alt Inc. releases world's first Japanese LLM on AWS Marketplace
API service launched for LHTM-OPT, a lightweight large language model; Japanese LLMs now available for a wider range of applications

alt Inc. (, the Japan-based developer and distributor of Personal Artificial Intelligence (P.A.I.®️) and AI clone technology (head office: Minato-ku, Tokyo; CEO: Kazutaka Yonekura), is pleased to announce the world-first release* of LHTM-OPT, a lightweight Japanese large language model (LLM) released in October 2023, on the AWS Marketplace. We are also pleased to announce that we have started providing API services. 


*World-first release: As of 21 March, 2024, based on our own research. Release of Japanese LLM as a paid LLM for commercial use on AWS Marketplace



alt's LHTM-OPT is a lightweight large language model with high accuracy and processing speed. Since its release in October 2023, it has been used in various applications in Japan because it contains a large volume of Japanese data. This service is provided through our alt developer API service (alt Developer:


As a domestically produced private LLM model, LHTM-OPT can be immediately applied to the development of Japanese LLM applications such as automatic responses to questions in Japanese, retrieval-augmented generation, answers based on in-house knowledge bases, and machine translation. We also look forward to applying this service to a wide variety of proof-of-concept projects, and we hope that its launch will facilitate wider utilization in the Japanese-language LLM market.


The API is competitively priced at 12 yen/10,000 alt tokens.



【Overview of LHTM-OPT API Service】

■Start of provision: 21 March, 2024

■Price: 12 yen/10,000 alt tokens

■Usage: Development of Japanese LLM applications such as automatic response to questions in Japanese, RAG, answers based on in-house knowledge bases, machine translation, and more




LHTM-OPT is now also available on the AWS Marketplace  ( You can subscribe to LHTM-OPT via AWS Marketplace and easily deploy it to your own AWS environment. This is the first case of a Japanese company listing a machine learning model in AWS Marketplace.


alt is also currently providing consulting services for the development of private LLMs, customizing them to meet the unique needs of companies and supporting the development of LLMs specific to particular business operations.


We will continue to provide new value to society by developing and providing services utilizing large language models and generative AI to realize true DX in Japanese society.


For more information on contracted development of generative AI and DX projects utilizing LLMs, please reach out to the alliance contact point below.



▶For inquiries about LHTM-2/LHTM-OPT/GPT and other large language models solutions


Reference: alt Inc. introduces individual LLM development contracts for companies with 175 billion parameters, starting at approx. ¥2B: Providing optimal LLM construction in accordance with output needs, from several hundred million to over 175 billion parameters



alt Conference 2024 will be held!

Title:alt Conference 2024: The Shock of ZERO – AI and Humans: Change or Slavery?

Date:Thursday, March 28, 15:00-18:30

                Reception will be held after the closing session.

Venue:Bellesalle Tokyo Nihonbashi

               Tokyo Nihonbashi Tower B2, 2-7-1 Nihonbashi, Chuo-ku, Tokyo 103-6005

Access:Directly connected to Nihonbashi Station Exit B6 (Ginza, Tozai, & Asakusa Lines)


To register, please visit

※Early registration is recommended as limited seats remain.



■ About alt Inc.

Established in November 2014, alt Inc. is a venture firm with the mission of freeing humankind from non-creative/unproductive labor through the creation of P.A.I. ® (Personal Artificial Intelligence) and AI clones. We also develop and provide SaaS products such as AI GIJIROKU, which utilizes voice recognition technology born from the development of AI dialogue engines. As of September 2023, our cumulative funding has reached over 8 billion yen.



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