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chore: switch to fp16 CoreML whisper models #1224

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Merged
msluszniak merged 2 commits into from
Jun 9, 2026
+36 −26
Merged

chore: switch to fp16 CoreML whisper models #1224

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c94c832
Update urls
IgorSwat Jun 9, 2026
43069e7
Setup XNNPACK whisper as default for simulators
IgorSwat Jun 9, 2026
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24 changes: 17 additions & 7 deletions apps/speech/screens/SpeechToTextScreen.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -22,12 +22,24 @@ import { ModelPicker, ModelOption } from '../components/ModelPicker';
const speechToText = models.speech_to_text;
const vad = models.vad;

const isSimulator = DeviceInfo.isEmulatorSync();
const backend = Platform.OS === 'ios' && !isSimulator ? 'coreml' : 'xnnpack';

type STTModelSources = SpeechToTextProps['model'];

const MODELS: ModelOption<STTModelSources>[] = [
{ label: 'Whisper Tiny EN', value: speechToText.whisper_tiny_en() },
{ label: 'Whisper Base EN', value: speechToText.whisper_base_en() },
{ label: 'Whisper Small EN', value: speechToText.whisper_small_en() },
{
label: 'Whisper Tiny EN',
value: speechToText.whisper_tiny_en({ backend }),
},
{
label: 'Whisper Base EN',
value: speechToText.whisper_base_en({ backend }),
},
{
label: 'Whisper Small EN',
value: speechToText.whisper_small_en({ backend }),
},
];
import FontAwesome from '@expo/vector-icons/FontAwesome';
import {
Expand All @@ -42,12 +54,10 @@ import DeviceInfo from 'react-native-device-info';
import { VerboseTranscription } from '../components/VerboseTranscription';
import ErrorBanner from '../components/ErrorBanner';

const isSimulator = DeviceInfo.isEmulatorSync();

export const SpeechToTextScreen = ({ onBack }: { onBack: () => void }) => {
const [selectedModel, setSelectedModel] = useState<STTModelSources>(
Platform.OS === 'ios'
? speechToText.whisper_base_en()
Platform.OS === 'ios' && !isSimulator
? speechToText.whisper_base_en({ backend })
: speechToText.whisper_tiny_en()
);

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38 changes: 19 additions & 19 deletions packages/react-native-executorch/src/constants/modelUrls.ts
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
import { Platform } from 'react-native';
import { URL_PREFIX, PREVIOUS_VERSION_TAG } from './versions';
import { URL_PREFIX, PREVIOUS_VERSION_TAG, VERSION_TAG } from './versions';

// LLMs

Expand Down Expand Up @@ -813,29 +813,29 @@ export const STYLE_TRANSFER_UDNIE_QUANTIZED = {
} as const;

// S2T
export const WHISPER_TINY_EN_TOKENIZER = `${URL_PREFIX}-whisper-tiny.en/${PREVIOUS_VERSION_TAG}/tokenizer.json`;
export const WHISPER_TINY_EN_MODEL_XNNPACK = `${URL_PREFIX}-whisper-tiny.en/${PREVIOUS_VERSION_TAG}/xnnpack/whisper_tiny_en_xnnpack_fp32.pte`;
export const WHISPER_TINY_EN_MODEL_COREML = `${URL_PREFIX}-whisper-tiny.en/${PREVIOUS_VERSION_TAG}/coreml/whisper_tiny_en_coreml_fp32.pte`;
export const WHISPER_TINY_EN_TOKENIZER = `${URL_PREFIX}-whisper-tiny.en/${VERSION_TAG}/tokenizer.json`;
export const WHISPER_TINY_EN_MODEL_XNNPACK = `${URL_PREFIX}-whisper-tiny.en/${VERSION_TAG}/xnnpack/whisper_tiny_en_xnnpack_fp32.pte`;
export const WHISPER_TINY_EN_MODEL_COREML = `${URL_PREFIX}-whisper-tiny.en/${VERSION_TAG}/coreml/whisper_tiny_en_coreml_fp16.pte`;

export const WHISPER_BASE_EN_TOKENIZER = `${URL_PREFIX}-whisper-base.en/${PREVIOUS_VERSION_TAG}/tokenizer.json`;
export const WHISPER_BASE_EN_MODEL_XNNPACK = `${URL_PREFIX}-whisper-base.en/${PREVIOUS_VERSION_TAG}/xnnpack/whisper_base_en_xnnpack_fp32.pte`;
export const WHISPER_BASE_EN_MODEL_COREML = `${URL_PREFIX}-whisper-base.en/${PREVIOUS_VERSION_TAG}/coreml/whisper_base_en_coreml_fp32.pte`;
export const WHISPER_BASE_EN_TOKENIZER = `${URL_PREFIX}-whisper-base.en/${VERSION_TAG}/tokenizer.json`;
export const WHISPER_BASE_EN_MODEL_XNNPACK = `${URL_PREFIX}-whisper-base.en/${VERSION_TAG}/xnnpack/whisper_base_en_xnnpack_fp32.pte`;
export const WHISPER_BASE_EN_MODEL_COREML = `${URL_PREFIX}-whisper-base.en/${VERSION_TAG}/coreml/whisper_base_en_coreml_fp16.pte`;

