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Jun 11, 2026 · Artificial Intelligence

ChartNet: MIT/IBM’s Million‑Scale Synthetic Chart Dataset with 1.5M Diverse Samples

MIT and IBM researchers introduce ChartNet, the largest code‑guided synthetic chart dataset containing 1.5 million multimodal samples across 24 chart types and six libraries, and demonstrate that fine‑tuning visual‑language models on it yields consistent, significant gains on chart reconstruction, data extraction, summarization, and reasoning tasks, outperforming much larger off‑the‑shelf models including GPT‑4o.