Is Gemini 3.1 Flash Image (Nano Banana 2) or Kimi K2.5 cheaper?

Gemini 3.1 Flash Image (Nano Banana 2) and Kimi K2.5 have comparable output pricing.

Which has the larger context window, Gemini 3.1 Flash Image (Nano Banana 2) or Kimi K2.5?

Kimi K2.5 has the larger context window (262K tokens).

Gemini 3.1 Flash Image (Nano Banana 2) vs Kimi K2.5

Both have similar output pricing, while Kimi K2.5 offers a larger context window. Choose Gemini 3.1 Flash Image (Nano Banana 2) or Kimi K2.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Gemini 3.1 Flash Image (Nano Banana 2)	Kimi K2.5
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$0.50	$0.60
Output / 1M tokens	$3.00	$3.00
Context window	131K	262K
Parameters	—	1T
Open weights	No	Yes
Released	May 2026	Jan 2026

Gemini 3.1 Flash Image (Nano Banana 2) details →Kimi K2.5 details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.