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Gemini 3 Flash vs GPT-5.1 Thinking
Comprehensive side-by-side LLM comparison
Gemini 3 Flash leads with 1.7% higher average benchmark score. Gemini 3 Flash is available on 2 providers. Both models have their strengths depending on your specific coding needs.
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Google DeepMind
Gemini 3 Flash, released by Google in December 2025, is a large language model from the Gemini 3 family that delivers reasoning and coding performance with efficiency optimized for high-volume workloads. It features a 1M token context window, 64K maximum output tokens, and native support for text, image, audio, video, and PDF input. Gemini 3 Flash targets cost-sensitive agentic workflows, document processing, and production APIs requiring fast, capable multimodal responses.
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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.
1 month newer
GPT-5.1 Thinking
OpenAI
2025-11
Gemini 3 Flash
Google DeepMind
2025-12-17
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Gemini 3 Flash
Average Score:78.0%(+1.7%)
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GPT-5.1 Thinking
Average Score:76.3%
Performance comparison across key benchmark categories
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Gemini 3 Flash
Coding78.0%(+1.7%)
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GPT-5.1 Thinking
Coding76.3%
Provider Availability & Performance
Available providers and their performance metrics
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Gemini 3 Flash
2 providers
Google Cloud Vertex AI
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GPT-5.1 Thinking
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Gemini 3 Flash
Avg Score:78.0%(+1.7%)
Providers:2
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GPT-5.1 Thinking
Avg Score:76.3%
Providers:0