+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
Claude 3.5 Haiku vs Claude Sonnet 4.5
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 40.2% higher average benchmark score. Claude 3.5 Haiku offers 136.0K more tokens in context window than Claude Sonnet 4.5. Claude 3.5 Haiku is $13.20 cheaper per million tokens. Claude Sonnet 4.5 supports multimodal inputs. Overall, Claude Sonnet 4.5 is the stronger choice for coding tasks.
+
+
+
+
Anthropic
Claude 3.5 Haiku was developed as the next generation of Anthropic's fastest model, offering similar speed to Claude 3 Haiku while surpassing Claude 3 Opus on many intelligence benchmarks. Built with low latency, improved instruction following, and accurate tool use, it serves user-facing products, specialized sub-agent tasks, and data-heavy applications.
+
+
+
+
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.
11 months newer
Claude 3.5 Haiku
Anthropic
2024-10-22
Claude Sonnet 4.5
Anthropic
2025-09-29
+
+
+
+
+
+
+
+
+
+
+
+
Pricing Comparison
Cost per million tokens (USD)
+
+
+
+
Claude 3.5 Haiku
Input:$0.80
Output:$4.00($13.20 cheaper)
+
+
+
+
Claude Sonnet 4.5
Input:$3.00
Output:$15.00
Performance Metrics
Context window and performance specifications
Average performance across 4 common benchmarks
+
+
+
+
Claude 3.5 Haiku
Average Score:39.0%
+
+
+
+
Claude Sonnet 4.5
Average Score:79.2%(+40.2%)
Performance comparison across key benchmark categories
+
+
+
+
Claude 3.5 Haiku
Coding40.6%
+
+
+
+
Claude Sonnet 4.5
Coding77.2%(+36.6%)
+
+
+
+
Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4.5
2025-01-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
Claude 3.5 Haiku
3 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.3ms
Bedrock
Throughput: 104 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
+
+
+
+
+
+
+
Claude 3.5 Haiku
Avg Score:39.0%
Providers:3
+
+
+
+
Claude Sonnet 4.5
Avg Score:79.2%(+40.2%)
Providers:2