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Claude Opus 4.5 vs Gemini 2.5 Pro
Comprehensive side-by-side LLM comparison
Claude Opus 4.5 leads with 14.9% higher average benchmark score. Gemini 2.5 Pro offers 744.2K more tokens in context window than Claude Opus 4.5. Gemini 2.5 Pro is $18.75 cheaper per million tokens. Overall, Claude Opus 4.5 is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4.5, released by Anthropic in November 2025, is a large language model from the Claude 4.5 family built for demanding reasoning tasks, advanced code generation, and complex agentic workflows. It features a 200K token context window, 64K maximum output tokens, native image understanding, and extended thinking with configurable effort levels. Opus 4.5 targets deep analytical work, multi-step tool orchestration, and applications requiring sustained reasoning across long, complex tasks.
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Google DeepMind
Gemini 2.5 Pro, released by Google in May 2025, is a large language model from the Gemini 2.5 family designed for complex reasoning, coding, and long-context analysis tasks. It features a 1M token context window, native support for text, image, video, and audio input, and integrated thinking capabilities for multi-step problem solving. Gemini 2.5 Pro targets advanced coding workflows, scientific reasoning, and applications requiring deep understanding across large, mixed-modality contexts.
5 months newer
Gemini 2.5 Pro
Google DeepMind
2025-05-20
Claude Opus 4.5
Anthropic
2025-11-01
Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.5
Input:$5.00
Output:$25.00
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Gemini 2.5 Pro
Input:$1.25
Output:$10.00($18.75 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 6 common benchmarks
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Claude Opus 4.5
Average Score:48.7%(+14.9%)
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Gemini 2.5 Pro
Average Score:33.8%
Performance comparison across key benchmark categories
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Claude Opus 4.5
Science87.0%(+9.8%)
Tool Use62.3%(+53.5%)
Agents56.6%(+41.1%)
Reasoning30.8%(+13.0%)
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.5
2025-05
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 Opus 4.5
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Gemini 2.5 Pro
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Claude Opus 4.5
Avg Score:48.7%(+14.9%)
Providers:3
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Gemini 2.5 Pro
Avg Score:33.8%
Providers:2