Models (new GPT-5 variants)
- Added: gpt-5-4-high, gpt-5-4-xhigh, gpt-5-5-high, gpt-5-5-medium, gpt-5-5-xhigh, gpt-5.4
→ Expanding available GPT-5 model tiers with additional performance/quality options.
No flag, endpoint, or host changes. No sitemap or robots.txt updates.