Model comparison

FLUX.2 Flex vs Gemini 3.1 Flash Image (Nano Banana 2)

Compare FLUX.2 Flex (Black Forest Labs) and Gemini 3.1 Flash Image (Nano Banana 2) (Gemini) by price, context, capabilities, and latency.

Price deadline

Gemini Flash prices rise Jan 1, 2027

Per Google's published pricing page, Gemini Flash input prices double on Jan 1, 2027. The same workload runs an order of magnitude cheaper on DeepSeek and GLM. Source: Google pricing Full price breakdown

Budget control

Worried about runaway spend? Every API key supports a monthly hard cap.

Which should you pick?

  • Price: roughly equal total cost ($0.2 / image per image).

Side by side

FLUX.2 Flex vs Gemini 3.1 Flash Image (Nano Banana 2) — full comparison

Compare price, provider, context, capabilities, latency, and source basis.

ModelProviderInputOutputContextCapabilitiesBest forLatencyStatusSource
FLUX.2 Flexblack-forest-labs/FLUX.2-flexBlack Forest Labs$0.2 / image——
StreamingVision
image understanding, multimodal chat0-0msCatalogPlatform curated
Gemini 3.1 Flash Image (Nano Banana 2)gemini/gemini-3.1-flash-imageGemini$0.151 / image——
StreamingVision
image understanding, multimodal chat0-0msCatalogPlatform curated

FAQ

FLUX.2 Flex vs Gemini 3.1 Flash Image (Nano Banana 2) FAQ

Is FLUX.2 Flex or Gemini 3.1 Flash Image (Nano Banana 2) cheaper?

Their total cost is roughly equal: $0.2 / image per image.

Which has a larger context window, FLUX.2 Flex or Gemini 3.1 Flash Image (Nano Banana 2)?

Both offer the same context window: — tokens.

FLUX.2 Flex vs Gemini 3.1 Flash Image (Nano Banana 2) for Vision: which should I pick?

Both target Vision. Pick FLUX.2 Flex to optimize cost, or FLUX.2 Flex for the longer context window. Test both on real prompts before committing production traffic.