export const WHISPER_SMALL_EN_TOKENIZER = `${URL_PREFIX}-whisper-small.en/${PREVIOUS_VERSION_TAG}/tokenizer.json`;
export const WHISPER_SMALL_EN_MODEL_XNNPACK = `${URL_PREFIX}-whisper-small.en/${PREVIOUS_VERSION_TAG}/xnnpack/whisper_small_en_xnnpack_fp32.pte`;
export const WHISPER_SMALL_EN_MODEL_COREML = `${URL_PREFIX}-whisper-small.en/${PREVIOUS_VERSION_TAG}/coreml/whisper_small_en_coreml_fp32.pte`;
export const WHISPER_SMALL_EN_TOKENIZER = `${URL_PREFIX}-whisper-small.en/${VERSION_TAG}/tokenizer.json`;
export const WHISPER_SMALL_EN_MODEL_XNNPACK = `${URL_PREFIX}-whisper-small.en/${VERSION_TAG}/xnnpack/whisper_small_en_xnnpack_fp32.pte`;
export const WHISPER_SMALL_EN_MODEL_COREML = `${URL_PREFIX}-whisper-small.en/${VERSION_TAG}/coreml/whisper_small_en_coreml_fp16.pte`;

export const WHISPER_TINY_TOKENIZER = `${URL_PREFIX}-whisper-tiny/${PREVIOUS_VERSION_TAG}/tokenizer.json`;
export const WHISPER_TINY_MODEL_XNNPACK = `${URL_PREFIX}-whisper-tiny/${PREVIOUS_VERSION_TAG}/xnnpack/whisper_tiny_xnnpack_fp32.pte`;
export const WHISPER_TINY_MODEL_COREML = `${URL_PREFIX}-whisper-tiny/${PREVIOUS_VERSION_TAG}/coreml/whisper_tiny_coreml_fp32.pte`;
export const WHISPER_TINY_TOKENIZER = `${URL_PREFIX}-whisper-tiny/${VERSION_TAG}/tokenizer.json`;
export const WHISPER_TINY_MODEL_XNNPACK = `${URL_PREFIX}-whisper-tiny/${VERSION_TAG}/xnnpack/whisper_tiny_xnnpack_fp32.pte`;
export const WHISPER_TINY_MODEL_COREML = `${URL_PREFIX}-whisper-tiny/${VERSION_TAG}/coreml/whisper_tiny_coreml_fp16.pte`;

export const WHISPER_BASE_TOKENIZER = `${URL_PREFIX}-whisper-base/${PREVIOUS_VERSION_TAG}/tokenizer.json`;
export const WHISPER_BASE_MODEL_XNNPACK = `${URL_PREFIX}-whisper-base/${PREVIOUS_VERSION_TAG}/xnnpack/whisper_base_xnnpack_fp32.pte`;
export const WHISPER_BASE_MODEL_COREML = `${URL_PREFIX}-whisper-base/${PREVIOUS_VERSION_TAG}/coreml/whisper_base_coreml_fp32.pte`;
export const WHISPER_BASE_TOKENIZER = `${URL_PREFIX}-whisper-base/${VERSION_TAG}/tokenizer.json`;
export const WHISPER_BASE_MODEL_XNNPACK = `${URL_PREFIX}-whisper-base/${VERSION_TAG}/xnnpack/whisper_base_xnnpack_fp32.pte`;
export const WHISPER_BASE_MODEL_COREML = `${URL_PREFIX}-whisper-base/${VERSION_TAG}/coreml/whisper_base_coreml_fp16.pte`;

export const WHISPER_SMALL_TOKENIZER = `${URL_PREFIX}-whisper-small/${PREVIOUS_VERSION_TAG}/tokenizer.json`;
export const WHISPER_SMALL_MODEL_XNNPACK = `${URL_PREFIX}-whisper-small/${PREVIOUS_VERSION_TAG}/xnnpack/whisper_small_xnnpack_fp32.pte`;
export const WHISPER_SMALL_MODEL_COREML = `${URL_PREFIX}-whisper-small/${PREVIOUS_VERSION_TAG}/coreml/whisper_small_coreml_fp32.pte`;
export const WHISPER_SMALL_TOKENIZER = `${URL_PREFIX}-whisper-small/${VERSION_TAG}/tokenizer.json`;
export const WHISPER_SMALL_MODEL_XNNPACK = `${URL_PREFIX}-whisper-small/${VERSION_TAG}/xnnpack/whisper_small_xnnpack_fp32.pte`;
export const WHISPER_SMALL_MODEL_COREML = `${URL_PREFIX}-whisper-small/${VERSION_TAG}/coreml/whisper_small_coreml_fp16.pte`;

/**
* @category Models - Speech To Text
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