GPT-5.6 Luna vs. GPT-6 Astra: Is a $1.20 Model Good Enough for Code Review?

entelligence.ai
September 14, 2026
10 min read
55/100
Summary
GPT-5.6 Luna vs GPT-6 Astra: Is a $1.20 Model Good Enough for Code Review? GPT-5.6 Luna costs $0.20 per million input tokens and $1.20 per million output tokens. GPT-6 Astra costs $10 and $50. On the same pull requests, one Luna review cost $0.0041 and one Astra review cost $0.113, a 28x difference. Our last post compared Astra with GPT-5.6 Sol. This time we wanted to know what you give up if ever...
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