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Claude Sonnet 4.5 vs Gemini 3 Pro
Comprehensive side-by-side LLM comparison
Gemini 3 Pro leads with 6.1% higher average benchmark score. Gemini 3 Pro offers 744.2K more tokens in context window than Claude Sonnet 4.5. Claude Sonnet 4.5 is $4.50 cheaper per million tokens. Overall, Gemini 3 Pro is the stronger choice for coding tasks.
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Anthropic
Claude Sonnet 4.5, released by Anthropic in September 2025, is a large language model from the Claude 4.5 family that balances response quality and efficiency for coding, agentic tasks, and analytical work. It features a 200K token context window (extendable to 1M tokens in beta), 64K maximum output tokens, native image understanding, and extended thinking support. Sonnet 4.5 targets use cases that require a balance of throughput and reasoning depth, including code generation, data analysis, and multi-step agentic pipelines.
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Google DeepMind
Gemini 3 Pro, released by Google in November 2025, is a large language model from the Gemini 3 family designed for complex reasoning, broad world knowledge, and multi-step problem solving. It features a 1M token context window, 64K maximum output tokens, and native multimodal input including text, images, audio, and video. Gemini 3 Pro targets research-grade reasoning, advanced data analysis, and applications requiring comprehensive understanding across diverse input formats.
1 month newer
Claude Sonnet 4.5
Anthropic
2025-09-29
Gemini 3 Pro
Google DeepMind
2025-11-18
Pricing Comparison
Cost per million tokens (USD)
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Claude Sonnet 4.5
Input:$3.00
Output:$15.00($4.50 cheaper)
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Gemini 3 Pro
Input:$2.50
Output:$20.00
Performance Metrics
Context window and performance specifications
Average performance across 17 common benchmarks
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Claude Sonnet 4.5
Average Score:58.5%
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Gemini 3 Pro
Average Score:64.6%(+6.1%)
Performance comparison across key benchmark categories
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Claude Sonnet 4.5
Science83.4%
Knowledge89.5%
Multimodal63.4%
Agents69.8%
Coding58.4%
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Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4.5
2025-01
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
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Gemini 3 Pro
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Claude Sonnet 4.5
Avg Score:58.5%
Providers:3
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Gemini 3 Pro
Avg Score:64.6%(+6.1%)
Providers:2