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GPT-4o vs GPT-5.1
Comprehensive side-by-side LLM comparison
GPT-5.1 leads with 34.7% higher average benchmark score. Overall, GPT-5.1 is the stronger choice for coding tasks.
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OpenAI
GPT-4o, released by OpenAI in May 2024, is a multimodal large language model from the GPT-4 family that natively processes text, image, and audio inputs in a single end-to-end model. It features a 128K token context window and demonstrated competitive performance across coding, reasoning, and vision benchmarks at its release. GPT-4o targets general-purpose assistant applications, vision-enabled workflows, and use cases requiring low-latency multimodal understanding.
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OpenAI
GPT-5.1, released by OpenAI in November 2025, is a large language model from the GPT-5 family that delivers incremental improvements in reasoning, instruction following, and multimodal understanding over GPT-5. It features a 400K token context window and targets general-purpose development, long-context analysis, and agentic workflows.
1 year newer
GPT-4o
OpenAI
2024-05-13
GPT-5.1
OpenAI
2025-11
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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GPT-4o
Average Score:31.6%
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GPT-5.1
Average Score:66.3%(+34.7%)
Performance comparison across key benchmark categories
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GPT-4o
Science56.1%
Tool Use7.2%
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GPT-5.1
Science
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Knowledge Cutoff
Training data recency comparison
GPT-4o
2024-04
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4o
1 providers
OpenAI
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GPT-5.1
0 providers
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GPT-4o
Avg Score:31.6%
Providers:1
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GPT-5.1
Avg Score:66.3%(+34.7%)
Providers:0