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Claude Haiku 4.5 vs Claude Sonnet 4.5
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 5.1% higher average benchmark score. Claude Haiku 4.5 offers 136.0K more tokens in context window than Claude Sonnet 4.5. Claude Haiku 4.5 is $12.00 cheaper per million tokens. Overall, Claude Sonnet 4.5 is the stronger choice for coding tasks.
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Anthropic
Claude Haiku 4.5 continues Anthropic's tradition of fast, efficient models in the fourth generation Claude family. Designed to maintain the hallmark speed and cost-effectiveness of the Haiku line while incorporating advancements from the Claude 4 series, it serves applications requiring rapid processing and quick turnaround times.
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Anthropic
Claude Sonnet 4.5 was developed to bridge human thinking and machine assistance, allowing people to work with language and tools in a more conversational and natural way. Built with a focus on turning ideas into results, it represents an evolution in making AI feel less mechanical while maintaining strong capabilities across reasoning, coding, and collaborative tasks.
16 days newer
Claude Sonnet 4.5
Anthropic
2025-09-29
Claude Haiku 4.5
Anthropic
2025-10-15
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Pricing Comparison
Cost per million tokens (USD)
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Claude Haiku 4.5
Input:$1.00
Output:$5.00($12.00 cheaper)
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Claude Sonnet 4.5
Input:$3.00
Output:$15.00
Performance Metrics
Context window and performance specifications
Average performance across 6 common benchmarks
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Claude Haiku 4.5
Average Score:69.5%
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Claude Sonnet 4.5
Average Score:74.7%(+5.1%)
Performance comparison across key benchmark categories
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Claude Haiku 4.5
Coding73.3%
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Claude Sonnet 4.5
Coding77.2%(+3.9%)
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Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4.5
2025-01-31
Claude Haiku 4.5
2025-02-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Haiku 4.5
1 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.3ms
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Claude Sonnet 4.5
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Claude Haiku 4.5
Avg Score:69.5%
Providers:1
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Claude Sonnet 4.5
Avg Score:74.7%(+5.1%)
Providers:2