Sol and Terra reach near-frontier scores on VIALS-AA at much lower Cost per Task than peers
GPT-6.1 Sol scores 59% at ~$0.056 per task, and GPT-6.1 Terra 60% at ~$0.073. Compared with Sol, GPT-6 Astra reaches 63% at ~5× the Cost per Task, Gemini 4 Carbon 64% at ~23×, and Claude Opus 5.5 (max with fallback) 61% at ~29×
