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Claude 3 Opus vs Claude Sonnet 4.5
Comprehensive side-by-side LLM comparison
Claude 3 Opus leads with 11.4% higher average benchmark score. Claude 3 Opus offers 136.0K more tokens in context window than Claude Sonnet 4.5. Claude Sonnet 4.5 is $72.00 cheaper per million tokens. Overall, Claude 3 Opus is the stronger choice for coding tasks.
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Anthropic
Claude 3 Opus is a multimodal language model developed by Anthropic. This model demonstrates exceptional performance with an average score of 81.6% across 11 benchmarks. It excels particularly in ARC-C (96.4%), HellaSwag (95.4%), GSM8k (95.0%). It supports a 400K token context window for handling large documents. The model is available through 3 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2024, it represents Anthropic's latest advancement in AI technology.
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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.
1 year newer
Claude 3 Opus
Anthropic
2024-02-29
Claude Sonnet 4.5
Anthropic
2025-09-29
Pricing Comparison
Cost per million tokens (USD)
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Claude 3 Opus
Input:$15.00
Output:$75.00
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Claude Sonnet 4.5
Input:$3.00
Output:$15.00($72.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 19 common benchmarks
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Claude 3 Opus
Average Score:47.3%(+11.4%)
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Claude Sonnet 4.5
Average Score:35.9%
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Knowledge Cutoff
Training data recency comparison
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 3 Opus
3 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 120 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
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Claude 3 Opus
Avg Score:47.3%(+11.4%)
Providers:3
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Claude Sonnet 4.5
Avg Score:35.9%
Providers:2