OpenAI ships GPT-6 Astra to top ChatGPT tiers at half the message rate of GPT-5.6 Sol
OpenAI opened GPT-6 Astra to Pro, Enterprise and Business Premium subscribers and through the OpenAI API, Azure and AWS Bedrock, rationed at roughly half Sol's rate — Plus, due in the coming days, lands at 5 to 45 messages per five-hour window against Sol's 10 to 100. The capability ships under a visible compute ceiling: frontier access sits behind the top paid tiers, with Free and Go users cut off from both Astra and Sol.
Source: the-decoder.com ↗
The standard version of GPT-6 Astra offers about half as many messages per five-hour window as GPT-5.6 Sol across all plans.
OpenAI
Why this matters
- → Frontier models now tier-gated: Free users blocked from latest AI.
- → Half the compute budget vs. prior gen — efficiency vs. capability tradeoff.
- → Compute ceiling visible to users — rationing becomes a pricing lever.
Compute rationing as tier lock