GPT-4.5

GPT-4.5

GPT-4.5 is a step forward in scaling up pre-training and post-training. With broader knowledge, improved intent understanding, and greater 'EQ', it excels at natural conversations, writing, programming, and practical problem solving with reduced hallucinations. GPT-4.5 achieved 62.5% accuracy on SimpleQA and a 37.1% hallucination rate, significantly outperforming GPT-4o and other models.

ConversationReasoningCode GenerationAnalysisSummarization
Provider
Openai
Release Date
February 27, 2025
Size
XLARGE
Parameters
Not disclosed

Benchmark Performance

Performance metrics on industry standard AI benchmarks that measure capabilities across reasoning, knowledge, and specialized tasks.

MMLU

90.8%
Source:github.com

MATH

87.1%
Source:github.com

GPQA

69.5%
Source:github.com

SimpleQA

62.5%
Source:github.com

Model Insights

All Model Responses

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