Pinned: We’re making better intelligence easier to access in ChatGPT for everyone: - GPT-5.6 Sol…

TL;DR - OpenAI announced a ChatGPT tier-wide model rollout: GPT-5.6 Sol becomes the backbone for both Instant and deep-reasoning modes on Plus/Pro, while Free and Go users get unlimited text chats on GPT-5.6 Luna. It matters as a signal of how frontier labs are consolidating model families and pushing reasoning-grade capability down the pricing ladder.

• GPT-5.6 Sol now serves both fast "Instant" responses and extended reasoning for paid Plus/Pro tiers, unifying what were previously separate model routes.
• OpenAI claims Sol delivers "more factual, focused" outputs — a positioning around hallucination reduction and response conciseness rather than raw capability jumps.
• Free and Go tiers move to unlimited text chat on GPT-5.6 Luna (a lighter/cheaper sibling), effective the day after the post — implying meaningful inference-cost reductions.
• Content is a short product announcement thread with no benchmarks, model cards, or architecture details; capability claims are unverified from this source alone.