Contradiction · critical
The current official frontier version level and recent milestone releases.
The latest frontier release is GPT-5.6 from July 2026.
OpenAI, Gemini
The active recent model discussed is GPT-5.5 from April 2026.
Grok
“(codenamed “Spud” internally), released around April 23, 2026.”
How to verify: Double-check whether OpenAI's latest official release is GPT-5.6 or GPT-5.5.