GPT-5.6 Luna vs GPT-6 Astra: is a $1.20 model good enough for code review?
Summary
Benchmarked GPT-5.6 Luna vs GPT-6 Astra across 50 real PRs, showing Astra found 92 bugs vs Luna's 69, with Luna catching 75% of bugs at 3.6% of the cost. Includes detailed evaluation breakdown and upcoming comparison with Fable 5.1.
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