Yukishi log.
With the rapid advancement of AI technology, two powerful AI assistants, “Gemini” and “Claude,” have emerged following ChatGPT. As an IT engineer who has subscribed to all three paid plans and uses Gemini and Claude in my daily work, I will provide a thorough comparison based on actual usage experience.
Through 6 months of intensive use across various scenarios including project management, code reviews, technical documentation, and system operations, I’ll share the “differences in usability between Gemini and Claude” and “their respective strengths and weaknesses” that a 44-year-old engineer has experienced, including comparisons with ChatGPT through specific examples.
✅ Gemini’s Strengths
Excellent in leveraging Google’s search capabilities, real-time information retrieval, multilingual processing, image/video analysis, and cost performance
✅ Claude’s Strengths
Excellent in logical thinking, long text processing (200,000 tokens), coding assistance, creative work, and ethical considerations
💻 For Engineers
Gemini for technical research and information gathering, Claude for design, implementation, and reviews
📊 Processing Capability Differences
Gemini emphasizes speed and freshness, Claude emphasizes accuracy and depth in design philosophy
💰 Cost Comparison
Gemini Advanced ¥2,900/month, Claude Pro ¥3,000/month, each with distinct characteristics
🎯 Selection Guidelines
Choose Gemini for immediacy and information gathering, Claude for quality and logical thinking
🔄 Practical Usage Division
Gemini for information gathering phase, Claude for thinking, design, and implementation phases
🤖 Gemini (Google) Characteristics
A multimodal AI developed by Google. Excels at leveraging vast search engine data and real-time information retrieval. Evolved from Bard with strong Google Workspace integration. Differentiated from ChatGPT through information freshness and search integration.
🧠 Claude (Anthropic) Characteristics
A conversational AI developed by Anthropic. Adopts unique safety methodology called “Constitutional AI,” emphasizing human-like dialogue and ethical judgment. Excels in long text understanding and generation, with advantages in logic and safety compared to ChatGPT.
📅 Release Timeline and Evolution
Gemini: December 2023 (Gemini 2.5 Pro in March 2025, Gemini 2.0 Experimental Advanced implementation)
Claude: July 2022 (Claude 4 Opus・Sonnet released May 22, 2025)
ChatGPT: November 2022 (Reference: GPT-4o in May 2024, o3 series in 2025)
💡 Differences in Development Philosophy
Gemini aims for “improved access to information” while Claude targets “safe and useful AI assistant,” representing fundamentally different approaches. This differs from ChatGPT’s “versatility and ecosystem expansion” vector of evolution.
📝 Long Text Processing
Claude: Up to 200,000 tokens (approximately 150,000 words)
Gemini: Up to approximately 32,000 tokens (approximately 24,000 words)
Reference: ChatGPT approximately 128,000 tokens
🎯 Writing Quality
When requesting technical documentation creation, Claude produces clearer logical structure and more readable text. Even compared to ChatGPT, Claude excels in compositional skills for specialized documents. Meanwhile, Gemini excelled in information comprehensiveness and currency.
🌐 Multilingual Support
Both have excellent Japanese support, but Gemini appears slightly superior in translation accuracy and naturalness. This difference is particularly noticeable in technical term translation, with expression capabilities equivalent to ChatGPT.
💻 Code Generation Quality
Testing with Python, JavaScript, and Java showed Claude excels at code generation based on understanding design philosophy, providing quality comparable to ChatGPT. Gemini excels at drawing from abundant sample code repositories, providing immediately functional code.
🔍 Debugging Support
Both are excellent at error analysis, but Claude sometimes surpasses ChatGPT in root cause analysis, while Gemini excels at searching similar cases and providing solutions.
📚 Technical Explanations
For learning new frameworks, Claude provides systematic explanations with educational effects equivalent to ChatGPT, while Gemini differentiates itself through presenting latest information and practical examples.
🔍 Real-time Information
Through Google Search integration, Gemini can instantly retrieve latest technical trends and market information, surpassing ChatGPT’s plugin-based information retrieval in this aspect. Claude provides responses based on training data up to April 2024.
📊 Information Reliability
Technical research comparison showed Gemini has high information freshness, while Claude excels in source verification and critical thinking analysis, providing reliability equivalent to ChatGPT.
🌏 Regional and Language-Specific Information
For Japanese technical communities and regulations, Gemini provides more detailed and current information, including region-specific information not available through ChatGPT.
📋 Requirements Documentation
For 20-page requirements documentation creation, Claude excelled in logical structure and comprehensiveness, with specialized document quality equal to or better than ChatGPT. Meanwhile, Gemini was strong at proposing content reflecting industry best practices and latest trends.
