Model comparison
Claude 2 vs Claude Haiku 5.5
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 25.0 on the Noometry Index.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. Claude 2 scores higher in 0 categories and Claude Haiku 5.5 in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 9.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 2 and 98.9% for Claude Haiku 5.5.
Side by side
| Claude 2 | Claude Haiku 5.5 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 25.0 | 49.5 |
| Released | 2023-07-11 | 2026-10-07 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 128K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.50 |
| Results tracked | 8 | 9 |
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Category by category
Coding Not comparable
Claude 2: —, Claude Haiku 5.5: 49.2 (#50)
| Benchmark | Claude 2 | Claude Haiku 5.5 |
|---|---|---|
| LMArena WebDev | — | 1587 |
| HumanEval+ | 61.6% | — |
Reasoning Claude Haiku 5.5 leads
Claude 2: 21.7 (#216), Claude Haiku 5.5: 35.2 (#69)
| Benchmark | Claude 2 | Claude Haiku 5.5 |
|---|---|---|
| NYT Connections (extended) | — | 65.7% |
| Mystery Game Puzzles | — | 30% |
| DTBench | 51.9% | — |
| Epoch Capabilities Index | 120.13 | — |
Math Claude Haiku 5.5 leads
Claude 2: 9.3 (#320), Claude Haiku 5.5: 73.6 (#18)
| Benchmark | Claude 2 | Claude Haiku 5.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 98.9% |
| FrontierMath (Tiers 1-3) | — | 75.1% |
| FrontierMath Tier 4 | — | 46.3% |
| MATH Level 5 | 11.7% | — |
Knowledge Claude Haiku 5.5 leads
Claude 2: 16.9 (#287), Claude Haiku 5.5: 50.8 (#70)
| Benchmark | Claude 2 | Claude Haiku 5.5 |
|---|---|---|
| GPQA Diamond | 34.7% | 89.6% |
| SimpleQA Verified | — | 23.8% |
| MMLU | 78.5% | — |
| TriviaQA | 87.5% | — |
Multimodal Not comparable
Claude 2: —, Claude Haiku 5.5: 43.7 (#21)
| Benchmark | Claude 2 | Claude Haiku 5.5 |
|---|---|---|
| Furniture Assembly | — | 47.5% |
Frequently asked questions
Is Claude 2 better than Claude Haiku 5.5?
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 25.0 on the Noometry Index.
How many benchmarks do Claude 2 and Claude Haiku 5.5 share?
2 benchmarks have published results for both models. Claude 2 has 8 scored results on Noometry and Claude Haiku 5.5 has 9.