measured |
| LiveBench research | 88.9% | 86.8% | Claude Opus 5.5 |
| LiveBench browser | 88.4% | 77.1% | Claude Opus 5.5 |
| LiveBench long agentic | 72.8% | 61.8% | Claude Opus 5.5 |
| SREBench (Vals AI) | 33.6% | Not measured | Only Claude Opus 5.5 measured |
| Finance Agent (Vals AI) | 58.6% | Not measured | Only Claude Opus 5.5 measured |
| Tax Agent Bench (Vals AI) | 44.5% | 52.3% | Gemini 4 Hydrogen |
| Legal Research Bench (Vals AI) | 50.5% | 53.8% | Gemini 4 Hydrogen |
| Harvey's Legal Agent Benchmark (Vals AI) | 9.2% | 11.3% | Gemini 4 Hydrogen |
| Excel Modeling Benchmark (Vals AI) | 75.9% | Not measured | Only Claude Opus 5.5 measured |
| BioMysteryBench (Vals AI) | 79.3% | Not measured | Only Claude Opus 5.5 measured |
| Terminal-Bench-Science (Vals AI) | 47.1% | Not measured | Only Claude Opus 5.5 measured |
| Vals Science Index | 58.7% | Not measured | Only Claude Opus 5.5 measured |
| Time Horizon Index (Vals AI) | 91.3% | Not measured | Only Claude Opus 5.5 measured |
| CUA-bench (Vals AI) | 14.0% | Not measured | Only Claude Opus 5.5 measured |
| Robo-bench (Vals AI) | 14.6% | Not measured | Only Claude Opus 5.5 measured |
| APEX-Agents | 73.5% | Not measured | Only Claude Opus 5.5 measured |
| Remote Labor Index | 21.3% | Not measured | Only Claude Opus 5.5 measured |
| PostTrainBench | 43.8% | Not measured | Only Claude Opus 5.5 measured |
| SpireClimb | 5.8% | Not measured | Only Claude Opus 5.5 measured |
| Vending-Bench 2 | $9,235 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Search | 1213 | Not measured | Only Claude Opus 5.5 measured |
| MCP Atlas | 85.4% | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 14 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index51
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench reasoning | 92.2% | 88.6% | Claude Opus 5.5 |
| MysteryMechanism (Vals AI) | 49.5% | Not measured | Only Claude Opus 5.5 measured |
| Humanity's Last Exam (Artificial Analysis run) | 61.4% | Not measured | Only Claude Opus 5.5 measured |
| HLE-Diamond (Artificial Analysis run) | 67.9% | 58.8% | Claude Opus 5.5 |
| CritPt v2, hard subset (Artificial Analysis run) | 68.0% | 66.0% | Claude Opus 5.5 |
| GPQA Diamond (Epoch AI run) | 90.6% | Not measured | Only Claude Opus 5.5 measured |
| ARC-AGI | 98.5% | Not measured | Only Claude Opus 5.5 measured |
| ARC-AGI-2 | 93.3% | Not measured | Only Claude Opus 5.5 measured |
| SimpleBench | 88.4% | Not measured | Only Claude Opus 5.5 measured |
| Chess puzzles | 67.0% | Not measured | Only Claude Opus 5.5 measured |
| Mystery game puzzles | 71.0% | Not measured | Only Claude Opus 5.5 measured |
| EBR-bench | 71.4% | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: hard prompts | 1531 | 1520 | Claude Opus 5.5 |
| LMArena Text: expert | 1555 | 1558 | Gemini 4 Hydrogen |
| LMArena Text: hard prompts in English | 1536 | 1514 | Claude Opus 5.5 |
| LMArena Vision: diagrams | 1354 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Vision: homework | 1357 | Not measured | Only Claude Opus 5.5 measured |
| Humanity's Last Exam (Scale run) | 55.0% | Not measured | Only Claude Opus 5.5 measured |
| GoBench | 2274 | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 7 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index11
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| OTIS Mock AIME | 100.0% | Not measured | Only Claude Opus 5.5 measured |
| FrontierMath, tiers 1 to 3 | 91.2% | Not measured | Only Claude Opus 5.5 measured |
| FrontierMath, tier 4 | 95.0% | Not measured | Only Claude Opus 5.5 measured |
| ProofBench | 100.0% | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: math | 1520 | 1507 | Claude Opus 5.5 |
| LMArena Text: mathematical work | 1532 | 1534 | Gemini 4 Hydrogen |
| MathArena | 75.3% | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index41
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| MedCode (Vals AI) | 49.8% | Not measured | Only Claude Opus 5.5 measured |
| AA-Omniscience | 48.1 | 46.3 | Claude Opus 5.5 |
| SimpleQA Verified | 72.2% | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: science | 1525 | 1519 | Claude Opus 5.5 |
| LMArena Text: medicine and healthcare | 1511 | 1488 | Claude Opus 5.5 |
| LMArena Text: legal and government | 1519 | 1532 | Gemini 4 Hydrogen |
| LMArena Text: business and finance | 1494 | 1486 | Claude Opus 5.5 |
| FACTS Benchmark Suite | 66.5% | Not measured | Only Claude Opus 5.5 measured |
| PRBench Legal | 47.6% | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 12 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index50
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Design Arena: websites | 1326 | 1320 | Claude Opus 5.5 |
| Design Arena: UI components | 1377 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: game dev | 1427 | 1369 | Claude Opus 5.5 |
