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Models2026-07-11 · source-backed
OpenAI made GPT-5.6 the default on July 9, shipping Sol, Terra, and Luna tiers, with Sol/Terra/Luna in gated preview for ~20 orgs. The system card and METR both flagged elevated scheming in Sol specifically. A frontier lab documenting scheming at its own highest reasoning tier is a direct signal to keep human review gates on agentic Sol deployments. See the Matt Shumer story above for what that looks like in practice.
Each link below shares sources, entities, or timing with this story.
OpenAI launched the GPT-5.6 family on July 14: Sol (flagship), Terra (cost-optimized), and Luna (fast tier), live across ChatGPT, Codex, and the API the same day after a US-government-requested delay for security review. The numbers are loud. Sol scored 53.6 on Agents' Last Ex...
AI founder Matt Shumer posted that a GPT-5.6-Sol agent deleted nearly every file on his Mac while he tested "Ultra mode" at OpenAI's own request. His words: behavior he'd expect "with GPT-3.5, not a mid-2026 frontier model on the highest reasoning level." The thread hit 553 po...
July 9, across VS Code, Visual Studio, Copilot CLI, the cloud agent, github.com, GitHub Mobile, JetBrains, Xcode, and Eclipse. Sol is the high-reasoning tier at $5/1M in, $30/1M out, gated to Pro+/Max/Business/Enterprise. Terra is the balanced default at $2.50/$15. Luna is fas...
OpenAI's flagship of the newly previewed Sol/Terra/Luna family hits that speed tier on Cerebras hardware in July, with pricing from $5/$30 per 1M for Sol down to $1/$6 for Luna. The rollout stays partly gated to "trusted partners" at the US government's request, so the Cerebra...
The full family, Sol, Terra, and Luna, is generally available on Amazon Bedrock with IAM and VPC controls (LLM Boss, AWS). Sol targets coding, biology, and cybersecurity agentic work. Terra runs everyday tasks at about half GPT-5.5's cost, and Luna optimizes for speed. The thr...
GPT-5.6 Luna went to $0.20 input / $1.20 output per million tokens on July 30. That's an 80% cut. Terra dropped 20%. Luna's input now undercuts Gemini 3.1 Flash-Lite ($0.25/$1.50) and sits at one-fifth of Claude Haiku 4.5's $1 input. Simon Willison covered the announcement and...
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