Emphasis
Model A mentions an internal model named Astra explicitly described as the next major model, while Model B does not mention Astra.
Mentions Astra as an internal next major model announced via research output
Grok
Omits details about Astra, focusing entirely on GPT-5.6 and general lack of GPT-6 dates
OpenAI
How to verify: Check if mentioning Astra adds useful context or if omitting it keeps the answer more concise.