Anthropic's top-tier model ranking ECI 141. competitive on reasoning and coding tasks. strong intelligence. Released Oct 2025. API access.
Metrics
Performance
ECI Score140.559
Epoch Capabilities Index score
ECI Normalized88
Normalized ECI score (0-100)
Training Computenull
Total compute used during training
Info
ProviderAnthropic
Organization that created the model
CountryUSA
Model development country
Model AccessibilityAPI access
Access method (API, download, etc.)
Open WeightsNo
Model weights publicly available
Epoch Model IDclaude-haiku-4-5-20251001_32K
Epoch AI benchmark identifier
Other
Release DateOct 15, 2025
Score Breakdown
code
20%75
Code generation, understanding, and debugging
math
20%79
Mathematical reasoning and problem solving
reasoning
15%84
Multi-step logical reasoning
intelligence
30%88
Overall reasoning and task completion ability
instruction following
79
Compatibility(4)
Sources(1)
Developed by
AnthropicBenchmark Performance
Compare ModelsEpoch Capabilities Index
140.6/ 155
| Dimension | Score |
|---|---|
| Intelligence | 88.0 |
| Reasoning | 84.0 |
| Math | 79.0 |
| Code | 75.0 |
| Instruction Following | 79.0 |
| Overall | 88 |
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Data: Epoch AI (CC-BY 4.0)