Claude Haiku 5.5 vs Gemini 4 Hydrogen
Gemini 4 Hydrogen leads Claude Haiku 5.5 on coding, 77.9 to 68.4 on the Vibe Coding Index, and Claude Haiku 5.5 costs 15.0x less per output token ($0.50 vs $7.50 per million). Updated November 14, 2026; 50 benchmarks have a result for both.
Claude Haiku 5.5 or Gemini 4 Hydrogen: which to pick
Pick Gemini 4 Hydrogen for coding: it scores 77.9 on the Vibe Coding Index against 68.4 for Claude Haiku 5.5, though on 4 benchmarks against 5.
Pick Claude Haiku 5.5 for output tokens 15.0x cheaper ($0.50 vs $7.50 per million) and work measured by Vibe Code Bench (Vals AI) or LiveBench design, where it leads.
- Shared results
- 50
- Claude Haiku 5.5 only
- 57
- 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
Gemini 4 Hydrogen
Gemini 4 Hydrogen scores 77.9 against 68.4.
5 and 4 benchmarks behind the scores
Intelligence
AA Intelligence Index
No call
Only Claude Haiku 5.5 has a AA Intelligence Index result, 36.5.
Directional only
Web design
Design Arena: websites
Gemini 4 Hydrogen
Gemini 4 Hydrogen leads, 1320 against 1253.
Same board, both measured
General
Vals Index
Gemini 4 Hydrogen
Gemini 4 Hydrogen leads, 68.5% against 58.7%.
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
Claude Haiku 5.5
Claude Haiku 5.5 $0.0003, Gemini 4 Hydrogen $0.0053 per turn.
List prices
At a glance
- Coding index
- Claude Haiku 5.5 68.4 from 5 benchmarks, Gemini 4 Hydrogen 77.9 from 4 benchmarks.
- Widest category
- General, 20.0 points apart on average over 15 shared benchmarks.
- Widest single gap
- LiveBench data analysis: Claude Haiku 5.5 53.1% against Gemini 4 Hydrogen 83.2%, 30.1 points apart on a 0 to 100 scale.
- Output price
- Claude Haiku 5.5 $0.50 against Gemini 4 Hydrogen $7.50 per million output tokens, 15.0x apart.
- Context window
- Claude Haiku 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 Haiku 5.5 | Bars | Gemini 4 Hydrogen | Ties |
|---|---|---|---|---|
| Coding | 1 | 10 | ||
| Agentic work | 0 | 6 | ||
| Reasoning | 0 | 6 | ||
| Math | 0 | 2 | ||
| Knowledge | 0 | 5 | ||
| Web design | 1 | 4 | ||
| General | 0 | 15 | ||
| All shared boards | 2 | 48 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index110
| Benchmark | Claude Haiku 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench coding | 77.6% | 78.5% | Gemini 4 Hydrogen |
| LMArena WebDev | 1593 | 1704 | Gemini 4 Hydrogen |
| Terminal-Bench 4 (Vals AI) | 36.4% | 54.0% | Gemini 4 Hydrogen |
| Vibe Code Bench (Vals AI) | 90.4% | 87.8% | Claude Haiku 5.5 |
| Code migration (Vals AI) | 44.6% | Not measured | Only Claude Haiku 5.5 measured |
| ProgramBench (Vals AI) | 2.5% | Not measured | Only Claude Haiku 5.5 measured |
| IOI (Vals AI) | 47.3% | Not measured | Only Claude Haiku 5.5 measured |
| SWE-bench Multimodal (Vals AI) | 44.0% | Not measured | Only Claude Haiku 5.5 measured |
| Vibe Code Bench 1-100 (Vals AI) | 20.4% | Not measured | Only Claude Haiku 5.5 measured |
| CyberBench (Vals AI) | 75.5% | Not measured | Only Claude Haiku 5.5 measured |
| SciCode | 55.0% | Not measured | Only Claude Haiku 5.5 measured |
| Terminal-Bench 4.0 (Artificial Analysis run) | 32.8% | 54.0% | Gemini 4 Hydrogen |
| FrontierCode 2.0 | 34.9% | 39.0% | Gemini 4 Hydrogen |
| FrontierCode | 46.4% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierSWE | 43.8% | Not measured | Only Claude Haiku 5.5 measured |
| MirrorCode | 78.9% | Not measured | Only Claude Haiku 5.5 measured |
| ALE-Bench | 1587.0 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: coding | 1454 | 1516 | Gemini 4 Hydrogen |
| LMArena Text: software and IT | 1443 | 1513 | Gemini 4 Hydrogen |
| LMArena WebDev: React | 1615 | 1724 | Gemini 4 Hydrogen |
| LMArena WebDev: HTML | 1564 | 1743 | Gemini 4 Hydrogen |
| SciCode | 9.2% | Not measured | Only Claude Haiku 5.5 measured |
| SWE-Bench Pro V2 | 87.2% | Not measured | Only Claude Haiku 5.5 measured |
| GameBench 2 | 75.1 | Not measured | Only Claude Haiku 5.5 measured |
| Terminal-Bench 4.0 | 40.0% | Not measured | Only Claude Haiku 5.5 measured |
| CursorBench 4.0 | 48.4% | 57.8% | Gemini 4 Hydrogen |
| Neither model has a result on the other 26 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
