GoKawiilDeveloper finds DeepSeek 4.1 Flash matches frontier models at fraction of cost
A developer reports using DeepSeek 4.1 Flash heavily across a dozen projects for about a month, saying it performs comparably to models like Opus in daily work and conversation without a noticeable quality gap. The model is paired with a $10/month OpenCode Go subscription, making usage effectively unlimited, with typical sessions costing under $1.