OpenAI's GPT-5.6 Sol Ultra tops TerminalBench 2.1 at 91.9%, reclaiming the AI benchmark crown and lifting Microsoft, its largest investor and exclusive cloud partner.
Gemini 3.1 Pro Preview scores dead last on TerminalBench 2.1 (~70%), widening the gap vs. OpenAI and Anthropic, reinforcing Alphabet's AI competitiveness problem.