AI Agent 'Writes, Measures, and Improves': Content Marketing Operation Tool 'sonata' Adds Article Improvement Analysis and Suggestion Function with Proprietary Metrics — Case Study Campaign Also Launched
opus LLC announced a major feature update for its AI interview article generation service 'sonata' on May 11, 2026. This update integrates the AI agent 'analyse,' which analyzes generated articles with proprietary metrics, implementing a self-improvement loop of 'writing → analysis → improvement suggestions.' This transforms content marketing from 'create and done' to an 'nurture-as-you-create' operation.
📋 Article Processing Timeline
- 📰 Published: May 11, 2026 at 21:30
- 🔍 Collected: May 11, 2026 at 13:02
- 🤖 AI Analyzed: May 12, 2026 at 00:30 (11h 28m after Collected)
opus LLC (Shibuya-ku, Tokyo; Representative Employee: Yusuke Arai) announced a major feature update for its AI interview article generation service 'sonata' on May 11, 2026. This update integrates the AI agent 'analyse,' which analyzes generated articles with proprietary metrics, implementing a self-improvement loop of 'writing → analysis → improvement suggestions.' This transforms content marketing from 'create and done' to an 'nurture-as-you-create' operation.
Background: On-site challenges that 'writing articles with AI' alone cannot solve
With the spread of generative AI, anyone can now 'write' articles. As a result, new challenges have emerged in corporate owned media operations.
Even if many articles are created, it's unclear which ones are being read.
It's impossible to quantify the quality difference between AI-written and human-written articles.
Points to improve from an SEO and AIO (AI Optimization) perspective are unclear.
Even after creating an article, it's difficult to determine 'what to fix next.'
opus hypothesizes that the bottleneck in content marketing is shifting from generation to 'operation and improvement'—and based on this, sonata is evolving from a mere article generation tool into a self-improving content marketing platform.
New Feature: Self-Improvement Loop by AI Agent
To solve the above challenges, opus has adopted a configuration where three AI agents collaborate in this sonata update.
Analysis agent with opus's proprietary 12 axes × GA4/Search Console
The analysis agent released this time evaluates owned media and corporate websites using opus's uniquely formulated 5 groups and 12 axes: Humanity / Multimodal / Personalization / AI-Readiness / Foundation. It scores them through two lenses—SEO/AIO contribution and branding contribution—to visualize whether the media is effective in the era of AI search.
Example of scores
In addition, integration with Google Analytics (GA4) and Google Search Console has been added. By integrating and analyzing these widely used tools, multi-faceted analysis is achieved.
Analysis agent 'analyse' also made publicly available
This analysis agent has been made publicly available not only within 'sonata' but also to a wider audience, under the name 'analyse,' for everyone operating owned media to utilize. By simply entering a URL, you can view a free evaluation report based on the 12 axes mentioned above, improvement points, and article planning suggestions.
URL: https://analyse.sonata-ai.app/
AI-powered article improvement suggestion function
For each article and each evaluation axis, the AI agent presents 'the next step' as concrete actions. It suggests to the user 'what to fix to improve what.'
Example of suggestions. Can be reflected in the article with one click.
Furthermore, by selecting the suggested improvements, you can edit the article with one click, immediately reflecting the improvement points. This completes a cycle where the improved article is continuously evaluated by sonata's analysis tools, integrated with GA4 and Search Console, and further refined.
Diverse Use Cases for 'sonata'
'sonata' can be widely used for general content marketing, as well as for all 'owned media' operated by many companies, including internal communications.
Recruitment PR / Employee Interviews
Continuously generate recruitment pages and employee interviews, and use analyse to measure 'company humanity (Humanity axis)' and 'how it resonates with readers.' This creates an operational loop for recruitment PR in the AI search era.
Case Studies / Customer Testimonials
Generate articles immediately from customer interview audio, and use analyse to evaluate branding contribution. Refine based on improvement suggestions to build case study content assets directly linked to sales and marketing.
Seminar Marketing
Deliver report articles immediately after a seminar from the speaker's audio. This solves the problem of 'reports coming two weeks after the seminar' and delivers content to prospects while their enthusiasm is still high.
Community / Fan Marketing
After holding user groups or fan meetings, immediately post the details to the community site. This shares the excitement of fans with those who couldn't attend.
Future Roadmap
Future releases are planned for features such as:
CMS integration function: 'Writing → Analysis →
Background: On-site challenges that 'writing articles with AI' alone cannot solve
With the spread of generative AI, anyone can now 'write' articles. As a result, new challenges have emerged in corporate owned media operations.
Even if many articles are created, it's unclear which ones are being read.
It's impossible to quantify the quality difference between AI-written and human-written articles.
Points to improve from an SEO and AIO (AI Optimization) perspective are unclear.
Even after creating an article, it's difficult to determine 'what to fix next.'
opus hypothesizes that the bottleneck in content marketing is shifting from generation to 'operation and improvement'—and based on this, sonata is evolving from a mere article generation tool into a self-improving content marketing platform.
New Feature: Self-Improvement Loop by AI Agent
To solve the above challenges, opus has adopted a configuration where three AI agents collaborate in this sonata update.
Analysis agent with opus's proprietary 12 axes × GA4/Search Console
The analysis agent released this time evaluates owned media and corporate websites using opus's uniquely formulated 5 groups and 12 axes: Humanity / Multimodal / Personalization / AI-Readiness / Foundation. It scores them through two lenses—SEO/AIO contribution and branding contribution—to visualize whether the media is effective in the era of AI search.
Example of scores
In addition, integration with Google Analytics (GA4) and Google Search Console has been added. By integrating and analyzing these widely used tools, multi-faceted analysis is achieved.
Analysis agent 'analyse' also made publicly available
This analysis agent has been made publicly available not only within 'sonata' but also to a wider audience, under the name 'analyse,' for everyone operating owned media to utilize. By simply entering a URL, you can view a free evaluation report based on the 12 axes mentioned above, improvement points, and article planning suggestions.
URL: https://analyse.sonata-ai.app/
AI-powered article improvement suggestion function
For each article and each evaluation axis, the AI agent presents 'the next step' as concrete actions. It suggests to the user 'what to fix to improve what.'
Example of suggestions. Can be reflected in the article with one click.
Furthermore, by selecting the suggested improvements, you can edit the article with one click, immediately reflecting the improvement points. This completes a cycle where the improved article is continuously evaluated by sonata's analysis tools, integrated with GA4 and Search Console, and further refined.
Diverse Use Cases for 'sonata'
'sonata' can be widely used for general content marketing, as well as for all 'owned media' operated by many companies, including internal communications.
Recruitment PR / Employee Interviews
Continuously generate recruitment pages and employee interviews, and use analyse to measure 'company humanity (Humanity axis)' and 'how it resonates with readers.' This creates an operational loop for recruitment PR in the AI search era.
Case Studies / Customer Testimonials
Generate articles immediately from customer interview audio, and use analyse to evaluate branding contribution. Refine based on improvement suggestions to build case study content assets directly linked to sales and marketing.
Seminar Marketing
Deliver report articles immediately after a seminar from the speaker's audio. This solves the problem of 'reports coming two weeks after the seminar' and delivers content to prospects while their enthusiasm is still high.
Community / Fan Marketing
After holding user groups or fan meetings, immediately post the details to the community site. This shares the excitement of fans with those who couldn't attend.
Future Roadmap
Future releases are planned for features such as:
CMS integration function: 'Writing → Analysis →