Claude Haiku 5.5 vs Gemini 3.5 Flash Lite
Claude Haiku 5.5 leads Gemini 3.5 Flash Lite on coding, 70.7 to 49.0 on the Vibe Coding Index, and Claude Haiku 5.5 costs 5.0x less per output token ($0.50 vs $2.50 per million). Updated October 22, 2026; 32 benchmarks have a result for both.
Claude Haiku 5.5 or Gemini 3.5 Flash Lite: which to pick
Pick Claude Haiku 5.5 for coding: it scores 70.7 on the Vibe Coding Index against 49.0 for Gemini 3.5 Flash Lite.
Pick Gemini 3.5 Flash Lite for a larger context window (1.05M against 1M tokens) and work measured by SAGE (Vals AI), where it leads.
- Shared results
- 32
- Claude Haiku 5.5 only
- 31
- Gemini 3.5 Flash Lite only
- 53
- 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 Haiku 5.5
Claude Haiku 5.5 scores 70.7 against 49.0.
5 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
Claude Haiku 5.5
Claude Haiku 5.5 leads, 43.4 against 22.2.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Gemini 3.5 Flash Lite has a AA Agentic Index result, 14.3.
Directional only
Reasoning
GPQA Diamond
No call
Only Gemini 3.5 Flash Lite has a GPQA Diamond result, 83.8%.
Directional only
Knowledge
MMLU Pro
No call
Only Gemini 3.5 Flash Lite has a MMLU Pro result, 85.8%.
Directional only
Web design
Design Arena: websites
No call
Only Claude Haiku 5.5 has a Design Arena: websites result, 1262.
Directional only
General
Vals Index
No call
Only Claude Haiku 5.5 has a Vals Index result, 58.7%.
Directional only
Long documents
Listed context window
Gemini 3.5 Flash Lite
Gemini 3.5 Flash Lite 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 3.5 Flash Lite $0.0015 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Gemini 3.5 Flash Lite has the number, $0.41.
Directional only
At a glance
- Coding index
- Claude Haiku 5.5 70.7 from 5 benchmarks, Gemini 3.5 Flash Lite 49.0 from 3 benchmarks.
- Widest category
- Math, 49.8 points apart on average over 4 shared benchmarks.
- Widest single gap
- ProofBench: Claude Haiku 5.5 89.0% against Gemini 3.5 Flash Lite 13.0%, 76.0 points apart on a 0 to 100 scale.
- Output price
- Claude Haiku 5.5 $0.50 against Gemini 3.5 Flash Lite $2.50 per million output tokens, 5.0x apart.
- Context window
- Claude Haiku 5.5 takes 1M tokens, Gemini 3.5 Flash Lite 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 3.5 Flash Lite | Ties |
|---|---|---|---|---|
| Coding | 8 | 0 | ||
| Intelligence | 2 | 0 | ||
| Agentic work | 5 | 0 | ||
| Reasoning | 6 | 0 | ||
| Math | 4 | 0 | ||
| Knowledge | 1 | 0 | ||
| General | 5 | 1 | ||
| All shared boards | 31 | 1 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index80
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | Leader |
|---|---|---|---|
| LiveBench coding | 91.4% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena WebDev | 1586 | 1435 | Claude Haiku 5.5 |
| AA Coding Index | Not measured | 49.3 | Only Gemini 3.5 Flash Lite measured |
| LiveCodeBench (Vals AI) | Not measured | 79.0% | Only Gemini 3.5 Flash Lite measured |
| SWE-bench Verified (Vals AI) | Not measured | 75.0% | Only Gemini 3.5 Flash Lite measured |
| Terminal-Bench 4 (Vals AI) | 36.4% | Not measured | Only Claude Haiku 5.5 measured |
| Vibe Code Bench (Vals AI) | 90.4% | 37.2% | Claude Haiku 5.5 |
| Code migration (Vals AI) | 44.6% | 6.2% | Claude Haiku 5.5 |
| ProgramBench (Vals AI) | 2.5% | 0.0% | Claude Haiku 5.5 |
| IOI (Vals AI) | 47.3% | Not measured | Only Claude Haiku 5.5 measured |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 50.2% | Only Gemini 3.5 Flash Lite 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% | 59.1% | Claude Haiku 5.5 |
| SciCode | 55.0% | 41.3% | Claude Haiku 5.5 |
| FrontierCode | 46.4% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierSWE | 43.8% | Not measured | Only Claude Haiku 5.5 measured |
| WeirdML | Not measured | 39.0% | Only Gemini 3.5 Flash Lite measured |
| ALE-Bench | Not measured | 765.3 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: coding | Not measured | 1453 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: software and IT | Not measured | 1451 | Only Gemini 3.5 Flash Lite measured |
| LMArena WebDev: React | 1605 | 1408 | Claude Haiku 5.5 |
| LMArena WebDev: HTML | 1569 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena WebDev: from an image | Not measured | 1448 | Only Gemini 3.5 Flash Lite measured |
| SciCode | 9.2% | 6.2% | Claude Haiku 5.5 |
| Neither model has a result on the other 14 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | Leader |
|---|---|---|---|
| AA Intelligence Index | 43.4 | 22.2 | Claude Haiku 5.5 |
