Nano Banana vs Stable Diffusion

Nano Banana

If you came here for Imagen, it is gone: the Gemini API has shut the Imagen models down, Vertex AI lists their endpoints as discontinued, and the DeepMind page redirects to Nano Banana. What replaced it is a stronger editing-first family that keeps characters consistent, follows layout instructions and renders text, priced by the image at rates that undercut most rivals at the Lite tier. Pick it when you need editing and consistency inside a Google stack; look elsewhere if you need an open-weights model you can run yourself.

Pros

• +Three tiers from a cheap Lite model to a 4K Pro model, all under one API
• +Editing, multi-image reference and character consistency are first-class rather than bolted on
• +Readable in-image text, a weak spot of earlier generators
• +Free access in the Gemini app and AI Studio before any API spend

Cons

• −The Imagen name, SDK method and response format are retired, so existing integrations break
• −No free tier in the API for image models — every generated image is billed
• −Output carries Google's SynthID watermark and usage sits under Google's content policies
• −Pro-tier 4K images cost about seven times a Lite image

Stable Diffusion

The reason a local generation ecosystem exists at all, and still the right answer when you need weights on your own hardware with no per-image meter. Just be clear about what you are adopting: the models are open, the licence is not unconditional, and Stability's own commercial attention has moved to enterprise custom models and audio, with the public plan pages for its hosted apps now gone.

Pros

• +Weights genuinely run locally, so cost per image after hardware is electricity
• +The community licence explicitly permits derivative LoRAs and fine-tunes
• +An enormous body of community checkpoints, tooling and interfaces exists around these models
• +Hosted access exists through the developer platform and Amazon Bedrock for teams without a GPU

Cons

• −The $1M revenue threshold turns a free licence into a quote-only negotiation with no public price
• −The pricing URL redirects to a Brand Studio plans page that now returns 404; no public plan table remains
• −Hosted API prices sit behind a bot challenge on the developer platform, so budgeting needs a signed-in account
• −Running locally means owning the GPU, the updates and the safety tooling yourself

Is Nano Banana cheaper than Stable Diffusion?

Nano Banana starts at $0.0336/image. Stable Diffusion has a free tier; what its paid plans cost is not confirmed by us yet.

Does Nano Banana or Stable Diffusion have a free tier?

Both: Nano Banana has a free tier, and Stable Diffusion has a free tier.

Which has a public API, Nano Banana or Stable Diffusion?

Both ship a public API, so either can be built on; the fact table above shows the platforms each one runs on.