GPT-5.6 Sol, along with Terra and Luna, will launch publicly this Thursday

What's happening

OpenAI is rolling out the GPT-5.6 family publicly, launching flagship Sol plus Terra and Luna; the rollout began July 9 following a limited preview and is being made available across ChatGPT, Codex, and the OpenAI API with global availability continuing over the next 24 hours. Sol is presented as the frontier reasoning model (including a Sol Ultra variant noted by users), Terra is described as a balanced model delivering previous-flagship performance at about 2x lower cost, and Luna is positioned as the fastest and most cost-efficient option. Users report immediate impressions: faster performance, greater autonomy, and Sol finding substantive improvements in large codebases (one user reported Sol identified 47 improvements and implemented changes in 10 minutes). The release also shipped related realtime and voice capabilities, including GPT-Live-1 and gpt-realtime-2.1 with lower p95 latency.

Why it's trending

Multiple posts and a weekly recap show a coordinated public rollout and fast user testing feedback, so attention spiked as availability expands now.

SignalHolding at its usual pace, confirmed across 2 independent source types.