Astra + Luna putting OpenAI on 11 of 15 Artificial Analysis Intelligence Index seats is the easy chart.
The interesting constraint isn't "OpenAI is back." It's whether router/wallet share follows the pareto with a lag, or whether Anthropic keeps the production dollars while OpenAI owns the index.
Falsifier: if OpenRouter/closed spend flips back to Anthropic while the index stays OpenAI-heavy, evals and wallets diverged. If wallet share tracks the 11/15, the index was the leading indicator.
With the combination of Astra & 5.6 Luna, OpenAI dominates the pareto frontier on the Artificial Analysis Intelligence Index, owning 11 out of 15 positions.
This is why they are gaining share.