Ultrafast is rolling out today for GPT-6.1 Sol in the API, Codex, and ChatGPT Work. Near-Astra intelligence at up to 8x faster speeds than Sol Standard, so you can build as fast as the ideas come.↗

GPT-6 Sol and Luna are out. Not only are they a very significant improvement across the board, but also in writing and general "you know when you try it" quality. We are also permanently reducing the API price by 50% making both of them viable for a ton of new usecases and maki…↗

GPT-6 Sol and Luna just landed in Astra’s orbit. Both launch today with API prices 50% lower than GPT-5.6. Build with Sol. Scale with Luna. To production and beyond.↗

After deployment, we applied GPT-5.6 Sol to advance the frontier of efficiency by making itself more efficient to run. The results: - 20% lower serving costs from production GPU kernel improvements. - 15%+ better token-generation efficiency from improved speculative decoding.↗

i know i've been griping about a couple SOL things but overall the GPT 5.6 models are *incredible* - here's my highlights Sol - doesn't talk like a robot anymore - super well done and impressive. not quite fable-level but soooo much better than 5.5 Terra - truly a sonnet-class…↗

TLDR: When using Sol, clean up your AGENTS.md to de-emphasize any language encouraging sustained persistence and turn on auto-review. - GPT-5.6 Sol ran destructive cleanup on three virtual machines the user did not name. - GPT-5.6 Sol claimed it completed work that it had not a…↗