4B Open-Source Model Post-Trained with Castform Matches GPT-5.6 at 100x Lower Cost
petrusenko_max · x · 2026-08-07
A 4B open-source model post-trained with Castform matches the search accuracy of GPT-5.6 Sol while cutting the cost per query by 100x. Combining Castform with Neon's Lakebase Postgres enables faster, cheaper multi-hop search without the need for complex ML infrastructure.
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