Black Forest Labs: FLUX 3 Image Klein vs Google: Nano Banana 2.1
A side-by-side comparison of Black Forest Labs: FLUX 3 Image Klein ($0.03 / image) and Google: Nano Banana 2.1 ($5.25 / 1M tokens) using current USD prices and capabilities from the api14 catalog. Both run through the same OpenAI-compatible API.
Specifications
| Black Forest Labs: FLUX 3 Image Klein | Google: Nano Banana 2.1 | |
|---|---|---|
| Provider | Black Forest Labs | |
| Image output | $0.03 / image | $105.00 / 1M tokens |
| Input | - | $5.25 / 1M tokens |
| Output | - | $26.25 / 1M tokens |
| Web search | - | $49.00 / 1K searches |
| Context window | 46,864 | 65,536 |
| Max output | 42,177 | 58,982 |
| Input | text, image | image, text |
| Output | image | image, text |
| Tool calling | ||
| Structured output | ||
| Reasoning control | ||
| Added | Oct 15, 2026 | Oct 6, 2026 |
Key differences
- Google: Nano Banana 2.1 reads 1.4× more context (65,536 tokens).
- Only Google: Nano Banana 2.1 supports tool calling.
- Only Google: Nano Banana 2.1 supports structured JSON output.
- Only Google: Nano Banana 2.1 supports reasoning effort control.
Switch with one string
Both models use the same endpoint and request shape. Change the model value from "black-forest-labs/flux-3-image-klein" to "google/gemini-nano-banana-2.1" and prompts, streaming and tools keep working.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api14.com/api/v1",
apiKey: process.env.API14_API_KEY,
});
const result = await client.images.generate({
"model": "google/gemini-nano-banana-2.1",
"prompt": "A minimalist product photo of a ceramic mug on a wooden table",
"n": 1,
"aspect_ratio": "1:1"
});
import { writeFile } from "node:fs/promises";
await writeFile("image.png", Buffer.from(result.data[0].b64_json, "base64"));
More comparisons
- Black Forest Labs: FLUX 3 Image Klein vs Krea: K3 Edit
- Black Forest Labs: FLUX 3 Image Klein vs Qwen: Qwen Image 2.1 Pro
- Black Forest Labs: FLUX 3 Image Klein vs Qwen: Qwen Image 2.1 Turbo
- Google: Nano Banana 2.1 vs Krea: K3 Edit
- Google: Nano Banana 2.1 vs Qwen: Qwen Image 2.1 Pro
- Google: Nano Banana 2.1 vs Qwen: Qwen Image 2.1 Turbo
- Krea: K3 Edit vs Qwen: Qwen Image 2.1 Pro
- Krea: K3 Edit vs Qwen: Qwen Image 2.1 Turbo