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Same Modalities, Different Loss: Pairing Is Its Own Multimodal Data Budget

TL;DR for operators A multimodal dataset can contain the same amount of image, text, audio, or other modality-specific data yet produce different model performance depending on how often those modalities occur together. Marcus Ma and Shrikanth Narayanan isolate that distinction in Paired Multimodal Scaling Laws1, varying pairing while holding modality-specific data budgets fixed across three supervised environments. ...

October 5, 2026 · 7 min · Zelina
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When More Problems Stop Helping: RL Data Scaling Becomes an Allocation Problem

TL;DR for operators A post-training team with a fixed compute budget has several ways to spend it: add more verified problems, generate variants of existing problems, increase difficulty, or expose the model to structurally different tasks. The usual accounting metric—number of training problems—does not tell the team which choice produces the most useful learning experience. ...

September 3, 2026 · 8 min · Zelina
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When AI Knows the Map but Gets Lost on the Journey

Workflow demos are usually polite. They show the agent reading a request, calling a tool, checking a result, and producing an answer before anything embarrassing has time to happen. The real test begins later. Not at step three. At step twenty-seven, when a previous decision constrains the next one, a small drift compounds, and the system must still remember what “done correctly” means. This is where many AI products discover that knowing the rule is not the same as applying it repeatedly without wobbling. A charming discovery, preferably not made inside a production accounting workflow. ...

April 20, 2026 · 19 min · Zelina
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Scaling Smarter, Not Larger: Why Your AI Dataset Is Probably Wasting Money

The expensive habit of feeding the machine Data teams have a familiar ritual. The model disappoints. Someone asks for more data. Another person asks for cleaner data. A third person, usually with a spreadsheet and a suspiciously calm face, asks whether the extra labeling budget is approved. Then the pipeline expands. More driving clips. More corner cases. More annotated scenes. More storage. More training runs. More dashboards explaining why the latest model is still not quite where it should be. ...

April 12, 2026 · 17 min · Zelina