GPT-5.6 Luna vs GPT-6 Astra: Is $1.20 Model Good Enough?
The article compares the cost and effectiveness of two AI models, GPT-5.6 Luna and GPT-6 Astra, in code review tasks. While Astra is more expensive at $10 per million input tokens and output tokens, it finds significantly more bugs (92 vs 69) across 50 pull requests. Luna costs only $0.20 for the same amount of work but misses more bugs (24 vs 4). The article highlights that Astra is better at…
Key points
- GPT-5.6 Luna costs $0.20 per million tokens for input and output
- GPT-6 Astra costs $10 per million tokens for input and output
- Luna finds 69 verified bugs, while Astra finds 92
Model page: GPT-6 Astra →
The story so far
5 episodes →- GPT-5.6 Luna vs GPT-6 Astra: Is $1.20 Model Good Enough?this story
GPT-5.6 Luna vs. GPT-6 Astra: Is a $1.20 Model Good Enough for Code Review?
entelligence.ai · 9 September 2026
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1source- Hacker News discussion · 55 pointsnews.ycombinator.com
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