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Claude Opus 4.5 vs GPT-5.2
Comprehensive side-by-side LLM comparison
GPT-5.2 leads with 2.3% higher average benchmark score. Claude Opus 4.5 is available on 3 providers. Both models have their strengths depending on your specific coding needs.
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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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OpenAI
GPT-5.2, released by OpenAI on December 11, 2025, is a large language model from the GPT-5 family that improves on GPT-5 in general intelligence, long-context understanding, agentic tool-calling, and vision. It features a 400K token context window, 128K maximum output tokens, and a knowledge cutoff of August 2025. GPT-5.2 targets long-context coding tasks, extended document analysis, and complex agentic workflows requiring reliable instruction following.
1 month newer
Claude Opus 4.5
Anthropic
2025-11-01
GPT-5.2
OpenAI
2025-12-11
Performance Metrics
Context window and performance specifications
Average performance across 18 common benchmarks
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Claude Opus 4.5
Average Score:65.4%
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GPT-5.2
Average Score:67.7%(+2.3%)
Performance comparison across key benchmark categories
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Claude Opus 4.5
Science87.0%
Knowledge90.8%(+1.2%)
Multimodal72.3%
Agents72.9%(+3.0%)
Coding61.5%
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.5
2025-05
GPT-5.2
2025-08
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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GPT-5.2
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Claude Opus 4.5
Avg Score:65.4%
Providers:3
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GPT-5.2
Avg Score:67.7%(+2.3%)
Providers:0