| Benchmark | Claude Haiku 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| AA Intelligence Index | 36.5 | Not measured | Only Claude Haiku 5.5 measured |
| Epoch Capabilities Index | 160.4 | Not measured | Only Claude Haiku 5.5 measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index06
| Benchmark | Claude Haiku 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench research | 84.3% | 86.8% | Gemini 4 Hydrogen |
| LiveBench browser | 69.5% | 77.1% | Gemini 4 Hydrogen |
| LiveBench long agentic | 47.9% | 61.8% | Gemini 4 Hydrogen |
| SREBench (Vals AI) | 5.7% | Not measured | Only Claude Haiku 5.5 measured |
| Finance Agent (Vals AI) | 54.1% | Not measured | Only Claude Haiku 5.5 measured |
| Tax Agent Bench (Vals AI) | 31.9% | 52.3% | Gemini 4 Hydrogen |
| Legal Research Bench (Vals AI) | 43.8% | 53.8% | Gemini 4 Hydrogen |
| Harvey's Legal Agent Benchmark (Vals AI) | 4.2% | 11.3% | Gemini 4 Hydrogen |
| Excel Modeling Benchmark (Vals AI) | 59.0% | Not measured | Only Claude Haiku 5.5 measured |
| BioMysteryBench (Vals AI) | 70.4% | Not measured | Only Claude Haiku 5.5 measured |
| Terminal-Bench-Science (Vals AI) | 10.0% | Not measured | Only Claude Haiku 5.5 measured |
| Vals Science Index | 38.5% | Not measured | Only Claude Haiku 5.5 measured |
| APEX-Agents | 56.1% | Not measured | Only Claude Haiku 5.5 measured |
| Vending-Bench 2 | $3,602 | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 30 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index06
| Benchmark | Claude Haiku 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench reasoning | 82.4% | 88.6% | Gemini 4 Hydrogen |
| MysteryMechanism (Vals AI) | 35.1% | Not measured | Only Claude Haiku 5.5 measured |
| Humanity's Last Exam (Artificial Analysis run) | 44.4% | Not measured | Only Claude Haiku 5.5 measured |
| HLE-Diamond (Artificial Analysis run) | 29.6% | 58.8% | Gemini 4 Hydrogen |
| CritPt v2, hard subset (Artificial Analysis run) | 47.5% | 66.0% | Gemini 4 Hydrogen |
| GPQA Diamond (Epoch AI run) | 89.6% | Not measured | Only Claude Haiku 5.5 measured |
| ARC-AGI | 89.0% | Not measured | Only Claude Haiku 5.5 measured |
| ARC-AGI-2 | 61.3% | Not measured | Only Claude Haiku 5.5 measured |
| Chess puzzles | 55.0% | Not measured | Only Claude Haiku 5.5 measured |
| Mystery game puzzles | 30.0% | Not measured | Only Claude Haiku 5.5 measured |
| EBR-bench | 43.8% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: hard prompts | 1418 | 1520 | Gemini 4 Hydrogen |
| LMArena Text: expert | 1443 | 1558 | Gemini 4 Hydrogen |
| LMArena Text: hard prompts in English | 1422 | 1514 | Gemini 4 Hydrogen |
| Neither model has a result on the other 12 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | Claude Haiku 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| OTIS Mock AIME | 98.9% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierMath, tiers 1 to 3 | 75.1% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierMath, tier 4 | 46.3% | Not measured | Only Claude Haiku 5.5 measured |
| ProofBench | 89.0% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: math | 1436 | 1507 | Gemini 4 Hydrogen |
| LMArena Text: mathematical work | 1437 | 1534 | Gemini 4 Hydrogen |
| Neither model has a result on the other 8 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index05
| Benchmark | Claude Haiku 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| MedCode (Vals AI) | 51.5% | Not measured | Only Claude Haiku 5.5 measured |
| AA-Omniscience | 12.3 | 46.3 | Gemini 4 Hydrogen |
| SimpleQA Verified | 23.8% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: science | 1411 | 1519 | Gemini 4 Hydrogen |
| LMArena Text: medicine and healthcare | 1367 | 1488 | Gemini 4 Hydrogen |
| LMArena Text: legal and government | 1389 | 1532 | Gemini 4 Hydrogen |
| LMArena Text: business and finance | 1400 | 1486 | Gemini 4 Hydrogen |
| FACTS Benchmark Suite | 47.3% | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 13 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index14
| Benchmark | Claude Haiku 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Design Arena: websites | 1253 | 1320 | Gemini 4 Hydrogen |
