Nano Banana 2 introduced as Gemini 3.1 Flash Image Preview
Google announced Nano Banana 2 on February 18, 2026 and exposed the API billing entry as Gemini 3.1 Flash Image Preview. Official Gemini API pricing lists $0.30 per 1M text/image/video input tokens, $1.00 per 1M audio input tokens, $2.50 per 1M output tokens, and $0.039 per generated image.
Impact summary
Use explicit levels instead of abstract charts to judge this change.
- New Google image model entry: gemini-3.1-flash-image-preview
- Launch story: Nano Banana 2
- Pricing: $0.30 / MTok for text-image-video input, $1.00 / MTok for audio input, $2.50 / MTok output text, and $0.039 per output image
- Status: preview
- Run a small benchmark for image generation and image editing prompts you already use in production.
- Add cost guardrails for image-heavy workflows because image output billing is per generated image, not only per token.
Changes
Review changed fields first, then decide whether you need full before/after values.
Recommended Actions
Only actionable items stay prominent. Incomplete actions fall back to a compact list.
Benchmark Gemini 3.1 Flash Image Preview against your current image generation and editing baseline with a fixed prompt set.
Track preview pricing and output-image volume separately before broad rollout, because image output is billed per generated image.
Sources
Each source focuses on what it confirms, without repeating the whole article.
Pricing lists $0.30 input, $2.50 output, and $0.039 image output.