OpenAI Launches GPT-5.6 Sol: The New Flagship AI Model

OpenAI has publicly released its latest and most powerful artificial intelligence model series, GPT-5.6, featuring the flagship Sol model, promising advanced reasoning and multimodal capabilities.

The top 3

  1. MMLU: Knowledge & Reasoning Leader: The MMLU (Massive Multitask Language Understanding) benchmark, covering 57 diverse subjects, assesses an AI's broad knowledge and reasoning, with OpenAI's o1 currently leading with 91.8% as of July 2026.
  2. HumanEval: Coding Proficiency Standard: HumanEval, developed by OpenAI, is a benchmark of 164 Python problems designed to assess an LLM's code generation and functional correctness, with Claude Sonnet 4 achieving a 95.1% success rate in one study.
  3. GPQA: Advanced Scientific Reasoning: The GPQA benchmark, featuring challenging graduate-level questions in biology, physics, and chemistry, tests advanced scientific reasoning, with GPT-5.6 Sol scoring 94.6% as of July 2026.

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