Gemini 2.5 Flash Image vs Gemini 3.1 Flash Image

Gemini 2.5 Flash Image (Google) versus Gemini 3.1 Flash Image (Google): API pricing, context window, capabilities and uptime, from the same data as each model page, at the WandAPI default channel price. Input costs 0.6 Credits / M for Gemini 2.5 Flash Image and 1 Credits / M for Gemini 3.1 Flash Image, so Gemini 2.5 Flash Image is 40% cheaper. Context windows are 64K and 128K.

Gemini 2.5 Flash Imagegemini-2.5-flash-image
Google
Input (prompt)
0.6Credits / M
≈ $0.0912
Output (completion)
5Credits / M
≈ $0.76
64K context · 32K output70% off
Gemini 2.5 Flash Image details
Gemini 3.1 Flash Imagegemini-3.1-flash-image
Google
Input (prompt)
1Credits / M
≈ $0.152
Output (completion)
6Credits / M
≈ $0.912
128K context · 32K output70% off
Gemini 3.1 Flash Image details
Lower input price
Gemini 2.5 Flash Image
40% cheaper
Larger context
Gemini 3.1 Flash Image
64K · 128K
More exclusive capabilities
Gemini 3.1 Flash Image
Reasoning, Video, File Input

Specs side by side

Item
Gemini 2.5 Flash Imagegemini-2.5-flash-image
Gemini 3.1 Flash Imagegemini-3.1-flash-image
Input (prompt) · Credits / M0.6≈ $0.09121≈ $0.152
Output (completion) · Credits / M5≈ $0.766≈ $0.912
Cache read · Credits / M——
Context window64K128K
Max output32K32K
7-day uptime——
Latest probe latency——
Measured throughput198.3 t/s125.7 t/s
ProtocolsGemini generateContentGemini generateContent
Sample monthly cost (10M in + 2M out)16≈ $2.4322≈ $3.34

Prices are the WandAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from WandAPI probes; a dash means the model is not probed yet.

Capabilities

CapabilityGemini 2.5 Flash ImageGemini 3.1 Flash Image
Vision
Streaming
Reasoning
Prompt Caching
Response Schema
Video
File Input
Web Search
Function Calling
Audio
Realtime
Session
Media
Multipart Form
Binary Response

FAQ

Which is cheaper, Gemini 2.5 Flash Image or Gemini 3.1 Flash Image?

At the WandAPI default channel price, Gemini 2.5 Flash Image input costs 0.6 Credits / M and Gemini 3.1 Flash Image input costs 1 Credits / M, so Gemini 2.5 Flash Image is 40% cheaper. Output and cache prices are in the specs table above.

Which has the larger context window, Gemini 2.5 Flash Image or Gemini 3.1 Flash Image?

Gemini 2.5 Flash Image offers 64K tokens, Gemini 3.1 Flash Image offers 128K tokens.

Can I switch between Gemini 2.5 Flash Image and Gemini 3.1 Flash Image at any time?

Yes. WandAPI calls every model with the same API key; switching is just changing the model field in the request, and billing is split per model in one console.

How do the capabilities of Gemini 2.5 Flash Image and Gemini 3.1 Flash Image differ?

Only Gemini 2.5 Flash Image: Prompt Caching, Response Schema. Only Gemini 3.1 Flash Image: Reasoning, Video, File Input, Web Search. Every other capability is either supported by both or by neither; see the capability table above.

More comparisons

Gemini 2.5 Flash Image vs Gemini 3 Pro ImageGemini 2.5 Flash Image vs Gemini 3.1 Flash-Lite ImageGemini 2.5 Flash Image vs Gemini 3.1 Pro (Preview)Gemini 2.5 Flash Image vs Gemini 3.5 FlashGemini 2.5 Flash Image vs Gemini 3.5 Flash-LiteGemini 2.5 Flash Image vs Gemini 3.6 FlashGemini 2.5 Flash Image vs Gemini 3.7 FlashGemini 3.1 Flash Image vs Gemini 3 Pro ImageGemini 3.1 Flash Image vs Gemini 3.1 Flash-Lite ImageGemini 3.1 Flash Image vs Gemini 3.1 Pro (Preview)Gemini 3.1 Flash Image vs Gemini 3.5 FlashGemini 3.1 Flash Image vs Gemini 3.5 Flash-Lite

One API key for both Gemini 2.5 Flash Image and Gemini 3.1 Flash Image

Free credits on sign-up, pay as you go, no monthly fee.

Get an API Key