ChatGPT Images vs Nano Banana: Which AI Image Generator Fits You in 2026
OpenAI versus Google. How ChatGPT Images and Gemini's Nano Banana compare on free use, plans, API cost, editing and terms.
By , research by the BestBots team · Updated Oct 18, 2026
Fact checked against each company's published pricing, documentation and verified user ratings. How we score
Pick ChatGPT Images if you want the most capable conversational editor and already pay for ChatGPT Plus. Pick Nano Banana if you want the best free image generator, the cheapest upgrade ($4.99 Google AI Plus) and the lowest API price at 1K and 2K. It is close: ChatGPT wins on editing workflow, Nano Banana on cost.
Side by side
| Spec | ChatGPT Images (GPT Image) | Nano Banana (Gemini image) |
|---|---|---|
| BestBots Score | 4.6 | 4.5 |
| Starting price | $0 | $0 |
| Pricing model | subscription | subscription |
| Free trial | None listed | None listed |
| Free plan | Yes, limited image creation on ChatGPT Free | Yes, Nano Banana 2 in the free Gemini app with daily limits |
| Paid from | $8 per month (Go); Plus $20 | $4.99 per month (Google AI Plus) |
| Images per month | Not published; Pro is listed as unlimited, subject to abuse guardrails | Daily quota not published; Plus 2x, Pro 4x, Ultra 5x or 20x Pro limits |
| Commercial use | Yes; OpenAI's terms assign you its rights in Output | Google's terms say it won't claim ownership of generated content |
| Max resolution | API: up to 3840 px per edge and 8.3M pixels (4K); above 2560 x 1440 is experimental | App: 2K download on AI plans, 1K free; API: 4K (4096 x 4096) |
| Editing tools | Conversational edits, selection tool, templates, sketch to image, any aspect ratio | Local edits, multi image blends, character consistency, Redo with Nano Banana Pro, Google Photos editing (US, 18+) |
| API | Yes, GPT Image 2.5 Sunburst and Flare; GPT Image 2 from about $0.006 per image | Yes, Gemini API from about $0.034 per 1K image |
The short answer
- Choose ChatGPT Images for multi step edits by conversation, templates, images with thinking on Plus, and private, opt out friendly defaults.
- Choose Nano Banana for free daily use, photo edits with consistent faces, Google Photos, and the cheapest paid tier and API.
Pricing
| ChatGPT Images | Nano Banana | |
|---|---|---|
| Free | Limited image creation | Nano Banana 2, standard limits, 1K downloads |
| Cheapest paid | Go $8 per month | Google AI Plus $4.99 per month (2x limits) |
| Mid tier | Plus $20, images with thinking | AI Pro $19.99, 4x limits |
| Top tier | Pro $100 to $500, unlimited and faster | AI Ultra $99.99 or $199.99, 5x or 20x Pro |
| Best model access | Images with thinking on Plus, Pro, Business | Redo with Nano Banana Pro on all AI plans |
| Downloads | Any aspect ratio | 2K on AI plans, 1K free |
API per image:
| Size | GPT Image 2 (low / medium / high) | Nano Banana 2.1 | Nano Banana Pro |
|---|---|---|---|
| 1K square | $0.006 / $0.053 / $0.211 | $0.0336 | $0.134 |
| 2K | Billed by tokens | $0.0504 | $0.134 |
| 4K | Billed by tokens (up to 3840 px edge) | $0.113 | $0.24 |
From OpenAI's image guide and Gemini API pricing, October 2026. GPT Image 2.5 bills $30 per million image output tokens. Both batch modes are half price.
Models and features
| ChatGPT Images 2.5 | Nano Banana 2 and Pro | |
|---|---|---|
| Released | September 8, 2026 | Nano Banana 2.1 is an update to Nano Banana 2 |
| Editing | Conversation, selection tool, mobile edit and comments | Local edits, multi image blends, Redo with Pro |
| Consistency | OpenAI notes recurring characters can drift | Character consistency is a listed strength; avatars |
| Text | Adds text on request; precise placement can struggle | Better text rendering in all supported languages; Pro for detail |
| Extras | Templates, sketch to image, transparent backgrounds | Google Photos editing (US), Personal Intelligence |
| Provenance | C2PA and SynthID | Google verification tools in Gemini |
| Age | Parental controls for teen accounts | 18+ to edit, 13+ to generate |
Head to head scenarios
Free everyday images
Winner: Nano Banana. The full Nano Banana 2 model is on the free plan, and Google AI Plus at $4.99 is the cheapest meaningful upgrade in the category.