⏰ Schedule Management
For project planning, Claude provided quality comparable to ChatGPT in risk analysis and detailed planning, while Gemini differentiated through searching similar project cases and providing reference information.
👥 Team Management Support
For member communication support, Claude provided careful advice based on individual situations with human touch similar to ChatGPT, while Gemini’s strength lay in rapid information gathering and option presentation.
✍️ Article Structure and Planning
Claude excels at story composition understanding reader psychology, sometimes demonstrating creativity equivalent to ChatGPT. Gemini excels at keyword selection considering SEO perspectives and trends.
📝 Technical Explanation Articles
For explaining complex technical concepts, Claude provides systematic, understandable explanations with educational effects equivalent to ChatGPT, while Gemini’s strength lies in presenting latest implementation examples and reference links.
🔄 Article Rewriting and Improvement
For existing article improvement requests, Claude sometimes surpasses ChatGPT in logical text improvement, while Gemini excelled in adding latest information and SEO optimization suggestions.
🚨 Incident Response
For emergency troubleshooting, Gemini’s information search speed and real-time information retrieval demonstrated power, sometimes surpassing ChatGPT’s plugin functionality. Claude excelled in root cause analysis and recurrence prevention planning.
📊 Log Analysis Support
For large log file analysis, Claude showed accuracy comparable to ChatGPT in pattern recognition and anomaly detection, while Gemini excelled at searching similar incident cases and providing solutions.
🔒 Security Measures
For security incident response, Claude provided careful analysis and multi-faceted consideration with safety awareness equivalent to ChatGPT, while Gemini differentiated through presenting latest threat information and countermeasure methods.
💰 Gemini Pricing Structure
Free version: Monthly usage limits (sufficiently practical)
Gemini Advanced: ¥2,900/month (Google One AI Premium plan)
API usage: Pay-per-use (approximately ¥150 per 1M input tokens)
Excellent cost performance compared to ChatGPT Plus (¥3,000/month)
💳 Claude Pricing Structure
Free version: Monthly message limits
Claude Pro: $20/month (approximately ¥3,000)
API usage: Pay-per-use (approximately ¥450 per 1M input tokens)
Same price as ChatGPT Plus but differentiated by long text processing capability
📊 6-Month Actual Usage Cost Analysis
Subscribing to both Gemini Advanced and Claude Pro resulted in approximately ¥6,000/month investment. With all three including ChatGPT Plus, it’s approximately ¥9,000/month, but sufficient value can be obtained with just Gemini and Claude.
🎯 Cost Performance by Use Case
Gemini Advanced alone is sufficient for daily work, add Claude Pro for precise analysis and long text processing. Consider all three subscriptions including ChatGPT only when creativity is also important.
🔄 API Usage Comparison
For system integration requiring large-scale processing, Gemini is overwhelmingly cheaper. For 1M token processing per month: Gemini ¥150, Claude ¥450, ChatGPT ¥750. Cost increase for Claude is justified when processing quality is prioritized.
🚀 Gemini’s Overwhelming Information Advantage
Real-time information retrieval capability is overwhelming, allowing no competition from other AIs including ChatGPT in technical trend research and market analysis. Integration with Google Workspace enables integrated use with emails and documents, with top-level cost performance.
💡 Response Speed and Search Integration
Short time from question to answer, excelling at real-time information search and integration. Sometimes surpasses ChatGPT’s plugin functionality in emergency troubleshooting and rapid decision support, with excellent daily work usability.
🧠 Claude’s Logical Thinking Power
Takes a step-by-step approach similar to human thought processes in analyzing complex problems and developing solutions. Particularly powerful in engineering design philosophy and requirements definition, with reliable responses equivalent to or better than ChatGPT.
📝 Overwhelming Advantage in Long Text Processing
200,000 token long text processing capability is overwhelming, significantly surpassing ChatGPT’s 128,000 tokens. Enables consistent responses maintaining context in large document analysis and long-term project planning.
🔍 Depth of Expertise and Ethics
Excels at specialized advice based on fundamental understanding rather than superficial information provision. Receive reliable proposals equivalent to or better than ChatGPT in IT architecture selection and technical decisions, with excellent ethical considerations.
⚠️ Gemini’s Accuracy and Depth Limitations
While information freshness is high, information verification can sometimes be insufficient. Also, deep specialized discussions may remain superficial, requiring supplementation in scenarios needing creativity or critical thinking like ChatGPT.