| Design Arena: UI components | 1271 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: game dev | 1316 | 1369 | Gemini 4 Hydrogen |
| Design Arena: data viz | 1277 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: 3D | 1321 | 1415 | Gemini 4 Hydrogen |
| Design Arena: all code categories | 1278 | 1333 | Gemini 4 Hydrogen |
| Design Arena: SVG | 1193 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: ASCII art | 1210 | Not measured | Only Claude Haiku 5.5 measured |
| LiveBench design | 79.3% | 77.3% | Claude Haiku 5.5 |
GeneralLike-for-likePublic boards, shown as published, kept out of the index015
| Benchmark | Claude Haiku 5.5 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Vals Index | 58.7% | 68.5% | Gemini 4 Hydrogen |
| LiveBench data analysis | 53.1% | 83.2% | Gemini 4 Hydrogen |
| Public Benefits Bench (Vals AI) | 63.2% | Not measured | Only Claude Haiku 5.5 measured |
| SAGE (Vals AI) | 89.8% | Not measured | Only Claude Haiku 5.5 measured |
| MedScribe (Vals AI) | 89.5% | Not measured | Only Claude Haiku 5.5 measured |
| Long context reasoning (AA-LCR) | 82.7% | Not measured | Only Claude Haiku 5.5 measured |
| GDPval-AA | 1629 | Not measured | Only Claude Haiku 5.5 measured |
| DTBench | 95.0% | Not measured | Only Claude Haiku 5.5 measured |
| LMCA | 51.1% | Not measured | Only Claude Haiku 5.5 measured |
| Furniture assembly | 47.5% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text | 1398 | 1502 | Gemini 4 Hydrogen |
| LMArena Text: instruction following | 1411 | 1519 | Gemini 4 Hydrogen |
| LMArena Text: creative writing | 1337 | 1509 | Gemini 4 Hydrogen |
| LMArena Text: English | 1406 | 1499 | Gemini 4 Hydrogen |
| LMArena Text: non-English | 1385 | 1495 | Gemini 4 Hydrogen |
| LMArena Text: Chinese | 1433 | 1631 | Gemini 4 Hydrogen |
| LMArena Text: German | 1429 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: Japanese | 1374 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: Korean | 1382 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: French | 1427 | 1512 | Gemini 4 Hydrogen |
| LMArena Text: Spanish | 1397 | 1494 | Gemini 4 Hydrogen |
| LMArena Text: Russian | 1377 | 1492 | Gemini 4 Hydrogen |
| LMArena Text: Polish | 1378 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: multi-turn | 1388 | 1485 | Gemini 4 Hydrogen |
| LMArena Text: longer queries | 1395 | 1524 | Gemini 4 Hydrogen |
| LMArena Text: writing and language | 1369 | 1500 | Gemini 4 Hydrogen |
| LMArena Text: entertainment and media | 1351 | 1503 | Gemini 4 Hydrogen |
| MultiChallenge | 67.7% | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 21 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Haiku 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 Haiku 5.5 costs less
Repository review
50K input + 3K output tokens
Claude Haiku 5.5 costs less
Agent loop
200K input + 10K output tokens
Claude Haiku 5.5 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 | Anthropic Claude Haiku 5.5 | Google Gemini 4 Hydrogen |
|---|---|---|
| Maker | Anthropic | |
| Weights | No public weights listed | No public weights listed |
| Released | October 7, 2026 | November 12, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $0.10 | $1.50 |
| Output $/Mtok | $0.50 | $7.50 |
| Coding index | 68.4 | 77.9 |
| Independent measurements behind it | 5 | 4 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Haiku 5.5 better than Gemini 4 Hydrogen for coding?
Pick Gemini 4 Hydrogen for coding: it scores 77.9 on the Vibe Coding Index against 68.4 for Claude Haiku 5.5, though on 4 benchmarks against 5. Pick Claude Haiku 5.5 for output tokens 15.0x cheaper ($0.50 vs $7.50 per million) and work measured by Vibe Code Bench (Vals AI) or LiveBench design, where it leads.
Which is cheaper, Claude Haiku 5.5 or Gemini 4 Hydrogen?
Claude Haiku 5.5 costs $0.10 per million input tokens and $0.50 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 Haiku 5.5 or Gemini 4 Hydrogen?
Gemini 4 Hydrogen, with 1.05M tokens against 1M.
How many benchmarks is the Claude Haiku 5.5 vs Gemini 4 Hydrogen comparison based on?
50 benchmarks have a result for both models as of November 14, 2026. Claude Haiku 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.