Sol costs $5 for every million input tokens and $30 for every million output tokens in the API pricing, but input cache costs only $0.50 per million tokens. The cost of using it is $3 for every million input tokens and $15 for every million output, with a cached input at $0.30. According to GDPval-AA v2, its score is third overall, right below Fable 5 and Sol, and above Claude Opus 4.8. All of this at a cost of $0.14 per million input tokens and $0.28 per million output tokens under an MIT license. Every developer who uses a $0.14 input model versus a $5 input model is a developer OpenAI and Anthropic do not bill.