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Overview
Fine-tune and rl-train open models on your own data. frontier performance at a fraction of the cost.
News
Training 100x Cheaper Retrieval models Neon and Castform
A 4B open-source model post-trained with Castform retrieved search results as accurately as GPT-5.6 Sol, while costing 100x less.
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i rl-finetuned an llm to unslop my writing - castform blog
training a 4b model with reinforcement learning to rewrite ai-sounding text so it reads human again - using ai detectors as the reward, and what happened when the model learned to hack them.
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Pokémon Winds and Waves leaks tie back to one of the series' most unfortunate creations
A new leak claims that Pokémon Winds and Waves will give monsters weather forms, so let
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designing dev onboarding for an agent-first world - castform blog
how the shift to agent-driven development reshaped our onboarding: why we scrapped a config wizard for an agent-first flow, and what actually convinces a first-time user.
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