June 26, 2026·Bullish·tech development

OpenAI Previews Three New Models: Sol, Terra, Luna

OpenAI is previewing three new models—Sol, Terra, and Luna—to trusted partners via Codex and its API. Sol is positioned as a flagship model for long terminal workflows, complex coding loops, and security research. The move suggests a strategic routing decision ahead of a broader GPT-5.6 release.

Detected & updated continuously · Source: Ruma

Mentioned

OpenAI (Republic Pre-IPO) (preopai)

Sources

@HarryTandy

GPT-5.6 is a routing decision now OpenAI is previewing 3 models first to trusted partners in Codex + API: 1. Sol: flagship model for long terminal workflows, hard coding loops, and security research 2. Terra: GPT-5.5-class performance at 2x lower cost 3. Luna: fast, low-cost https://t.co/I7x3vYT930