A collection of 4 posts
OpenAI's GPT-5.6 Sol landed in limited preview while Claude Opus 4.8 is already GA. An honest look at pricing, context windows, benchmark claims, and how each behaves in Codex vs Claude Code — including why the public scores are suspect right now.
OpenAI's GPT-5.6 family — Sol, Terra, and Luna — explained: tiers, pricing, the new max and ultra reasoning modes, preview benchmarks, the government-restricted rollout, and what teams building AI agents should prepare.
A practical GPT-5.6 vs GPT-5.5 comparison: what actually changed across the new Sol/Terra/Luna tiers, pricing, reasoning modes, benchmarks, and a clear decision guide on whether to upgrade or stay put.
GPT-5.6 is not announced as of May 19, 2026 — no weights, API, benchmarks, or date. Here's what's real, what's rumored, and what to run today.