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Claude Sonnet 4.5 vs Gemini 1.5 Pro
Comprehensive side-by-side LLM comparison
Gemini 1.5 Pro leads with 31.8% higher average benchmark score. Gemini 1.5 Pro offers 1.8M more tokens in context window than Claude Sonnet 4.5. Gemini 1.5 Pro is $5.50 cheaper per million tokens. Overall, Gemini 1.5 Pro 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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Gemini 1.5 Pro is a multimodal language model developed by Google. It achieves strong performance with an average score of 72.6% across 23 benchmarks. It excels particularly in XSTest (98.8%), HellaSwag (93.3%), GSM8k (90.8%). With a 2.1M token context window, it can handle extensive documents and complex multi-turn conversations. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2024, it represents Google's latest advancement in AI technology.
1 year newer
Gemini 1.5 Pro
2024-05-01
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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Gemini 1.5 Pro
Input:$2.50
Output:$10.00($5.50 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 31 common benchmarks
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Claude Sonnet 4.5
Average Score:22.0%
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Gemini 1.5 Pro
Average Score:53.8%(+31.8%)
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Knowledge Cutoff
Training data recency comparison
Gemini 1.5 Pro
2023-11-01
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:22.0%
Providers:2
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Gemini 1.5 Pro
Avg Score:53.8%(+31.8%)
Providers:1