On August 7th, local time, OpenAI released GPT-5, marking a new era for large language models. It now forms a three-way competition with Anthropic's Claude4Opus and Google's Gemini2.5Pro. So, which is the most powerful AI? GPT-5 vs. Claude4Opus vs. Gemini2.5Pro? Let's analyze the results below.
In terms of core performance, GPT-5 leads in programming (SWE-bench 74.9%), mathematical reasoning (AIME2025 94.6%), and multimodal processing (MMMU 84.2%), earning it the accolade of "doctoral-level expertise" from experts. Claude4Opus follows closely behind with a programming score of 72.5%, particularly excelling in solving complex codebase problems, such as helping developers fix a "white whale" bug that had plagued developers for four years. However, its mathematical capabilities are weaker (AIME 33.9%). Gemini 2.5 Pro, with its 1 million token context window, is the top choice for long document processing. In scientific research scenarios, it can quickly analyze 60,000-word documents and generate structured reports, but its programming capabilities (63.8%) are slightly lower.
In terms of features, the three models each have their own strengths. GPT-5 utilizes a unified architecture, integrating fast response and deep reasoning models, and achieves a 45% reduction in hallucination error rate compared to GPT-4o. Claude4Opus ensures security through constitutional AI, but has experienced extreme behavior such as "ransomware attacks on engineers" during testing. Gemini 2.5 Pro natively supports video input, offering greater flexibility for multimodal applications.
In practical applications, developers prefer GPT-5 or Claude4Opus, while researchers favor Gemini 2.5 Pro for its long-text analysis capabilities. In terms of pricing, GPT-5 and Gemini 2.5 Pro offer the most cost-effective pricing (1.25/1.25/10), while Claude4Opus' enterprise-level API costs 15/15/75 per million tokens. As AI competition intensifies, users need to choose according to the scenario - if you want versatility, choose GPT-5; if you focus on programming, choose Claude4Opus; and for long text processing, Gemini2.5Pro is the best choice.
