{"rewrite":{"id":"r_87a43ec2e6886c5e8dfa48fa","clusterId":"c_7e27fef2c4b0766988209726","slug":"third-door-develops-japanese-speech-recognition-engine-that-runs-on-cpu-alone","model":"deepseek-v4-flash:free","headline":"Third Door Develops Japanese Speech Recognition Engine That Runs on CPU Alone","summary":"LLC Third Door has developed a Japanese speech recognition engine that runs on a standard PC's CPU without a GPU. In a same-condition comparison using all 5,000 utterances of the JSUT basic5000 dataset, it achieved a character error rate of 1.86%, outperforming OpenAI's Whisper large-v3 (3.15%) and Google Speech-to-Text (3.29%). The engine operates at about 13 times real-time speed on an Apple M4 notebook CPU and is available for testing in a browser.","whyItMatters":"The engine's CPU-only operation and accuracy gains could lower the barrier for speech recognition in applications where GPUs or cloud APIs are impractical, such as phone response automation and on-premise transcription.","webCardHtml":"\u003cp\u003eLLC Third Door has developed a Japanese speech recognition engine that runs on the CPU of a standard PC alone, without requiring a GPU. In a same-condition comparison using all 5,000 utterances of the public evaluation data JSUT basic5000, the engine recorded a character error rate of 1.86%, outperforming OpenAI\u0026#39;s Whisper large-v3 (3.15%) and Google Speech-to-Text (3.29%).\u003c/p\u003e\u003cp\u003eThe engine operates at approximately 13 times real-time speed on the CPU of a notebook PC (Apple M4), and it is available on a demo page that can be tried from a browser. The company notes that many high-accuracy speech recognition systems assume GPUs or cloud APIs, which has been a barrier in applications where it is difficult to prepare a GPU for each line or send voice data externally.\u003c/p\u003e\u003cp\u003eApplying the same design approach to English, the engine recorded a word error rate of 1.91% on the LibriSpeech test-clean dataset, surpassing Whisper large-v3 (2.47%) under the same scoring conditions.\u003c/p\u003e","blueskyPost":"Third Door's new Japanese STT engine runs on CPU alone, hitting 1.86% CER on JSUT, beating Whisper large-v3 and Google STT. 13x real-time on an Apple M4. Demo in browser.","twitterPost":"Third Door's CPU-only Japanese STT engine hits 1.86% CER on JSUT, beating Whisper large-v3 (3.15%) and Google STT (3.29%). Runs 13x real-time on Apple M4. Demo live.","threadsPost":null,"newsletterBlurb":"LLC Third Door has developed a Japanese speech recognition engine that runs on a standard PC's CPU, achieving a character error rate of 1.86% on the JSUT basic5000 dataset. This outperforms OpenAI's Whisper large-v3 and Google Speech-to-Text in the same conditions, with a demo available in the browser.","attributionJson":"[{\"source\":\"ASCII.jp\",\"url\":\"https://ascii.jp/elem/000/004/426/4426185/?rss\",\"title\":\"Develops Japanese Speech Recognition Engine That Runs on CPU Alone, Significantly Outperforming Whisper large-v3 and Google STT in Recognition Accuracy\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4667,"outputTokens":700,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1786346277,"createdAt":"2026-08-10T07:06:31.000Z","publishedAt":"2026-08-10T07:06:44.000Z","updatedAt":"2026-08-10T07:06:31.000Z"},"cluster":{"id":"c_7e27fef2c4b0766988209726","canonicalTitle":"CPUだけで動く日本語音声認識エンジンを開発、認識精度でWhisper large-v3・Google STTを大きく上回る","representativeArticleId":"a_aad695741fd36b86bc75cf4b","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-08-10T03:11:36.000Z","lastSeenAt":"2026-08-10T03:11:36.000Z","updatedAt":"2026-08-10T07:06:44.000Z"},"attribution":[{"source":"ASCII.jp","url":"https://ascii.jp/elem/000/004/426/4426185/?rss","title":"CPUだけで動く日本語音声認識エンジンを開発、認識精度でWhisper large-v3・Google STTを大きく上回る"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":[],"type":"news","domain":"other","is_roundup":false},"keyFacts":null}