Model comparison
Claude Haiku 5.5 vs Gemini 2.5 Pro
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 45.0 on the Noometry Index.
Last verified . 5 shared benchmarks.
GoogleSummary
- They share 5 benchmarks with published results for both. Claude Haiku 5.5 scores higher in 3 categories and Gemini 2.5 Pro in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 32.5.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 75.1% for Claude Haiku 5.5 and 24.6% for Gemini 2.5 Pro.
- Claude Haiku 5.5 is cheaper at $0.10 / $0.50 per million input/output tokens, against $1.25 / $10 for Gemini 2.5 Pro.
- Gemini 2.5 Pro accepts more context: 1.05M tokens versus 1M.
Side by side
| Claude Haiku 5.5 | Gemini 2.5 Pro | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 49.5 | 45.0 |
| Released | 2026-10-07 | 2025-03-25 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1.05M |
| Max output | 128K | 66K |
| Input $ / M tokens | $0.10 | $1.25 |
| Output $ / M tokens | $0.50 | $10 |
| Results tracked | 9 | 78 |
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Category by category
Coding Claude Haiku 5.5 leads
Claude Haiku 5.5: 49.2 (#50), Gemini 2.5 Pro: 42.4 (#101)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LMArena WebDev | 1587 | 1227 |
| SWE-bench Verified | — | 57.6% |
| SWE-bench Verified (bash only) | — | 53.6% |
| Aider Polyglot | — | 83.1% |
| SciCode | — | 42.8% |
| GSO | — | 3.9% |
| WeirdML | — | 54% |
| LiveBench Coding | — | 85.9% |
| LMArena Coding | — | 1452 |
| CadEval | — | 64% |
| ALE-Bench | — | 785.52 |
| AlgoTune | — | 1.51 |
Agentic & Tool Use Not comparable
Claude Haiku 5.5: —, Gemini 2.5 Pro: 29.2 (#88)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| Terminal-Bench | — | 32.6% |
| GDPval | — | 23.3% |
| Remote Labor Index | — | 0.8% |
| TheAgentCompany | — | 30.3% |
| τ²-bench Banking | — | 13.7% |
| DeepResearch Bench | — | 42.8% |
| BALROG | — | 43.3% |
| LMArena Search | — | 1142 |
| METR Time Horizons | — | 55.4% |
| Vending-Bench 2 | — | 573.64 |
Reasoning Claude Haiku 5.5 leads
Claude Haiku 5.5: 35.2 (#69), Gemini 2.5 Pro: 28.8 (#99)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| ARC-AGI-2 | — | 4.9% |
| SimpleBench | — | 62.4% |
| Kagi LLM Benchmark | — | 70.3% |
| NYT Connections (extended) | 65.7% | — |
| ARC-AGI-1 | — | 41% |
| CritPt | — | 2% |
| Chess Puzzles | — | 20% |
| EnigmaEval | — | 5.6% |
| LiveBench Reasoning | — | 89.8% |
| LMArena Hard Prompts | — | 1455 |
| Mystery Game Puzzles | 30% | — |
| DTBench | — | 82.4% |
| LiveBench Data Analysis | — | 79.9% |
| LMCA | — | 34.8% |
| Epoch Capabilities Index | — | 145.32 |
| ForecastBench | — | 61.3 |
| LiveBench | — | 82.3% |
Math Claude Haiku 5.5 leads
Claude Haiku 5.5: 73.6 (#18), Gemini 2.5 Pro: 32.5 (#213)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 75.1% | 24.6% |
| FrontierMath Tier 4 | 46.3% | 0% |
| OTIS Mock AIME 2024-2025 | 98.9% | 84.7% |
| Omni-MATH | — | 41.6% |
| LiveBench Math | — | 90.2% |
| LMArena Math | — | 1450 |
| MATH Level 5 | — | 95.9% |
| FrontierMath (Feb 2025 set) | — | 14.1% |
| FrontierMath Tier 4 (v1) | — | 4.2% |
Knowledge Gemini 2.5 Pro leads
Claude Haiku 5.5: 50.8 (#70), Gemini 2.5 Pro: 56.0 (#46)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| GPQA Diamond | 89.6% | 85.3% |
| Humanity's Last Exam | — | 21.6% |
| SimpleQA Verified | 23.8% | — |
| MMLU-Pro | — | 86.3% |
| Confabulations | — | 10.6% |
| Vectara Hallucination Rate | — | 7% |
| GPQA (HELM) | — | 74.9% |
| LMArena Expert | — | 1452 |
Multimodal Gemini 2.5 Pro leads
Claude Haiku 5.5: 43.7 (#21), Gemini 2.5 Pro: 45.2 (#18)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LMArena Vision | — | 1263 |
| GeoBench | — | 86% |
| VPCT | — | 48% |
| Furniture Assembly | 47.5% | — |
| LMArena Document | — | 1421 |
| SpatialViz-Bench | — | 44.7% |
Multilingual Not comparable
Claude Haiku 5.5: —, Gemini 2.5 Pro: 55.3 (#31)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LMArena Non-English | — | 1451 |
| LMArena Chinese | — | 1507 |
| LMArena French | — | 1472 |
| LMArena German | — | 1487 |
| LMArena Japanese | — | 1461 |
| LMArena Korean | — | 1434 |
| LMArena Russian | — | 1461 |
| LMArena Spanish | — | 1473 |
Instruction Following Not comparable
Claude Haiku 5.5: —, Gemini 2.5 Pro: 75.0 (#75)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LiveBench Instruction Following | — | 80.6% |
| IFEval | — | 84% |
| LMArena Instruction Following | — | 1437 |
Long Context Not comparable
Claude Haiku 5.5: —, Gemini 2.5 Pro: 59.8 (#5)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| Fiction.LiveBench | — | 91.7% |
| LMArena Longer Query | — | 1449 |
Writing & Preference Not comparable
Claude Haiku 5.5: —, Gemini 2.5 Pro: 63.7 (#62)
| Benchmark | Claude Haiku 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LMArena Text | — | 1458 |
| LMArena Creative Writing | — | 1454 |
| Short-Story Creative Writing | — | 83.8% |
| EQ-Bench Creative Writing | — | 1421 |
| WildBench | — | 85.7% |
| LMArena Multi-Turn | — | 1453 |
| LiveBench Language | — | 67.8% |
Frequently asked questions
Is Claude Haiku 5.5 better than Gemini 2.5 Pro?
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 45.0 on the Noometry Index.
Which is cheaper, Claude Haiku 5.5 or Gemini 2.5 Pro?
Claude Haiku 5.5 is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; Gemini 2.5 Pro lists at $1.25 and $10.
Is Claude Haiku 5.5 or Gemini 2.5 Pro better for coding?
Claude Haiku 5.5 scores higher on coding benchmarks: 49.2 versus 42.4 in the Noometry coding category.
Which has the bigger context window?
Gemini 2.5 Pro does, with 1.05M tokens against 1M.
How many benchmarks do Claude Haiku 5.5 and Gemini 2.5 Pro share?
5 benchmarks have published results for both models. Claude Haiku 5.5 has 9 scored results on Noometry and Gemini 2.5 Pro has 78.