比較一覧表
| 順位 | サービス名 | 料金 | 特徴 | 日本語対応 | プラン | 評価 |
|---|---|---|---|---|---|---|
| 1位 | DALL-E via ChatGPT Plus | $20/month | Natural language prompts, conversation-based editing | ◎ | 有料 | ★★★★☆ 4.5 |
| 2位 | DALL-E via ChatGPT Free | Free | Limited daily generations | ◎ | 有料 | ★★★★☆ 4.0 |
| 3位 | Midjourney Standard | $30/month | Superior aesthetic quality, Discord/web access | △ | 有料 | ★★★★☆ 4.8 |
| 4位 | Stable Diffusion | Free (open source) | Full local control, no content restrictions | ○ | 有料 | ★★★★☆ 4.0 |
ChatGPT Plus (includes DALL-E)
You’re chatting with ChatGPT about a blog post you’re writing, and you need a header image. Instead of spending 30 minutes searching stock photo sites, you type: “Create an image of a modern home office with warm lighting, a standing desk, and plants by the window.”
Ten seconds later, you have a custom image that perfectly matches your content. No stock photo watermarks, no licensing fees, no compromises.
That’s DALL-E — OpenAI’s image generation model, built directly into ChatGPT. It’s arguably the most accessible AI image tool available today, because if you already use ChatGPT, you already have it.
This guide covers everything a beginner needs to know: what DALL-E is, how to access it, how to write prompts that produce great results, practical use cases, and how it compares to alternatives like Midjourney.
What Is DALL-E?
DALL-E is an AI image generation model created by OpenAI, the same company behind ChatGPT. The name is a playful combination of “WALL-E” (the Pixar robot) and “Salvador Dali” (the surrealist painter).
The DALL-E Timeline
- 2021: DALL-E 1 — impressive but limited, not publicly available
- 2022: DALL-E 2 — first public release, revolutionary at the time
- 2023: DALL-E 3 — major quality leap, integrated into ChatGPT
- 2025-2026: Continued improvements, better text rendering, higher resolution, faster generation
What Makes DALL-E Unique
DALL-E’s defining advantage is its integration with ChatGPT. This creates a fundamentally different experience from other image generators:
- Conversational: You describe what you want in natural language, just like talking to a person
- Iterative: You can say “make the background darker” or “add a cat in the corner” without rewriting the entire prompt
- Context-aware: If you’ve been discussing a topic with ChatGPT, it understands the context when you ask for an image
- Intelligent interpretation: ChatGPT actually rewrites your casual description into an optimized prompt before sending it to DALL-E
That last point is important. When you type “a cute dog at the beach,” ChatGPT doesn’t just pass those words to DALL-E. It expands your request into a detailed, optimized prompt that produces a much better image than your brief description would suggest.
How to Access DALL-E
Through ChatGPT (Easiest Method)
DALL-E is built into ChatGPT — no separate app or account needed.
Free tier:
- Go to chatgpt.com
- Sign in or create an account
- In any conversation, ask ChatGPT to create an image
- You’ll get a limited number of generations per day
ChatGPT Plus ($20/month):
- Subscribe to ChatGPT Plus
- DALL-E is automatically available with higher generation limits
- Access to the latest model version
How to generate an image: Simply ask ChatGPT to create one. You don’t need special commands or syntax:
- “Create an image of…”
- “Generate a picture showing…”
- “Draw me a…”
- “Make an illustration of…”
ChatGPT will automatically use DALL-E when you ask for image creation.
Through the OpenAI API (For Developers)
Developers can access DALL-E directly through OpenAI’s API for integration into apps and services. This requires an OpenAI API account and is billed per image generated.
Through Microsoft Copilot
Microsoft’s Copilot also uses DALL-E for image generation. If you use Copilot, you’re already using DALL-E technology.
Creating Your First Image
Step 1: Start a Conversation
Open ChatGPT and type a request:
Create an image of a cozy reading nook by a rainy window,
with a steaming cup of tea and an open book
Step 2: Review the Result
ChatGPT will generate one image and display it in the conversation. Below the image, you’ll typically see a description of what was created.