| Epoch Capabilities Index | 159.3 | 144.9 | Claude Haiku 5.5 |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index50
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 14.3 | Only Gemini 3.5 Flash Lite measured |
| LiveBench research | 81.9% | Not measured | Only Claude Haiku 5.5 measured |
| LiveBench browser | 80.0% | Not measured | Only Claude Haiku 5.5 measured |
| LiveBench long agentic | 57.6% | Not measured | Only Claude Haiku 5.5 measured |
| SREBench (Vals AI) | 5.7% | Not measured | Only Claude Haiku 5.5 measured |
| Finance Agent (Vals AI) | 54.1% | 47.4% | Claude Haiku 5.5 |
| Tax Agent Bench (Vals AI) | 31.9% | 7.2% | Claude Haiku 5.5 |
| Legal Research Bench (Vals AI) | 43.3% | 13.9% | Claude Haiku 5.5 |
| Harvey's Legal Agent Benchmark (Vals AI) | 4.2% | Not measured | Only Claude Haiku 5.5 measured |
| Excel Modeling Benchmark (Vals AI) | 59.0% | 43.2% | Claude Haiku 5.5 |
| 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% | 29.3% | Claude Haiku 5.5 |
| Vending-Bench 2 | $3,602 | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 26 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index60
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 83.8% | Only Gemini 3.5 Flash Lite measured |
| LiveBench reasoning | 82.4% | Not measured | Only Claude Haiku 5.5 measured |
| MysteryMechanism (Vals AI) | 35.1% | Not measured | Only Claude Haiku 5.5 measured |
| MMMU Pro (Vals AI) | Not measured | 83.6% | Only Gemini 3.5 Flash Lite measured |
| GPQA Diamond (Artificial Analysis run) | Not measured | 83.8% | Only Gemini 3.5 Flash Lite measured |
| Humanity's Last Exam (Artificial Analysis run) | 44.4% | 18.8% | Claude Haiku 5.5 |
| GPQA Diamond (Epoch AI run) | 89.6% | 83.3% | Claude Haiku 5.5 |
| ARC-AGI | 89.0% | 53.5% | Claude Haiku 5.5 |
| ARC-AGI-2 | 61.3% | 10.3% | Claude Haiku 5.5 |
| Chess puzzles | 55.0% | 21.0% | Claude Haiku 5.5 |
| Mystery game puzzles | 30.0% | 19.0% | Claude Haiku 5.5 |
| EBR-bench | 43.8% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: hard prompts | Not measured | 1441 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: expert | Not measured | 1434 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: hard prompts in English | Not measured | 1440 | Only Gemini 3.5 Flash Lite measured |
| LMArena Vision: diagrams | Not measured | 1284 | Only Gemini 3.5 Flash Lite measured |
| LMArena Vision: homework | Not measured | 1291 | Only Gemini 3.5 Flash Lite measured |
| Neither model has a result on the other 5 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index40
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | Leader |
|---|---|---|---|
| OTIS Mock AIME | 98.9% | 71.1% | Claude Haiku 5.5 |
| FrontierMath, tiers 1 to 3 | 75.1% | 26.0% | Claude Haiku 5.5 |
| FrontierMath, tier 4 | 46.3% | 0.0% | Claude Haiku 5.5 |
| ProofBench | 89.0% | 13.0% | Claude Haiku 5.5 |
| LMArena Text: math | Not measured | 1434 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: mathematical work | Not measured | 1433 | Only Gemini 3.5 Flash Lite measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | Leader |
|---|---|---|---|
| MMLU Pro | Not measured | 85.8% | Only Gemini 3.5 Flash Lite measured |
| LegalBench (Vals AI) | Not measured | 84.1% | Only Gemini 3.5 Flash Lite measured |
| CorpFin (Vals AI) | Not measured | 60.7% | Only Gemini 3.5 Flash Lite measured |
| TaxEval (Vals AI) | Not measured | 72.6% | Only Gemini 3.5 Flash Lite measured |
| MortgageTax (Vals AI) | Not measured | 68.7% | Only Gemini 3.5 Flash Lite measured |
| MedCode (Vals AI) | 51.5% | 43.5% | Claude Haiku 5.5 |
| SimpleQA Verified | 23.8% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: science | Not measured | 1451 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: medicine and healthcare | Not measured | 1438 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: legal and government | Not measured | 1431 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: business and finance | Not measured | 1423 | Only Gemini 3.5 Flash Lite measured |
| FACTS Benchmark Suite | Not measured | 53.5% | Only Gemini 3.5 Flash Lite measured |
| Neither model has a result on the other 6 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | Leader |
|---|---|---|---|
| Design Arena: websites | 1262 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: UI components | 1291 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: game dev | 1313 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: data viz | 1294 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: 3D | 1342 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: all code categories | 1278 | Not measured | Only Claude Haiku 5.5 measured |