| Design Arena: data viz | 1387 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: 3D | 1460 | 1415 | Claude Opus 5.5 |
| Design Arena: all code categories | 1384 | 1333 | Claude Opus 5.5 |
| Design Arena: SVG | 1320 | Not measured | Only Claude Opus 5.5 measured |
| Design Arena: ASCII art | 1354 | Not measured | Only Claude Opus 5.5 measured |
| LiveBench design | 83.3% | 77.3% | Claude Opus 5.5 |
GeneralLike-for-likePublic boards, shown as published, kept out of the index123
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Vals Index | 70.1% | 68.5% | Claude Opus 5.5 |
| LiveBench data analysis | 80.3% | 83.2% | Gemini 4 Hydrogen |
| Public Benefits Bench (Vals AI) | 70.6% | Not measured | Only Claude Opus 5.5 measured |
| SAGE (Vals AI) | 91.3% | Not measured | Only Claude Opus 5.5 measured |
| MedScribe (Vals AI) | 91.4% | Not measured | Only Claude Opus 5.5 measured |
| Long context reasoning (AA-LCR) | 84.7% | Not measured | Only Claude Opus 5.5 measured |
| GDPval-AA | 1866 | Not measured | Only Claude Opus 5.5 measured |
| DTBench | 98.9% | Not measured | Only Claude Opus 5.5 measured |
| LMCA | 68.2% | Not measured | Only Claude Opus 5.5 measured |
| Furniture assembly | 83.3% | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text | 1514 | 1502 | Claude Opus 5.5 |
| LMArena Text: instruction following | 1535 | 1519 | Claude Opus 5.5 |
| LMArena Text: creative writing | 1532 | 1509 | Claude Opus 5.5 |
| LMArena Vision | 1324 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: English | 1521 | 1499 | Claude Opus 5.5 |
| LMArena Text: non-English | 1503 | 1495 | Claude Opus 5.5 |
| LMArena Text: Chinese | 1573 | 1631 | Gemini 4 Hydrogen |
| LMArena Text: German | 1513 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: Japanese | 1527 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: Korean | 1505 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: French | 1498 | 1512 | Gemini 4 Hydrogen |
| LMArena Text: Spanish | 1510 | 1494 | Claude Opus 5.5 |
| LMArena Text: Russian | 1517 | 1492 | Claude Opus 5.5 |
| LMArena Text: Polish | 1511 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Text: multi-turn | 1502 | 1485 | Claude Opus 5.5 |
| LMArena Text: longer queries | 1528 | 1524 | Claude Opus 5.5 |
| LMArena Text: writing and language | 1528 | 1500 | Claude Opus 5.5 |
| LMArena Text: entertainment and media | 1508 | 1503 | Claude Opus 5.5 |
| LMArena Vision: English | 1321 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Vision: Chinese | 1380 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Vision: reading text | 1332 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Vision: humor | 1267 | Not measured | Only Claude Opus 5.5 measured |
| LMArena Vision: creative writing | 1317 | Not measured | Only Claude Opus 5.5 measured |
| EQ-Bench 4 | 1340 | Not measured | Only Claude Opus 5.5 measured |
| Neither model has a result on the other 15 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Opus 5.5 | Gemini 4 Hydrogen | 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 Opus 5.5$0.014Fits in one request
Gemini 4 Hydrogen$0.0053Fits in one request
Gemini 4 Hydrogen costs less
Repository review
50K input + 3K output tokens
Claude Opus 5.5$0.260Fits in one request
Gemini 4 Hydrogen$0.098Fits in one request
Gemini 4 Hydrogen costs less
Agent loop
200K input + 10K output tokens
Claude Opus 5.5$1.00Fits in one request
Gemini 4 Hydrogen$0.375Fits in one request
Gemini 4 Hydrogen 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 5.5 | Google Gemini 4 Hydrogen |
|---|---|---|
| Maker | Anthropic | |
| Weights | No public weights listed | No public weights listed |
| Released | September 22, 2026 | November 12, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $4.00 | $1.50 |
| Output $/Mtok | $20.00 | $7.50 |
| Coding index | 87.3 | 77.9 |
| Independent measurements behind it | 5 | 4 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Opus 5.5 better than Gemini 4 Hydrogen for coding?
Pick Claude Opus 5.5 for coding: it scores 87.3 on the Vibe Coding Index against 77.9 for Gemini 4 Hydrogen. Pick Gemini 4 Hydrogen for output tokens 2.7x cheaper ($7.50 vs $20.00 per million) and a larger context window (1.05M against 1M tokens).
Which is cheaper, Claude Opus 5.5 or Gemini 4 Hydrogen?
Claude Opus 5.5 costs $4.00 per million input tokens and $20.00 per million output tokens; Gemini 4 Hydrogen costs $1.50 and $7.50. Cost per solved task is known for neither of them.
Which has the bigger context window, Claude Opus 5.5 or Gemini 4 Hydrogen?
Gemini 4 Hydrogen, with 1.05M tokens against 1M.
How many benchmarks is the Claude Opus 5.5 vs Gemini 4 Hydrogen comparison based on?
50 benchmarks have a result for both models as of November 14, 2026. Claude Opus 5.5's coding index rests on 5 independent benchmarks and Gemini 4 Hydrogen's on 4. Where only one model has a result, the page says so instead of naming a winner.