GPT-5 is faster, smarter, and more capable than GPT-4, featuring enhanced reasoning, fewer hallucinations, superior writing and coding abilities, and stronger performance on academic and multimodal benchmarks. It uses a larger model size potentially exceeding 500 billion parameters, improved training techniques, more comprehensive multilingual support, and energy efficiency compared to GPT-4.

GPT-5 demonstrates superior performance in academic benchmarks including 94.6% accuracy on the AIME 2025 math test without tools and 84.2% accuracy on the MMMU visual problem-solving test. For coding tasks, it achieves 74.9% accuracy on the SWE-bench Verified benchmark and 88% on the Aider Polyglot multi-language code editing benchmark, outperforming previous models significantly.

No, OpenAI acknowledges that GPT-5 has not yet achieved Artificial General Intelligence (AGI) and still does not fully master true human-level tasks, despite its advanced capabilities and PhD-level intelligence in specific domains.

GPT-5 excels in practical applications such as coding, creative writing, website building, and multimodal understanding, including reasoning over images, videos, and scientific data. It effectively handles complex, multi-step tasks, instruction following, and agentic tool use across diverse fields including law, logistics, sales, and engineering.

GPT-5 is the most reliable and safe OpenAI model yet, with the lowest hallucination and error rates on health-related and other benchmarks. Its error rates drop significantly when using the 'thinking' mode, maintaining under 1% hallucination on open-source prompts and only 1.6% on difficult medical cases, outperforming models like GPT-4o and OpenAI o3.

Vellum.ai - GPT-5 Benchmarks