GPT-5.5 has regained the top position in the Artificial Analysis Intelligence Index, surpassing competitors Anthropic and Google, as reported by Artificial Analysis. Launched as OpenAI’s smartest model to date, GPT-5.5 emphasizes faster performance on demanding tasks and breaks a recent three-way tie at the top, marking a significant achievement in the competitive landscape of AI models. The Artificial Analysis Intelligence Index employs a rigorous benchmark methodology, incorporating ten evaluations that assess a range of capabilities, including reasoning and coding skills.

Google: Google, through DeepMind, develops multimodal AI models like Gemini for advanced reasoning, coding, and real-world applications. Gemini 3.1 Pro has been a leading frontier model in recent evaluations. It trails GPT-5.5 following the latest Artificial Analysis Intelligence Index update.
GPT-5.5: OpenAI’s GPT-5.5 is a frontier large language model designed for complex tasks like coding, research, and data analysis, featuring variants such as xhigh, high, and medium for different inference efforts. It excels in reasoning and fact recall across independent benchmarks. GPT-5.5 has topped the Artificial Analysis Intelligence Index, reclaiming the lead ahead of rivals from Anthropic and Google.
Anthropic: Anthropic is an AI company focused on developing safe, reliable models in the Claude family, including Opus and Sonnet variants optimized for reasoning and agentic tasks. Their models recently held top positions on AI leaderboards alongside competitors. Claude models now rank behind GPT-5.5 on the Artificial Analysis Intelligence Index.
Artificial Analysis: Artificial Analysis is an independent platform that benchmarks AI models and API providers on metrics including intelligence, speed, and quality through leaderboards and comparisons. Their Intelligence Index aggregates performance from ten challenging evaluations focused on reasoning and real-world tasks. They reported GPT-5.5 as the new number one model in AI.

{“Model Launch”: “GPT-5.5 is positioned as OpenAI’s most advanced model, focusing on improved performance in complex tasks.”, “Benchmark Methodology”: “The Artificial Analysis Intelligence Index evaluates models using comprehensive assessments in reasoning, academic proficiency, coding, and practical application across various sectors.”, “Competitive Landscape”: “GPT-5.5 surpasses previous leaders, Anthropic’s Claude Opus and Google’s Gemini models, to claim the top position.”}