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GPT-5 Mini vs GPT-5.1 Thinking
Comprehensive side-by-side LLM comparison
GPT-5.1 Thinking leads with 4.2% higher average benchmark score. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-5 mini, released by OpenAI in August 2025, is a smaller variant from the GPT-5 family that inherits GPT-5's unified reasoning architecture and multimodal capabilities at a reduced inference cost. It targets high-volume production use cases requiring a balance of intelligence and response speed, offering GPT-5 capabilities for applications where full GPT-5 inference costs are a concern.
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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.
3 months newer
GPT-5 Mini
OpenAI
2025-08
GPT-5.1 Thinking
OpenAI
2025-11
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-5 Mini
Average Score:19.4%
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GPT-5.1 Thinking
Average Score:23.7%(+4.2%)
Performance comparison across key benchmark categories
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GPT-5 Mini
Reasoning19.4%
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GPT-5.1 Thinking
Reasoning23.7%(+4.2%)
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5 Mini
1 providers
OpenAI
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GPT-5.1 Thinking
0 providers
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GPT-5 Mini
Avg Score:19.4%
Providers:1
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GPT-5.1 Thinking
Avg Score:23.7%(+4.2%)
Providers:0