Model comparison
Claude 3 Haiku vs Mercury 2.5
Claude 3 Haiku has enough public results to be ranked (#333); Mercury 2.5 does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where Mercury 2.5 leads 22.4 to 9.2.
Side by side
| Claude 3 Haiku | Mercury 2.5 | |
|---|---|---|
| Provider | Anthropic | Inception |
| Noometry Index | 25.7 | 30.2 |
| Released | 2024-03-07 | 2026-09-08 |
| Weights | Proprietary | Proprietary |
| Context window | — | 260K |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.04 |
| Output $ / M tokens | — | $0.15 |
| Results tracked | 37 | 2 |
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Category by category
Coding Not comparable
Claude 3 Haiku: 26.1 (#320), Mercury 2.5: —
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| WeirdML | 9.8% | — |
| BigCodeBench Instruct | 39.4% | — |
| LMArena Coding | 1199 | — |
| BigCodeBench Complete | 50.1% | — |
| CadEval | 12% | — |
| ALE-Bench | — | 301.65 |
| HumanEval+ | 68.9% | — |
| MBPP+ | 68.8% | — |
Reasoning Not comparable
Claude 3 Haiku: 15.7 (#303), Mercury 2.5: —
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| Kagi LLM Benchmark | 34.2% | — |
| LMArena Hard Prompts | 1174 | — |
| DTBench | 50.1% | — |
| LMCA | 8.8% | — |
| Epoch Capabilities Index | 118.3 | — |
| ForecastBench | 53.2 | — |
| WinoGrande | 74.2% | — |
Math Mercury 2.5 leads
Claude 3 Haiku: 9.2 (#313), Mercury 2.5: 22.4
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.8% | — |
| ProofBench | — | 3% |
| LMArena Math | 1188 | — |
| MATH Level 5 | 14.9% | — |
Knowledge Not comparable
Claude 3 Haiku: 17.3 (#280), Mercury 2.5: —
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| GPQA Diamond | 36.3% | — |
| Confabulations | 34.2% | — |
| LMArena Expert | 1148 | — |
| MMLU | 73.8% | — |
Multimodal Not comparable
Claude 3 Haiku: 23.1 (#123), Mercury 2.5: —
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| LMArena Vision | 950 | — |
| ScienceQA | 72% | — |
Multilingual Not comparable
Claude 3 Haiku: 36.1 (#238), Mercury 2.5: —
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1178 | — |
| LMArena Chinese | 1155 | — |
| LMArena French | 1194 | — |
| LMArena German | 1174 | — |
| LMArena Japanese | 1102 | — |
| LMArena Korean | 1108 | — |
| LMArena Russian | 1204 | — |
| LMArena Spanish | 1165 | — |
Instruction Following Not comparable
Claude 3 Haiku: 61.5 (#242), Mercury 2.5: —
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| LMArena Instruction Following | 1174 | — |
Long Context Not comparable
Claude 3 Haiku: 36.1 (#232), Mercury 2.5: —
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| LMArena Longer Query | 1191 | — |
Writing & Preference Not comparable
Claude 3 Haiku: 29.8 (#286), Mercury 2.5: —
| Benchmark | Claude 3 Haiku | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1195 | — |
| LMArena Creative Writing | 1157 | — |
| EQ-Bench Creative Writing | 717 | — |
| LMArena Multi-Turn | 1190 | — |
Frequently asked questions
Is Claude 3 Haiku better than Mercury 2.5?
Claude 3 Haiku has enough public results to be ranked (#333); Mercury 2.5 does not yet, so treat this comparison as directional.
How many benchmarks do Claude 3 Haiku and Mercury 2.5 share?
0 benchmarks have published results for both models. Claude 3 Haiku has 37 scored results on Noometry and Mercury 2.5 has 2.