I'm gradually replacing OpenAI models usage with DeepSeek 4.1 flash (for my personal projects). DS high is very good at orchestrating, max for planning and implementation and I do a final review with GPT Astra (I use OhMyPi as agent). Plenty of DS usage for just $10 on Open Code Go and with this referral we both get $5 https://opencode.ai/go?ref=V9Q1ZFV3A9