Iterating on a marketing graphic
Winner: ChatGPT Images. Conversational context, templates that ask follow up questions, and images with thinking on Plus suit many rounds of revisions.
Editing a family photo
Winner: Nano Banana. Local edits, face consistency and direct Google Photos access for US adults are built for this.
Infographic with labels
Winner: Nano Banana. Google lists improved world knowledge for diagrams and infographics and better text rendering on the free Nano Banana 2, and Nano Banana Pro is one $4.99 upgrade away. ChatGPT's images with thinking competes here but needs Plus at $20.
API at scale
Winner: Nano Banana. At 1K and 2K, Nano Banana 2.1 costs less per image than GPT Image 2 at medium quality, and goes to 4K for $0.113. GPT Image 2 at low quality ($0.006) is cheapest for drafts.
Privacy conscious users
Winner: ChatGPT Images. OpenAI offers a training opt out, while Gemini keeps human reviewed chats for up to three years even after you delete activity.
Privacy
OpenAI's terms offer a training opt out, Business and Enterprise do not train on business data by default, and every image carries C2PA and SynthID. Google's Gemini Apps Privacy Hub says a subset of chats is reviewed by humans, reviewed chats are kept up to three years, and Keep Activity controls whether data improves Google AI. On the paid Gemini API, Google lists prompts as not used to improve its products.
Commercial rights
OpenAI: you own Output and OpenAI assigns its rights, output may not be unique, and you may not present it as human made. Google: it won't claim ownership of content you generate; you may not mislead people into thinking AI content is human made or use output to develop machine learning models. Neither publishes consumer IP indemnity. Both are workable for commercial use.
Verdict
Nano Banana wins on value: the best free tier, a $4.99 upgrade and cheaper API images. ChatGPT Images wins on workflow: conversational edits, templates and thinking mode, with stronger privacy defaults. If you pay for ChatGPT Plus already, use ChatGPT; if you pay nothing, start with Gemini. Read the ChatGPT Images review and Nano Banana review.
Frequently asked questions
Is Nano Banana better than ChatGPT for images?
For free use, photo edits and cheap API volume, Nano Banana has the edge on published facts. For conversational iterative editing, templates and reasoning before drawing on Plus, ChatGPT Images is stronger. Both handle text in images, with Nano Banana Pro and ChatGPT's thinking mode aimed at the hardest layouts.
Which is free, ChatGPT or Gemini image generation?
Both. ChatGPT Free includes limited image creation, and the free Gemini app includes Nano Banana 2 with standard limits and 1K downloads. Neither publishes a daily number.
Which is cheaper to upgrade?
Google AI Plus at $4.99 a month, which doubles free limits, unlocks 2K downloads and adds Redo with Nano Banana Pro. ChatGPT Go is $8 with more image creation, and Plus at $20 adds images with thinking.
Which API is cheaper per image?
At 1K, Nano Banana 2.1 is about $0.0336 per image and GPT Image 2 is about $0.053 at medium quality or $0.006 at low. At 4K, Nano Banana 2.1 is about $0.113. Both offer batch processing at half price.
Which is better for editing my photos?
Nano Banana for quick realistic edits of your own photos and keeping a face consistent, plus Google Photos editing for US adults. ChatGPT for multi step edits in conversation and the selection tool. Gemini requires users to be 18 or older to edit images.
Which is more private?
ChatGPT lets you opt out of training and never shows images in a public gallery. Gemini uses activity to improve Google AI depending on your Keep Activity setting, and a subset of chats is reviewed by humans and kept up to three years. On paid APIs, both say they do not train on your data by default.