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Claude Sonnet 4.5 vs GPT-5
Comprehensive side-by-side LLM comparison
GPT-5 leads with 43.2% higher average benchmark score. GPT-5 offers 264.0K more tokens in context window than Claude Sonnet 4.5. GPT-5 is $6.75 cheaper per million tokens. Overall, GPT-5 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-5 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 70.1% across 35 benchmarks. It excels particularly in SWE-Lancer (IC-Diamond subset) (100.0%), COLLIE (99.0%), Tau2 Telecom (96.7%). It supports a 528K 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 OpenAI's latest advancement in AI technology.
1 month newer
GPT-5
OpenAI
2025-08-07
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
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GPT-5
Input:$1.25
Output:$10.00($6.75 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 41 common benchmarks
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Claude Sonnet 4.5
Average Score:16.6%
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GPT-5
Average Score:59.8%(+43.2%)
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Knowledge Cutoff
Training data recency comparison
GPT-5
2024-09-30
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:16.6%
Providers:2
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GPT-5
Avg Score:59.8%(+43.2%)
Providers:2