🐌 Claude’s Response Speed and Real-time Capability
Due to careful analysis, responses can take longer compared to Gemini. Also, training data freshness is inferior, requiring combination with Gemini or ChatGPT for latest technology trends.
📅 Information Freshness Gap
Claude is based on training data up to April 2024, making it inferior to Gemini for latest technical trends and market information. Information freshness consideration is necessary for new technology research, including ChatGPT.
💸 Respective Functional Limitations
Gemini has long text processing limitations, while Claude cannot retrieve real-time information. Without plugin ecosystems like ChatGPT, functional shortages may be felt for specific uses. Considering both subscriptions requires approximately ¥6,000/month burden.
🔄 Learning Cost for Usage Division
Understanding the characteristics of two AIs and using them appropriately requires considerable learning time. Coming from ChatGPT, it took 1-2 months to understand the differences in their characteristics.
🔍 Information Gathering and Research Phase
Gemini is optimal for new technology research, competitor analysis, and latest security information gathering. Leveraging real-time capabilities and information comprehensiveness not available through ChatGPT for initial research, you can determine project direction.
🏗️ Design and Planning Phase
Claude is optimal for system architecture design, project planning, and technology selection decisions. Using logical thinking and deep analytical power equivalent to or better than ChatGPT for strategic decision support, you can build the foundation for project success.
⚙️ Implementation and Operations Phase
Using Claude for code reviews, documentation, and quality management, and Gemini for troubleshooting, information search, and rapid decisions, I achieved development efficiency equivalent to or better than combined ChatGPT usage.
📊 Recommended Phased Introduction Strategy
Based on 19 years of career experience as a 44-year-old engineer, I recommend: ①First experience efficiency improvement in information gathering with Gemini Advanced (¥2,900/month), ②Add Claude Pro (¥3,000/month) when precise analysis or long text processing is needed, ③Consider ChatGPT Plus when creativity is important for work.
🎯 Recommended AI by Job Type
System operations staff should focus on Gemini, architects/designers on Claude, product managers should use ChatGPT combination, and full-stack engineers should use Gemini and Claude hybrid utilization most effectively in my experience.
Overall Rating: ⭐⭐⭐⭐ (4.3/5)
Gemini: ⭐⭐⭐⭐ – Excellent in cost performance and information freshness, somewhat lacking in deep analysis
Claude: ⭐⭐⭐⭐⭐ – Highest level in logic and accuracy, challenges in speed and information freshness
💼 Impact on Work Efficiency
Properly using Gemini and Claude reduced traditional work time by approximately 35%. While slightly less than the 40% reduction with ChatGPT combination, sufficient efficiency was achieved with two AIs. Efficiency improvement in documentation, technical research, and design reviews was dramatic.
🎯 Recommended Order for Beginners
①Experience basic efficiency with Gemini Advanced (¥2,900/month)
②Add Claude Pro (¥3,000/month) for advanced analysis as needed
③Consider ChatGPT Plus when creativity becomes important
🏆 Final Selection Guidelines
Through 6 months of actual operation as an engineer, I’m convinced that “significant productivity improvement can be achieved just by using Gemini and Claude appropriately.” While ChatGPT’s creativity is attractive, the combination of Gemini for information gathering and Claude for precise analysis provides a sufficiently powerful weapon for modern engineers.
This article contains affiliate advertising. The products and services introduced have been recommended after actual use and research.
✅ Gemini Recommended For
Information gathering focus, cost-conscious, seeking daily work efficiency, Google Workspace users, wanting to constantly catch up with latest technology trends
✅ Claude Recommended For
Requiring precise analysis, frequent long text processing, design/architect work, emphasizing logical thinking, prioritizing quality above all
❌ Gemini Not Recommended For
Seeking deep specialized analysis, emphasizing creativity, needing long text processing, prioritizing logical consistency above all
❌ Claude Not Recommended For
Speed priority, latest information essential, real-time processing required, cost as top priority
💡 Advice from a 44-Year-Old Engineer
From my perspective as someone who transitioned from family restaurant manager to IT engineer specializing in project management, AI tools are not “replacements for people” but “extensions of human capabilities.” In the wave of AI utilization that began with ChatGPT’s emergence, Gemini and Claude each provide different values.
🚀 Investment Value for the Future
While the monthly ¥6,000 investment is not cheap, it pays off sufficiently considering skill improvement and work efficiency. Particularly in improving side blog quality and web application development efficiency, sufficient effects can be felt even without ChatGPT combination. AI utilization skills will become essential elements in future engineering careers.
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