This is a little chart I made 2 years ago (before GPT-5 was launched).
GPT-5 era muddied the waters a bit with heavy RL, but we are definitely following this cycle with GPT-6 now.
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Astra was a great model but expensive, GPT-6.1-Sol was only slightly worse, but 80% cheaper, then GPT-6.1-Terra is slightly worse than Sol, but it is 50% cheaper.
So in <2 months, we got a model that it only somewhat worse than a model that is 10x more expensive. Good stuff.
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