Although GPT 5.6 Sol seems like a great improvement, imo GPT 5.6 Lunatic seems like the most significant improvement due to the price. At 1 dollar input and 6 dollar output, it still has capabilities comparable to GPT 5.4.
Summary
GPT 5.6 Lunatic offers comparable capabilities to GPT 5.4 at a significantly lower price of $1 input and $6 output, making it a strong alternative to Gemini Flash and GPT 5.4 mini.
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