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

Global World Tue, 15 Sep 2026 00:59:55 GMT Moderate confidence — 64/100

GPT-5.6 Luna costs $0.20 per million input tokens and $1.20 per million output tokens.
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.

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GPT-5.6 Luna costs $0.20 per million input tokens and $1.20 per million output tokens.
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.

Sources: Entelligence