Step 3: Refine and Iterate
This is where ChatGPT integration really shines. You can refine the image through conversation:
- “Make the lighting warmer”
- “Change the tea to coffee”
- “Add a sleeping cat on the chair”
- “Make it look more like a watercolor painting”
- “Can you zoom out to show more of the room?”
Each refinement builds on the previous image, so you’re progressively moving toward your vision.
Step 4: Download
Click on the generated image to view it full-size, then right-click and save, or use the download button.
Prompt Writing Guide
While ChatGPT handles much of the prompt optimization for you, understanding how to write effective prompts gives you more control over the output.
The Simple Approach (ChatGPT Does the Work)
The beauty of DALL-E through ChatGPT is that you can be casual:
I need a blog header image for an article about AI in healthcare.
Make it look modern and professional, with blue tones.
ChatGPT will interpret this, expand it into a detailed prompt, and generate something appropriate. For many use cases, this is all you need.
The Detailed Approach (You Take Control)
For more specific results, structure your prompt with these elements:
1. Subject and Action What is the main focus and what’s happening?
A female astronaut floating in zero gravity inside a space station
2. Setting and Background Where does the scene take place?
...inside a space station with Earth visible through a large window
3. Style and Medium What should it look like?
...digital illustration style, clean lines, vibrant colors
4. Lighting and Atmosphere What mood should it convey?
...warm interior lighting with cool blue Earth light coming through the window,
sense of wonder and exploration
5. Composition How should the image be framed?
...wide-angle view, subject slightly off-center, cinematic composition
Full prompt:
Create an image of a female astronaut floating in zero gravity inside a
space station, with Earth visible through a large window. Digital illustration
style with clean lines and vibrant colors. Warm interior lighting with cool
blue Earth light coming through the window, conveying a sense of wonder and
exploration. Wide-angle view with the subject slightly off-center,
cinematic composition.
Prompt Templates for Common Use Cases
Blog Header Images:
Create a blog header image for an article about [topic].
Style: [modern/minimalist/colorful/professional].
Color scheme: [colors].
Mood: [inviting/serious/playful/inspirational].
No text in the image.
Social Media Posts:
Create a [square/vertical/landscape] image for [Instagram/Twitter/LinkedIn]
about [topic]. Style: [bright and eye-catching/professional/casual].
Make it visually engaging with [specific elements].
Product Mockups:
Create a realistic product photo of [product description] on a
[background type]. Professional product photography style,
studio lighting, clean composition.
Presentation Slides:
Create a background image for a presentation slide about [topic].
Subtle, not too busy, with space for text overlay.
Color scheme: [colors]. Professional and clean.
Icons and Illustrations:
Create a simple [flat/3D/hand-drawn] illustration of [concept].
Minimalist style, [color palette], suitable for use as an icon
or infographic element.
Advanced Techniques
Technique 1: Style References
Describe the visual style you want by referencing well-known aesthetics:
- “In the style of a Pixar movie”
- “Like a Japanese woodblock print”
- “Retro 1960s advertising illustration”
- “Bauhaus design poster”
- “National Geographic wildlife photography”
- “Wes Anderson movie color palette”
Technique 2: Camera and Photography Terms
Using photography terminology gives DALL-E specific visual cues:
- “Shot from a bird’s eye view”
- “Close-up macro photograph”
- “Wide-angle lens distortion”
- “Shallow depth of field with bokeh background”
- “Long exposure light trails”
- “Drone aerial photograph”
Technique 3: Negative Instructions
Tell DALL-E what to avoid:
- “No text or words in the image”
- “No people in the scene”
- “Avoid dark or gloomy colors”
- “Without any brand logos”
Technique 4: Image Editing Through Conversation
One of DALL-E’s strongest features is conversational editing. After generating an image:
Selective changes:
- “Keep everything the same but change the sky to sunset colors”
- “Replace the chair with a bean bag”
- “Add snow falling”
Style adjustments:
- “Make this look more photorealistic”
- “Convert this to a pencil sketch style”
- “Apply a vintage film filter effect”
Composition changes:
- “Zoom in on the character’s face”
- “Show the same scene from a different angle”
- “Make it landscape orientation instead of portrait”
Technique 5: Seed Images and Variations
You can upload an existing image to ChatGPT and ask DALL-E to:
- “Create a similar image but with [changes]”
- “Generate a version of this in a different season”
- “Make an illustration version of this photograph”
- “Create a series of images matching this style”
This is powerful for maintaining visual consistency across multiple images.
