terminalbench 2.1

OpenAI previewed GPT-5.6 Sol on June 26, 2026, as the flagship model in a three-model GPT-5.6 family, and early TerminalBench 2.1 results reported by Crypto Briefing place it well ahead of Anthropic’s Claude Opus 4.8 in agentic coding. The headline number is simple enough: 88.8 percent for Sol...