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Claude Haiku 4.5 vs Claude Sonnet 4
Comprehensive side-by-side LLM comparison
Claude Haiku 4.5 leads with 5.2% higher average benchmark score. Claude Haiku 4.5 offers 72.0K more tokens in context window than Claude Sonnet 4. Claude Haiku 4.5 is $12.00 cheaper per million tokens. Claude Sonnet 4 is available on 4 providers. Overall, Claude Haiku 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 was created as the balanced offering in the Claude 4 family, designed to provide strong intelligence with practical speed and cost efficiency. Built to serve as a versatile workhorse for diverse applications, it balances advanced capabilities with operational considerations for everyday enterprise and consumer use.
4 months newer
Claude Sonnet 4
Anthropic
2025-05-22
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
Input:$3.00
Output:$15.00
Performance Metrics
Context window and performance specifications
Average performance across 5 common benchmarks
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Claude Haiku 4.5
Average Score:73.3%(+5.2%)
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Claude Sonnet 4
Average Score:68.1%
Performance comparison across key benchmark categories
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Claude Haiku 4.5
Coding73.3%(+0.6%)
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Claude Sonnet 4
Coding72.7%
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Knowledge Cutoff
Training data recency comparison
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
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Claude Haiku 4.5
Avg Score:73.3%(+5.2%)
Providers:1
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Claude Sonnet 4
Avg Score:68.1%
Providers:4