Nano Banana (Gemini) vs ChatGPT Images in 2026

New comparison: Google shipped Nano Banana 2.1 in October 2026 and OpenAI shipped ChatGPT Images 2.5 in September 2026, making these the two main free image generators inside chatbots.

Updated Oct 26, 2026 · 10 sources checked

The short answer

Both are free to try and both are strong; the choice mostly depends on which assistant you already use.

Pick Nano Banana (Gemini) for editing your own photos, keeping a person or character consistent across edits, cheap high-volume API use, and 4K output
Pick ChatGPT Images for posters, infographics and anything with lots of text, multi-step creative edits, and people already paying for ChatGPT

At a glance

Nano Banana (Gemini)ChatGPT Images
Made byGoogleOpenAI
Starts at$4.99/moFree plan$8/moFree plan
All plansGemini app: free with limits. Google AI Plus $4.99/mo, Google AI Pro $19.99/mo ($199.99/yr), Google AI Ultra from $99.99/mo; paid plans unlock Nano Banana 2.1 and higher limits. API: Nano Banana 2.1 costs about $0.034 per 1K image, $0.050 per 2K, $0.113 per 4K.ChatGPT: Free (limited images), Go $8/mo, Plus $20/mo, Pro from $100/mo, billed monthly. API: gpt-image-2.5 models cost $8 per 1M image input tokens and $30 per 1M image output tokens (half price with Batch).
Best forEditing your own photos, keeping a person or character consistent across edits, cheap high-volume API use, and 4K outputPosters, infographics and anything with lots of text, multi-step creative edits, and people already paying for ChatGPT

How they score

Nano Banana (Gemini)ChatGPT Images
Speed
8
8
Privacy
5
6

Scores out of 10: our judgment from hands-on use and each vendor's published limits.

Nano Banana (Gemini)

by Google

Google's image generation and editing models inside the Gemini app, Google Search and Flow. Nano Banana 2.1 (October 2026) is the newest; Nano Banana Pro is still offered for specialized work.

Good

  • Free in the Gemini app, with cheap paid plans starting at $4.99/mo
  • Strong at conversational photo edits and keeping faces and characters consistent
  • Up to 4K output, with search-grounded generation for real-world details
  • One of the cheapest per-image APIs from a major lab (about $0.034 per 1K image for Nano Banana 2.1)
  • Built into Google Search, Flow and Google AI Studio

Watch out

  • Model names are confusing (Nano Banana, 2, 2.1, Pro, Gemini 3.1 Flash Image)
  • Best model and higher limits need a Google AI plan
  • No free tier for image models in the Gemini API
  • Older gemini-2.5-flash-image API model was shut down on October 2, 2026, so old code must migrate
Visit Nano Banana (Gemini) ↗

ChatGPT Images

by OpenAI

OpenAI's image generator inside ChatGPT, now on ChatGPT Images 2.5 (September 8, 2026). It replaced DALL-E. Developers use gpt-image-2.5-flare or gpt-image-2.5-sunburst in the API.

Good

  • Very good text rendering and complex layouts
  • Edits only what you ask and keeps earlier changes across many turns
  • Sketch, templates and comments placed directly on an image
  • Up to 50% faster than Images 2.0, per OpenAI
  • Two API models: Flare for speed and volume, Sunburst for precise creative work

Watch out

  • Free and Go plans have tighter image limits
  • The cheapest full-feature plan (Plus, $20/mo) costs more than Google AI Plus ($4.99/mo)
  • Max-quality Sunburst generations are slower
  • Stricter content rules for some subjects
Visit ChatGPT Images ↗
Our verdict

Both are free to try and both are strong; the choice mostly depends on which assistant you already use. Pick Nano Banana in Gemini if you mostly edit photos of real people, need 4K, or want the cheapest paid plan ($4.99/mo) or a low-cost API. Pick ChatGPT Images 2.5 if your images carry a lot of text (posters, menus, infographics) or you want Sketch and comment-based editing inside ChatGPT. Test the same prompt in both free tiers before paying.

Questions people ask

Is Nano Banana better than ChatGPT for images?

Neither wins at everything. Nano Banana is strong at editing photos while keeping faces consistent and goes up to 4K. ChatGPT Images 2.5 is strong at text-heavy designs and precise multi-step edits. Try the same prompt in both free versions.

Is Nano Banana free?

Yes, the Gemini app includes image generation and editing for free with limits. Google AI plans (Plus $4.99/mo, Pro $19.99/mo or $199.99/yr, Ultra from $99.99/mo) unlock Nano Banana 2.1 and higher limits.

Which is cheaper?

Google is cheaper at both levels. Its cheapest paid plan is $4.99/mo versus $8/mo for ChatGPT Go, and the Nano Banana 2.1 API costs about $0.034 for a 1K image. OpenAI's API charges $30 per 1M image output tokens, and the cost per image depends on size and quality.

What model does ChatGPT use for images now?

ChatGPT Images 2.5, released September 8, 2026 for all ChatGPT tiers. DALL-E 3 was retired from the API on May 12, 2026.

Can I use these images commercially?

Both Google and OpenAI let you use images you create, subject to their terms and usage policies. Both mark images as AI-generated (OpenAI uses C2PA metadata and invisible watermarks), so don't present them as real photos.

Sources (10), checked Oct 26, 2026

More ai image generation comparisons

vs
Midjourney vs DALL-E (now ChatGPT Images / GPT Image)
Midjourney: from $10/moDALL-E (now ChatGPT Images / GPT Image): from $8/mo
Updated Oct 26, 2026 →
vs
Midjourney vs Stable Diffusion
Midjourney: from $10/moStable Diffusion: Free
Updated Oct 26, 2026 →

New tools every week, tested.

Join 25,000+ readers getting the tools that worked, the ones that didn't, and the free PDF from every video.