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Claude Sonnet 4.5 vs GPT-4
Comprehensive side-by-side LLM comparison
GPT-4 leads with 12.5% higher average benchmark score. Claude Sonnet 4.5 offers 198.5K more tokens in context window than GPT-4. Claude Sonnet 4.5 is $72.00 cheaper per million tokens. Overall, GPT-4 is the stronger choice for coding tasks.
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Anthropic
Claude Sonnet 4.5 is a multimodal language model developed by Anthropic. It achieves strong performance with an average score of 75.8% across 9 benchmarks. It excels particularly in MMMLU (89.1%), AIME 2025 (87.0%), TAU-bench Retail (86.2%). It supports a 264K token context window for handling large documents. The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents Anthropic's latest advancement in AI technology.
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OpenAI
GPT-4 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 77.7% across 12 benchmarks. It excels particularly in AI2 Reasoning Challenge (ARC) (96.3%), HellaSwag (95.3%), Uniform Bar Exam (90.0%). The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly.
2 years newer
GPT-4
OpenAI
2023-06-13
Claude Sonnet 4.5
Anthropic
2025-09-29
Pricing Comparison
Cost per million tokens (USD)
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Claude Sonnet 4.5
Input:$3.00
Output:$15.00($72.00 cheaper)
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GPT-4
Input:$30.00
Output:$60.00
Performance Metrics
Context window and performance specifications
Average performance across 20 common benchmarks
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Claude Sonnet 4.5
Average Score:34.1%
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GPT-4
Average Score:46.6%(+12.5%)
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Knowledge Cutoff
Training data recency comparison
GPT-4
2022-12-31
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
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Claude Sonnet 4.5
2 providers
Anthropic
Throughput: 42 tok/s
Latency: 0.4ms
ZeroEval
Throughput: 42 tok/s
Latency: 0.4ms
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Claude Sonnet 4.5
Avg Score:34.1%
Providers:2
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GPT-4
Avg Score:46.6%(+12.5%)
Providers:2