Practical Use Cases with Examples
Use Case 1: Blog and Website Images
The problem: Stock photos are generic, expensive, or don’t quite match your content.
The solution: Generate custom images that perfectly match each piece of content.
Example prompt:
Create a hero image for a blog post titled "5 Ways to Boost Your
Morning Productivity." Show a bright, modern kitchen with morning sunlight
streaming in, a healthy breakfast on the counter, a planner open with
handwritten notes, and a laptop. Warm, optimistic color palette.
No text in the image. Photorealistic style.
Use Case 2: Social Media Content
The problem: Creating unique visual content daily is time-consuming and expensive.
The solution: Generate on-brand images for each post.
Example prompt:
Create a square Instagram post image showing a flat-lay arrangement
of productivity items: a MacBook, AirPods, a notebook with a pen,
a coffee cup, and a small succulent. Shot from directly above on a
clean white marble surface. Bright, airy, minimal aesthetic.
No text or logos.
Use Case 3: Presentation Visuals
The problem: Default PowerPoint clip art looks unprofessional; custom graphics are costly.
The solution: Generate sophisticated visuals for each slide.
Example prompt:
Create an abstract illustration representing artificial intelligence
in healthcare. Use a calming blue and teal color palette with subtle
white accents. Show interconnected nodes forming both a brain shape
and a medical cross symbol. Clean, modern, professional style suitable
as a presentation slide background with space for text overlay.
Use Case 4: Email Marketing
The problem: Email campaigns need eye-catching visuals, but design resources are limited.
The solution: Generate header images for each campaign.
Example prompt:
Create an email header image for a summer sale promotion.
Bright, cheerful colors (coral, yellow, turquoise).
Show abstract beach-themed elements: waves, sun rays, tropical leaves.
Modern and playful style. Wide format, 600x200 pixels proportion.
Leave space in the center for text overlay.
Use Case 5: Educational Materials
The problem: Textbooks and courses need illustrations to explain concepts.
The solution: Generate custom diagrams and conceptual illustrations.
Example prompt:
Create an educational illustration explaining how solar panels work.
Show a cross-section of a solar panel with sunlight hitting it,
labeled arrows showing photon absorption and electron flow,
connected to a simple house with a light bulb.
Clean, infographic style with a white background.
Use blue for the panel, yellow for sunlight, and green for electricity flow.
Use Case 6: Personal Projects
Custom wallpapers:
Create a desktop wallpaper of a serene Japanese zen garden at dawn,
with raked sand patterns, mossy rocks, and a single cherry blossom tree.
Soft pastel colors, peaceful atmosphere. 16:9 aspect ratio.
Gift ideas:
Create an illustration of a golden retriever wearing a birthday party hat,
sitting at a table with a small cake, looking excited.
Whimsical children's book illustration style, warm happy colors.
DALL-E vs. Midjourney: An Honest Comparison
This is the comparison most beginners want, so let’s be thorough and fair.
Image Quality
Midjourney generally produces more visually stunning, artistic images. Its output has a distinctive aesthetic polish — images tend to look like they were crafted by a skilled digital artist.
DALL-E produces cleaner, more literal interpretations of prompts. The images are technically good but may lack the artistic flair that Midjourney adds automatically.
Winner: Midjourney, for pure aesthetic appeal.
Ease of Use
DALL-E wins decisively here. You describe what you want in plain English through ChatGPT, and it handles the rest. Editing is conversational — “make it darker,” “add a mountain in the background.”
Midjourney requires learning a specific prompt syntax, understanding parameters like --ar and --s, and developing the skill of “prompt engineering.”
Winner: DALL-E, significantly more beginner-friendly.
Prompt Accuracy
DALL-E follows instructions more precisely. If you ask for “three red apples on a white table,” you’ll likely get exactly that.
