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Claude 3.5 Sonnet vs GPT-4.5
Comprehensive side-by-side LLM comparison
Both models show comparable benchmark performance. Claude 3.5 Sonnet offers 267.9K more tokens in context window than GPT-4.5. Claude 3.5 Sonnet is $207.00 cheaper per million tokens. Claude 3.5 Sonnet is available on 3 providers. Both models have their strengths depending on your specific coding needs.
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Anthropic
This upgraded version of Claude 3.5 Sonnet was released with significant improvements in coding and agentic tool use. Built to deliver enhanced performance in software engineering tasks, it brought substantial gains in reasoning and problem-solving while introducing the groundbreaking computer use capability in public beta, allowing it to interact with computer interfaces like a human.
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OpenAI
GPT-4.5 was developed as an intermediate advancement between GPT-4 and GPT-5, designed to incorporate incremental improvements in reasoning, factuality, and instruction-following. Built to bridge generational capabilities while maintaining compatibility with existing applications, it represents a refinement of the GPT-4 architecture with enhanced performance characteristics.
4 months newer
Claude 3.5 Sonnet
Anthropic
2024-10-22
GPT-4.5
OpenAI
2025-02-27
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Pricing Comparison
Cost per million tokens (USD)
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Claude 3.5 Sonnet
Input:$3.00
Output:$15.00($207.00 cheaper)
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GPT-4.5
Input:$75.00
Output:$150.00
Performance Metrics
Context window and performance specifications
Average performance across 9 common benchmarks
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Claude 3.5 Sonnet
Average Score:72.0%
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GPT-4.5
Average Score:72.1%(+0.1%)
Performance comparison across key benchmark categories
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Claude 3.5 Sonnet
Coding49.0%(+11.0%)
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GPT-4.5
Coding38.0%
Provider Availability & Performance
Available providers and their performance metrics
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Claude 3.5 Sonnet
3 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 101 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
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Claude 3.5 Sonnet
Avg Score:72.0%
Providers:3
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GPT-4.5
Avg Score:72.1%(+0.1%)
Providers:1