Stella AI Supports xAI's Latest AI Model "Grok 4.3"
SUPERNOVA Inc. has announced that its generative AI services, "Stella AI" and "Stella AI for Biz," will support xAI's latest AI model, "Grok 4.3," starting May 7, 2026. Grok 4.3 significantly enhances inference performance in agentic tasks, instruction following, and specialized domains like legal and finance.
📋 Article Processing Timeline
- 📰 Published: May 7, 2026 at 19:17
- 🔍 Collected: May 7, 2026 at 10:31
- 🤖 AI Analyzed: May 8, 2026 at 03:18 (16h 47m after Collected)
SUPERNOVA Inc. (Headquarters: Minato-ku, Tokyo; Representative Director and President: Token Kimoto; hereinafter, "the Company"), which develops generative AI services, will begin offering xAI's latest AI model "Grok 4.3" in its generative AI services "Stella AI" and "Stella AI for Biz" starting May 7, 2026 (Thursday).
Grok 4.3 is the latest inference model announced by xAI. Compared to the previous model "Grok 4.20," its inference performance in agentic tasks, instruction following, and specialized domains such as legal and finance has been significantly enhanced.
Key Features
Constant Inference Architecture: Unlike conventional arbitrary switching, it is designed to always go through an internal "thought process" for all responses, allowing for stable output even for complex instructions and multi-stage inference tasks.
Improved Performance in Agentic Tasks: The ability to execute multi-step practical tasks has been significantly improved from the previous model, and reliable behavior can be expected for applications that delegate part of business processes.
Expertise in Legal and Financial Fields: In evaluations by the independent assessment body Vals AI, it has recorded top-level performance in benchmarks for case law inference and corporate finance, possessing characteristics that make it easy to apply to specialized tasks such as contract review and financial analysis.
High Instruction Following and Low Hallucination Rate: In third-party evaluations, it has shown high consistency in following complex instructions and factual accuracy of responses.
Future Outlook
The Company will continue to promptly incorporate the latest AI models from various companies into "Stella AI" and "Stella AI for Biz," striving to provide a service experience where customers can select the optimal model according to their usage and business characteristics.
Generative AI technology is evolving daily, with new services emerging one after another. We will maximize the use of the latest technology to provide user-friendly, high-quality services to our customers, thereby contributing to the realization of a society where no one is left behind, serving as a bridge connecting technology and people.
■ Company Overview
Company Name: SUPERNOVA Inc.
Head Office Location: Sumitomo Fudosan Toranomon Tower 19F, 2-2-1 Toranomon, Minato-ku, Tokyo
Representative Director: Token Kimoto
Business Activities: Development and provision of services utilizing generative AI
Established: January 11, 2024
HP: https://supernova-inc.com
Corporate Inquiries: https://stella-ai.tayori.com/f/stella-ai-for-biz-inquiry
ISO/IEC 27001 certified (Certification registration number: SCC/INT/2505SN/11304)
Privacy Mark certified (Certification registration number: No. 17005217(01))
* "Grok 4.1 Fast" will cease to be offered on May 10, 2026, and "Grok 4.2" on May 7, 2026.
* "Stella AI" is a registered trademark of SUPERNOVA Inc.
* Other company names and product/service names mentioned in this press release are registered trademarks or trademarks of their respective companies.
Grok 4.3 is the latest inference model announced by xAI. Compared to the previous model "Grok 4.20," its inference performance in agentic tasks, instruction following, and specialized domains such as legal and finance has been significantly enhanced.
Key Features
Constant Inference Architecture: Unlike conventional arbitrary switching, it is designed to always go through an internal "thought process" for all responses, allowing for stable output even for complex instructions and multi-stage inference tasks.
Improved Performance in Agentic Tasks: The ability to execute multi-step practical tasks has been significantly improved from the previous model, and reliable behavior can be expected for applications that delegate part of business processes.
Expertise in Legal and Financial Fields: In evaluations by the independent assessment body Vals AI, it has recorded top-level performance in benchmarks for case law inference and corporate finance, possessing characteristics that make it easy to apply to specialized tasks such as contract review and financial analysis.
High Instruction Following and Low Hallucination Rate: In third-party evaluations, it has shown high consistency in following complex instructions and factual accuracy of responses.
Future Outlook
The Company will continue to promptly incorporate the latest AI models from various companies into "Stella AI" and "Stella AI for Biz," striving to provide a service experience where customers can select the optimal model according to their usage and business characteristics.
Generative AI technology is evolving daily, with new services emerging one after another. We will maximize the use of the latest technology to provide user-friendly, high-quality services to our customers, thereby contributing to the realization of a society where no one is left behind, serving as a bridge connecting technology and people.
■ Company Overview
Company Name: SUPERNOVA Inc.
Head Office Location: Sumitomo Fudosan Toranomon Tower 19F, 2-2-1 Toranomon, Minato-ku, Tokyo
Representative Director: Token Kimoto
Business Activities: Development and provision of services utilizing generative AI
Established: January 11, 2024
HP: https://supernova-inc.com
Corporate Inquiries: https://stella-ai.tayori.com/f/stella-ai-for-biz-inquiry
ISO/IEC 27001 certified (Certification registration number: SCC/INT/2505SN/11304)
Privacy Mark certified (Certification registration number: No. 17005217(01))
* "Grok 4.1 Fast" will cease to be offered on May 10, 2026, and "Grok 4.2" on May 7, 2026.
* "Stella AI" is a registered trademark of SUPERNOVA Inc.
* Other company names and product/service names mentioned in this press release are registered trademarks or trademarks of their respective companies.