Midjourney takes more creative liberty. You might get beautifully arranged apples on a rustic wooden table with dramatic lighting — gorgeous, but not what you specified.
Winner: DALL-E, for following precise instructions.
Text in Images
DALL-E has improved significantly and handles short text reasonably well in 2026.
Midjourney still struggles with text rendering.
Winner: DALL-E, though neither is perfect.
Pricing
| Feature | DALL-E (via ChatGPT Plus) | Midjourney Basic | Midjourney Standard |
|---|---|---|---|
| Price | $20/month | $10/month | $30/month |
| Includes | GPT-4o + DALL-E + more | Image generation only | Image generation only |
| Value | Excellent (bundled) | Good for images only | Best for heavy users |
Winner: DALL-E offers better value since ChatGPT Plus includes text AI, code help, and more. Midjourney Basic is cheaper if you only want image generation.
When to Use Each
Choose DALL-E when:
- You want the easiest possible experience
- You need precise, literal interpretations of your prompts
- You’re already paying for ChatGPT Plus
- You need images with text
- You want to iteratively refine images through conversation
- Your use case is practical (blogs, presentations, social media) rather than artistic
Choose Midjourney when:
- Aesthetic quality is your top priority
- You’re creating art, concept designs, or portfolio pieces
- You enjoy the creative process of prompt engineering
- You want to be part of a creative community
- You need specific artistic styles (fantasy, sci-fi, architectural visualization)
Use both when:
- You want the best of both worlds (many creators do)
- You want to compare outputs for important projects
- Different projects call for different strengths
Understanding DALL-E’s Limitations
What DALL-E Does Well
- Photorealistic scenes and objects
- Following specific, detailed instructions
- Generating consistent, clean compositions
- Creating practical images for business use
- Iterative editing through conversation
- Handling complex scenes with multiple elements
Current Limitations
1. Hands and Fine Details AI image generators still occasionally produce images with anatomical oddities — extra fingers, merged hands, or unusual proportions. This has improved dramatically but isn’t perfect.
Workaround: Specify hand positions in your prompt (“hands in pockets,” “arms crossed”) or avoid close-ups of hands.
2. Text Rendering While improved, text in images can still contain spelling errors, especially with longer phrases.
Workaround: Generate the image without text, then add text using Canva, Photoshop, or another design tool.
3. Consistency Across Multiple Images If you need a series of images with the same character or setting, DALL-E may produce variations that don’t look perfectly consistent.
Workaround: Use detailed character descriptions and reference previous images in the conversation. Or use the uploaded image reference technique.
4. Content Restrictions DALL-E has content policies that prevent generation of certain types of images:
- Real people’s likenesses (you can’t generate photos of celebrities)
- Violent or harmful content
- Explicit content
- Copyrighted characters
These restrictions exist for safety and legal reasons.
5. Resolution DALL-E generates images at standard resolutions. For very high-resolution needs (large format printing, billboard design), you may need to upscale using additional tools.
Workaround: Use AI upscaling tools like Topaz Gigapixel or free alternatives to increase resolution after generation.
Tips for Better Results
Tip 1: Let ChatGPT Help You Prompt
If you’re unsure how to describe what you want, just have a conversation:
“I need an image for my coffee shop’s Instagram. We’re a cozy, independent shop with an industrial-chic vibe. What kind of image would you suggest, and can you create it?”
ChatGPT will suggest ideas and then generate the image. This collaborative approach often produces better results than trying to write the perfect prompt yourself.
Tip 2: Be Specific About What Matters, Vague About What Doesn’t
If the background color is crucial, specify it. If you don’t care about the exact angle, don’t mention it. Over-specifying everything can actually limit DALL-E’s ability to create a cohesive image.
Tip 3: Use Reference Styles
Instead of trying to describe an exact visual style, reference something well-known:
- “In the style of a Pixar movie poster”
- “Like a page from a children’s picture book”
- “Reminiscent of a 1950s travel poster”
- “Similar to the aesthetic of the game Monument Valley”
Tip 4: Generate Multiple Versions
Don’t settle for the first image. Ask for variations:
- “Create another version with a different color palette”
- “Try the same concept but from a different angle”
- “Make a version that’s more abstract/realistic/minimalist”
Tip 5: Build a Prompt Library
When you find prompts that produce great results, save them. Over time, you’ll build a personal library of prompt templates for different use cases.
