Stella AI Now Supports SpaceXAI's 'Grok 4.5'

SUPERNOVA Inc. (Headquarters: Minato-ku, Tokyo; President and CEO: Tokuken Kimoto; hereinafter "the company"), a developer of generative AI services, announces the launch of SpaceXAI's (formerly xAI) latest AI model 'Grok 4.5' on its generative AI platforms 'Stella AI' and 'Stella AI for Biz', starting Thursday, July 9, 2026.

Overview of Grok 4.5

'Grok 4.5' is SpaceXAI's flagship AI model, announced on July 8, 2026, local time. Designed to excel in coding, agent tasks, and knowledge work (intellectual tasks), it delivers performance comparable to Anthropic's Claude Fable and Claude Opus 4.8.

Key Features

- Professional-Grade Engineering Performance: Trained on datasets including coding, scientific, engineering, and mathematical knowledge, enabling high performance in real-world engineering tasks. - Strength in Knowledge Work: Ranked first in the legal domain benchmark 'Harvey Legal Agent Benchmark', making it highly suitable for document processing and specialized professional tasks. - High-Speed Response: Delivers approximately 80 tokens per second, with nearly double the token efficiency of leading contemporary models on equivalent tasks, ensuring a smooth and responsive user experience with minimal wait times.

Benchmark Comparison

The following is a benchmark comparison with major models based on SpaceXAI's published data.

※ Figures are based on SpaceXAI's published values (including measurements using harnesses from respective model providers). Source: https://x.ai/news/grok-4-5

Future Outlook

Generative AI technology continues to evolve rapidly, giving rise to new services at an unprecedented pace. We are committed to leveraging the latest technologies to deliver user-friendly, high-quality services, acting as a bridge between technology and people, and contributing to a society where no one is left behind.

Company Overview

- Company Name: SUPERNOVA Inc. - Headquarters: 19F, Sumitomo Fudosan Toranomon Tower, 2-2-1 Toranomon, Minato-ku, Tokyo - President and CEO: Tokuken Kimoto - Business: Development and provision of generative AI-powered services - Founded: January 11, 2024 - Website: https://supernova-inc.com - Business Inquiries: https://stella-ai.tayori.com/f/stella-ai-for-biz-inquiry - ISO/IEC 27001 Certified (Registration Number: SCC/INT/2505SN/11304) - Privacy Mark Certified (Registration Number: 17005217(01)) - Certified Operator for Digitalization and AI Introduction Subsidy 2026

* 'Stella AI' and 'Stella Craft' are trademarks or registered trademarks of SUPERNOVA Inc.

* Other company, product, and service names mentioned in this press release are trademarks or registered trademarks of their respective owners.