not much happened today

**OpenAI** launched the **GPT-5.6** family with three models: **Sol**, **Terra**, and **Luna**, integrated across **ChatGPT**, **Codex**, and the API. Pricing tiers range from **$1 to $5 per million tokens** with new cache-write pricing and a 90% cache-read discount. The launch includes new app features like **ChatGPT Work**, a desktop app merging Codex and ChatGPT, **Sites beta**, programmatic tool calling, and multi-agent beta. **Sam Altman** called GPT-5.6 Sol "*the best model we have ever produced*" with strong agentic and coding performance, improved artifact quality, and better economics. Independent evaluations show Sol near the frontier on coding-agent workloads with an Intelligence Index score of **59**, slightly below Claude Fable 5 but at about one-third the cost. Terra and Luna offer lower-cost alternatives with competitive performance.