AI News, Research and Tool Reviews
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Character.AI pursues a $5 billion valuation amid bankruptcy filings
Character.AI seeks a valuation exceeding $5 billion through Google interest while managing 20 million monthly active users. The company faces legal scrutiny following a wrongful death lawsuit and…
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How o1 Changes the LLM Training Picture, Part 2: Search, Reward and Cost
What reasoning models borrow from game-playing systems, why the reward signal is the bottleneck outside maths and code, and when the extra…
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How o1 Changes the LLM Training Picture, Part 1: Why Imitation Hits a Ceiling
Pre-train, fine-tune, align. The standard recipe produced remarkable models and could not produce reasoning. Why that limit is structural rather than a…
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How Text Clustering Works: From Embeddings to Labelled Topics
Fifty thousand support tickets nobody has read. The pipeline that turns them into named topics, and why k-means is usually the wrong…
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The Comprehensive Guide to LLM Evaluation
The four kinds of evaluation, which metric fits which task, and how to assemble a suite you will still be running in…
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Embedding-Based Evaluation Metrics for LLM Outputs
Two sentences can share no words and mean the same thing. Embedding metrics close part of that gap – and quietly mislead…
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