GPT-5.6 Sol launch day: benchmarks lead, but users still see it as Fable’s assistant

2026-07-09 群聊日报

OpenAI launched GPT-5.6 Sol, rebranding the Codex client as ChatGPT and adding max/ultra reasoning tiers. Sol leads on Terminal-Bench 2.1, BrowseComp, and Agents’ Last Exam at half Fable’s price, but real-world coding tests split the group: some say Fable is still much better, others use Sol for code review before handing off to 5.5. Ultra mode burned 24% quota in 10 minutes; fast mode was widely dismissed. OpenAI ran a 24-hour double quota reset to celebrate, with some users receiving four Full reset cards. Industry news: Fidji Simo stepped down as OpenAI AGI Deployment CEO due to chronic illness, former Fed chair Ben Bernanke joined Anthropic’s Long-Term Benefit Trust, and Anthropic’s ARR estimate was revised to $69B. The highlight: a group member had 5.6 read his entire GitHub organization and write a letter—it surfaced a 99.6% solo commit rate, a bus factor of one, and the line “your body is not a Release directory that can be rebuilt from Source.”

Why it matters: GPT-5.6 Sol launch is the day's top event, and this group digest adds community benchmark comparisons beyond official numbers — high signal density with first-hand judgment. Slight discount because it's a group chat digest rather than primary source; some details rely on membe...