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Claude Sonnet 4.5 vs Grok-2
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 4.4% higher average benchmark score. Claude Sonnet 4.5 offers 128.0K more tokens in context window than Grok-2. Grok-2 is $6.00 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
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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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xAI
Grok-2 is a multimodal language model developed by xAI. It achieves strong performance with an average score of 76.5% across 8 benchmarks. It excels particularly in DocVQA (93.6%), HumanEval (88.4%), MMLU (87.5%). It supports a 136K token context window for handling large documents. 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 xAI's latest advancement in AI technology.
1 year newer
Grok-2
xAI
2024-08-13
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
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Grok-2
Input:$2.00
Output:$10.00($6.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 16 common benchmarks
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Claude Sonnet 4.5
Average Score:42.6%(+4.4%)
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Grok-2
Average Score:38.3%
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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 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:42.6%(+4.4%)
Providers:2
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Grok-2
Avg Score:38.3%
Providers:1