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Claude Sonnet 4 vs GPT-4.5
Comprehensive side-by-side LLM comparison
Claude Sonnet 4 leads with 10.5% higher average benchmark score. Claude Sonnet 4 offers 195.9K more tokens in context window than GPT-4.5. Claude Sonnet 4 is $207.00 cheaper per million tokens. Claude Sonnet 4 is available on 4 providers. Overall, Claude Sonnet 4 is the stronger choice for coding tasks.
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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.
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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.
2 months newer
GPT-4.5
OpenAI
2025-02-27
Claude Sonnet 4
Anthropic
2025-05-22
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Pricing Comparison
Cost per million tokens (USD)
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Claude Sonnet 4
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 6 common benchmarks
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Claude Sonnet 4
Average Score:74.9%(+10.5%)
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GPT-4.5
Average Score:64.4%
Performance comparison across key benchmark categories
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Claude Sonnet 4
Coding72.7%(+34.7%)
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GPT-4.5
Coding38.0%
Provider Availability & Performance
Available providers and their performance metrics
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Claude Sonnet 4
4 providers
Anthropic
Throughput: 42 tok/s
Latency: 0.4ms
Bedrock
Throughput: 101 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
ZeroEval
Throughput: 42 tok/s
Latency: 0.4ms
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Claude Sonnet 4
Avg Score:74.9%(+10.5%)
Providers:4
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GPT-4.5
Avg Score:64.4%
Providers:1