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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 7.2% higher average benchmark score. 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, released by Anthropic in October 2025, is a fast, efficient large language model from the Claude 4.5 family optimized for high-throughput, low-latency workloads. It features a 200K token context window, 64K maximum output tokens, native image understanding, and extended thinking capabilities. Haiku 4.5 targets latency-sensitive applications such as real-time assistants, document classification, and lightweight agentic tasks where rapid response times are a primary requirement.
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Anthropic
Claude Sonnet 4.5, released by Anthropic in September 2025, is a large language model from the Claude 4.5 family that balances response quality and efficiency for coding, agentic tasks, and analytical work. It features a 200K token context window (extendable to 1M tokens in beta), 64K maximum output tokens, native image understanding, and extended thinking support. Sonnet 4.5 targets use cases that require a balance of throughput and reasoning depth, including code generation, data analysis, and multi-step agentic pipelines.
2 days newer
Claude Sonnet 4.5
Anthropic
2025-09-29
Claude Haiku 4.5
Anthropic
2025-10-01
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 2 common benchmarks
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Claude Haiku 4.5
Average Score:73.2%
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Claude Sonnet 4.5
Average Score:80.3%(+7.2%)
Performance comparison across key benchmark categories
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Claude Haiku 4.5
Science73.0%
Coding73.3%
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Claude Sonnet 4.5
Science
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Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4.5
2025-01
Claude Haiku 4.5
2025-02
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
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Claude Sonnet 4.5
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Claude Haiku 4.5
Avg Score:73.2%
Providers:3
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Claude Sonnet 4.5
Avg Score:80.3%(+7.2%)
Providers:3