OpenRouter Launches GPT-6 Sol and Luna with Major Price Cuts

Key Info

OpenRouter has made GPT-6 Sol and Luna live, priced at half the cost of GPT-5.6 predecessors: Sol at $2/M input and $10/M output, Luna at $0.10/M input and $0.50/M output. Both outperform their predecessors' best scores on AutomationBench at a fraction of the cost.

Highlights

• Sol targets a cost-efficient tier; Luna is the fast, low-cost option with 66.6% on DeepSWE v1.1, comparable to Claude Opus 5 and Fable 5 at medium effort for 93-96% less per task.
• Luna at higher effort matches GPT-5.6 Sol on factuality at about 1/100th the cost.
• Both adopt Astra's communication style and improved prompt caching with 90% off cached input reads.