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Research

Measured on Thai data, and published so anyone can check it

Open models trained for Thai, the benchmarks behind our API figures, and our papers.

Read the benchmarksPublications

Open models

Weights anyone can download and run, with the scores we measured.

An open model that reads Thai document pages into Markdown, with every table kept as a tableOpenThai 2.0 OCR MarkdownNov 12, 2026Open weightsThai-English translation that follows your rules, open at 4B, 2B and 0.8BChinda MTSep 29, 2026Open weightsA 0.8B model that decides instead of writing: a calibrated probability for every option in one passOpenThai SystemOneSep 20, 2026Open weightsOne open model that reads Thai documents and handwriting, knows Thailand, and does agentic workOpenThai 2.0Aug 27, 2026Open weightsA Thai legal model that knows the statutes by heart, and cites the section it usedOpenThai 2.0 LegalJul 24, 2026Open weightsA Thai model small enough to run on your own laptopChinda LLM 4BMay 28, 2025Open weights

Benchmarks

Each whitepaper states its dataset, method and errors, so anyone can run it again.

Thai Document OCR v3.0 against a leading cloud OCR serviceOn 2,825 Thai document pages and 150 court judgments, the same images for both: a character error rate of 29.6% against 36.0% over all pages, and 17.2% against 37.4% on budget documents. The cloud service remains slightly ahead on short photographed text.96.3% accuracyOct 5, 2026Whitepaper, PDF
Chinda TTS Text-to-Speech95.07% characters read back correctlyOct 29, 2026PDFFace Recognition84.1% right person namedOct 29, 2026PDFThai Holiday Data API110/110 national holidays correctOct 29, 2026PDFImage Background Remover0.790 IoU on peopleOct 29, 2026PDFThai Legal Data API and MCP88.0% law section in top 10Oct 29, 2026PDFFace Passive Liveness Detection300/300 attacks rejectedOct 29, 2026PDFOpenThai 2.083.1% Thai national examsOct 28, 2026PDFChinda ASR Thai Speech-to-Text97.94% character accuracyNov 9, 2026PDFChinda MT TranslationchrF++ 54.6 Thai to EnglishOct 28, 2026PDFOpenThai 2.0 Legal0.772 citation F1Oct 28, 2026PDFFace Verification98.5% accuracyOct 28, 2026PDFThai Receipt OCR94.0% field accuracyOct 28, 2026PDFThai business documents, 11 types97.9% field accuracyOct 28, 2026PDFMultilingual TranslationchrF++ 56.1 Thai to EnglishOct 28, 2026PDFThai Question Answering82.4% token F1Oct 28, 2026PDFEnglish Speech-to-Text98.07% word accuracyOct 28, 2026PDFChinese Speech-to-Text97.13% character accuracyOct 28, 2026PDFFace Detection85.6% faces foundOct 28, 2026PDFiApp Image Upscaler196/200 images closer than bicubic at 4xOct 28, 2026PDFThai Sentiment Analysis75.8% accuracyOct 28, 2026PDFThai Vehicle License Plate OCR99.4% brand accuracyAug 28, 2026PDFPassport OCR95.5% verified readsAug 25, 2026PDFThai National ID Card OCR98.0% accuracyAug 24, 2026PDFThai Bank Book OCR96.8% account numberAug 23, 2026PDFThai Driver License OCR95.14% accuracyAug 23, 2026PDFPhotographed Thai National ID Card With Signature Detection97.1% accuracyAug 23, 2026PDFOpenThai 2.0 OCR Text v2.1.1394.8% accuracyAug 22, 2026PDF

Every measured API on one page

Publications

Papers from our research team, newest first.

Reference-Grounded Data Curation for Instruction-Following Thai-English Machine TranslationAACL-IJCNLP 20262026OpenThaiGPT 1.6 and R1: Thai-centric open-source and reasoning large language modelsarXiv2025LLaVAC: fine-tuning LLaVA as a multimodal sentiment classifierarXiv2025OpenThaiGPT 1.5: technical reportNLDB 20242024

All publicationsDatasets