| LiveBench design | 83.1% | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 2 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index51
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | Leader |
|---|---|---|---|
| Vals Index | 58.7% | Not measured | Only Claude Haiku 5.5 measured |
| LiveBench data analysis | 53.1% | Not measured | Only Claude Haiku 5.5 measured |
| Public Benefits Bench (Vals AI) | 63.2% | 51.8% | Claude Haiku 5.5 |
| SAGE (Vals AI) | 45.8% | 47.3% | Gemini 3.5 Flash Lite |
| MedScribe (Vals AI) | 89.5% | 70.9% | Claude Haiku 5.5 |
| Long context reasoning (AA-LCR) | 82.7% | 76.0% | Claude Haiku 5.5 |
| DTBench | 95.0% | 83.5% | Claude Haiku 5.5 |
| LMCA | 51.1% | 37.6% | Claude Haiku 5.5 |
| Furniture assembly | 47.5% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text | Not measured | 1435 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: instruction following | Not measured | 1419 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: creative writing | Not measured | 1421 | Only Gemini 3.5 Flash Lite measured |
| LMArena Vision | Not measured | 1269 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: English | Not measured | 1438 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: non-English | Not measured | 1427 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: Chinese | Not measured | 1468 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: German | Not measured | 1454 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: Japanese | Not measured | 1426 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: Korean | Not measured | 1407 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: French | Not measured | 1451 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: Spanish | Not measured | 1441 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: Russian | Not measured | 1443 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: Polish | Not measured | 1437 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: multi-turn | Not measured | 1445 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: longer queries | Not measured | 1435 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: writing and language | Not measured | 1428 | Only Gemini 3.5 Flash Lite measured |
| LMArena Text: entertainment and media | Not measured | 1414 | Only Gemini 3.5 Flash Lite measured |
| LMArena Vision: English | Not measured | 1269 | Only Gemini 3.5 Flash Lite measured |
| LMArena Vision: Chinese | Not measured | 1311 | Only Gemini 3.5 Flash Lite measured |
| LMArena Vision: reading text | Not measured | 1280 | Only Gemini 3.5 Flash Lite measured |
| LMArena Vision: humor | Not measured | 1287 | Only Gemini 3.5 Flash Lite measured |
| LMArena Vision: creative writing | Not measured | 1260 | Only Gemini 3.5 Flash Lite measured |
| Neither model has a result on the other 14 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Haiku 5.5 | Gemini 3.5 Flash Lite | 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 3.5 Flash Lite |
|---|---|---|
| Maker | Anthropic | |
| Weights | No public weights listed | No public weights listed |
| Released | October 7, 2026 | July 21, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $0.10 | $0.30 |
| Output $/Mtok | $0.50 | $2.50 |
| Coding index | 70.7 | 49.0 |
| Independent measurements behind it | 5 | 3 |
| Cost per solved task | Not computable | $0.41 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Haiku 5.5 better than Gemini 3.5 Flash Lite for coding?
Pick Claude Haiku 5.5 for coding: it scores 70.7 on the Vibe Coding Index against 49.0 for Gemini 3.5 Flash Lite. Pick Gemini 3.5 Flash Lite for a larger context window (1.05M against 1M tokens) and work measured by SAGE (Vals AI), where it leads.
Which is cheaper, Claude Haiku 5.5 or Gemini 3.5 Flash Lite?
Claude Haiku 5.5 costs $0.10 per million input tokens and $0.50 per million output tokens; Gemini 3.5 Flash Lite costs $0.30 and $2.50. Cost per solved task is known for Gemini 3.5 Flash Lite only.
Which has the bigger context window, Claude Haiku 5.5 or Gemini 3.5 Flash Lite?
Gemini 3.5 Flash Lite, with 1.05M tokens against 1M.
How many benchmarks is the Claude Haiku 5.5 vs Gemini 3.5 Flash Lite comparison based on?
32 benchmarks have a result for both models as of October 22, 2026. Claude Haiku 5.5's coding index rests on 5 independent benchmarks and Gemini 3.5 Flash Lite's on 3. Where only one model has a result, the page says so instead of naming a winner.