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Gemini 2.5 Pro vs GPT-5.1 Thinking
Comprehensive side-by-side LLM comparison
GPT-5.1 Thinking leads with 5.9% higher average benchmark score. Gemini 2.5 Pro is available on 2 providers. Overall, GPT-5.1 Thinking is the stronger choice for coding 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.
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OpenAI
GPT-5.1 Thinking, released by OpenAI in November 2025, is an extended reasoning variant from the GPT-5.1 family that applies chain-of-thought processing to improve accuracy on complex reasoning, mathematics, and coding tasks. It targets analytical workflows where deliberate reasoning over a problem significantly improves output quality.
5 months newer
Gemini 2.5 Pro
Google DeepMind
2025-05-20
GPT-5.1 Thinking
OpenAI
2025-11
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Gemini 2.5 Pro
Average Score:17.8%
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GPT-5.1 Thinking
Average Score:23.7%(+5.9%)
Performance comparison across key benchmark categories
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Gemini 2.5 Pro
Reasoning17.8%
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GPT-5.1 Thinking
Reasoning23.7%(+5.9%)
Provider Availability & Performance
Available providers and their performance metrics
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Gemini 2.5 Pro
2 providers
Google Cloud Vertex AI
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GPT-5.1 Thinking
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Gemini 2.5 Pro
Avg Score:17.8%
Providers:2
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GPT-5.1 Thinking
Avg Score:23.7%(+5.9%)
Providers:0