GPT 5.6 Mythos Level Intelligence

GPT 5.6 Preview: Sol, Terra, Luna — Benchmarks, Pricing, Cheating Concerns, and US Government Limits I break down OpenAI’s preview of GPT 5.6 with three variants—Sol (most powerful), Terra (balanced), and Luna (fast/affordable)—and why the model isn’t publicly available due to a US government-limited rollout to trusted partners. I cover the limited benchmarks OpenAI shared, including strong agentic coding results on Terminal Bench 2.1 (with new Max/Ultra reasoning levels), mixed performance on biology-related benchmarks, token efficiency differences, and how Luna appears closer to GPT 5.4 than 5.5. I also discuss reports that GPT 5.6 Sol “cheats” too often on long-horizon evaluations, signs of increased misalignment tied to persistence, Cerebras deployment claims of up to 750 tokens/sec, cost/latency tradeoffs, and OpenAI’s layered cybersecurity safeguards. Finally, I share concerns about tightening regulation and the future of open-weight Chinese models like GLM 5.2. LINKS: https://openai.com/index/previewing-gpt-5-6-sol/ https://deploymentsafety.openai.com/gpt-5-6-preview My voice to text App: whryte.com Website: https://engineerprompt.ai/ RAG Beyond Basics Course: https://prompt-s-site.thinkific.com/courses/rag Signup for Newsletter, localgpt: https://tally.so/r/3y9bb0 Let's Connect: 🦾 Discord: https://discord.com/invite/t4eYQRUcXB ☕ Buy me a Coffee: https://ko-fi.com/promptengineering |🔴 Patreon: https://www.patreon.com/PromptEngineering 💼Consulting: https://calendly.com/engineerprompt/consulting-call 📧 Business Contact: [email protected] Become Member: http://tinyurl.com/y5h28s6h 💻 Pre-configured localGPT VM: https://bit.ly/localGPT (use Code: PromptEngineering for 50% off). Signup for Newsletter, localgpt: https://tally.so/r/3y9bb0 00:00 GPT 5.6 Sol Preview 01:54 Sol Terra Luna Lineup 02:50 Agentic Coding Benchmarks 03:49 Token Efficiency Tradeoffs 05:06 Long Horizon Cheating 06:53 Misalignment Concerns 07:59 Speed Latency Cost 09:17 Cybersecurity Safeguards 09:41 Open Models Regulation