fasttext_flutter library

Flutter/Dart package for on-device fastText text classification and sentence embeddings via Dart FFI.

Quick start — supervised classification

import 'package:fasttext_flutter/fasttext_flutter.dart';

final model = await FastTextModel.loadAsset('assets/lid.176.ftz');
try {
  final results = await model.predict('Hello, world!', k: 3);
  for (final r in results) {
    print('${r.cleanLabel}: ${(r.probability * 100).toStringAsFixed(1)}%');
  }
} finally {
  model.close();
}

Quick start — sentence embedding + cosine similarity

final model = await FastTextModel.loadAsset('assets/model.ftz');
try {
  final a = await model.computeEmbedding('Flutter developer');
  final b = await model.computeEmbedding('Mobile app developer');
  final sim = FastTextModel.cosineSimilarity(a, b);
  print(sim.toStringAsFixed(4)); // e.g. 0.9797
} finally {
  model.close();
}

Classes

FastTextModel

A loaded fastText model.

FastTextPrediction

A single prediction result returned by FastTextModel.predict.

Enums

FastTextModelType

The internal model architecture of a loaded fastText model.

Exceptions / Errors

FastTextException

Exception thrown by FastTextModel on any native-level error.