Tip 6: Use Aspect Ratio Specifications
Tell DALL-E the shape you need:
- “Create a wide landscape format image…” (16:9)
- “Create a tall portrait format image…” (9:16)
- “Create a square image…” (1:1)
Tip 7: Combine DALL-E with Design Tools
The most effective workflow for professional use:
- Generate the base image with DALL-E
- Edit in Canva, Photoshop, or Figma
- Add text, branding, overlays
- Adjust colors to match your brand guidelines
- Export in the correct format and size
Your First Week with DALL-E
Day 1: Casual Exploration Generate 10 images of things that interest you. Landscapes, food, animals, abstract art — anything. Get comfortable with the process.
Day 2: Practical Images Create images for something real: a social media post, a presentation, a profile picture background. Focus on utility.
Day 3: Style Exploration Take one concept (e.g., “a mountain lake”) and generate it in 5 different styles: photorealistic, watercolor, anime, minimalist, vintage.
Day 4: Conversational Editing Generate an image and spend time refining it through conversation. Make 5+ edits to see how iterative refinement works.
Day 5: Templates Create your own prompt templates for the types of images you need most often.
Day 6: Advanced Techniques Try uploading a reference image and asking for variations. Experiment with photography terminology and artistic style references.
Day 7: Create a Collection Generate a series of 5 related images (e.g., for a week of social media posts) that share a consistent visual style.
Final Thoughts
DALL-E through ChatGPT is the easiest way to get started with AI image generation. There’s no learning curve beyond what you already know — typing in English. The conversational interface means you can describe what you want naturally and refine it iteratively, just like working with a human designer (except it takes seconds instead of hours).
Is it the most aesthetically impressive AI image tool? Not always — Midjourney still produces more visually striking art in many cases. But for practical, everyday image creation — blog posts, social media, presentations, emails, personal projects — DALL-E hits the sweet spot of quality, ease of use, and value.
If you already have ChatGPT Plus, you’re already paying for DALL-E. If you don’t, the free tier gives you enough generations to see if AI image creation fits into your workflow.
The creative possibilities are genuinely exciting. Ideas that used to require a graphic designer, a stock photo budget, or artistic skill can now be visualized in seconds. The only limit is your ability to describe what you see in your mind’s eye — and even that isn’t much of a limit when ChatGPT is helping you along the way.
Open ChatGPT. Describe something you’d love to see. Watch it appear on your screen. That never stops being a little magical.
よくある質問(FAQ)
Can I use DALL-E for free?
Yes, ChatGPT's free tier includes limited DALL-E image generation. You can create a small number of images per day at no cost. For more generations and priority access, ChatGPT Plus at $20/month provides significantly higher limits.
Can I use DALL-E images commercially?
Yes, OpenAI's terms allow commercial use of images generated with DALL-E. You own the images you create and can use them for business purposes, marketing, products, and publications. However, you should review OpenAI's current usage policies and be aware that copyright law regarding AI-generated images is still evolving.
Is DALL-E better than Midjourney?
They excel at different things. DALL-E is easier to use because you can describe what you want in natural language through ChatGPT, and it's better at following precise instructions. Midjourney produces more aesthetically refined and artistic images. For beginners and practical use cases, DALL-E is more accessible. For artistic and creative projects, Midjourney often produces more striking results.
Can DALL-E generate text in images?
DALL-E has improved significantly at rendering text in images, but it's still not perfect. Short text (1-3 words) like logos or signs works reasonably well. Longer text often contains spelling errors or distorted characters. For images that require text, it's best to generate the image with DALL-E and add text using a design tool like Canva.
How many images can I generate per day?
The exact limits vary and are not publicly fixed. ChatGPT Free users can generate a limited number of images per day. ChatGPT Plus subscribers get significantly more generations — typically enough for most personal and professional use. Very heavy users may encounter rate limits during peak times.
関連トピック
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ChatGPT Team
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