Gemini 2.5 Flash Image vs Gemini 3.1 Flash Lite Image

Gemini 2.5 Flash Image (Google) versus Gemini 3.1 Flash Lite Image (Google): API pricing, context window, capabilities and uptime, from the same data as each model page, at the SoleAPI default channel price. Input costs 0.48 Credits / M for Gemini 2.5 Flash Image and 0.4 Credits / M for Gemini 3.1 Flash Lite Image, so Gemini 3.1 Flash Lite Image is 17% cheaper. Context windows are 64K and 64K.

Gemini 2.5 Flash Imagegemini-2.5-flash-image
Google
Input (prompt)
0.48Credits / M
≈ $0.0727
Output (completion)
4Credits / M
≈ $0.606
64K context · 32K output76% off
Gemini 2.5 Flash Image details
Gemini 3.1 Flash Lite Imagegemini-3.1-flash-lite-image
Google
Input (prompt)
0.4Credits / M
≈ $0.0606
Output (completion)
2.4Credits / M
≈ $0.363
64K context · 4K output76% off
Gemini 3.1 Flash Lite Image details
Lower input price
Gemini 3.1 Flash Lite Image
17% cheaper
More exclusive capabilities
Gemini 3.1 Flash Lite Image
Function Calling, Reasoning, Video

Specs side by side

Item
Gemini 2.5 Flash Imagegemini-2.5-flash-image
Gemini 3.1 Flash Lite Imagegemini-3.1-flash-lite-image
Input (prompt) · Credits / M0.48≈ $0.07270.4≈ $0.0606
Output (completion) · Credits / M4≈ $0.6062.4≈ $0.363
Cache read · Credits / M——
Context window64K64K
Max output32K4K
7-day uptime——
Latest probe latency——
Measured throughput128.7 t/s—
ProtocolsAnthropic Messages / Gemini generateContentAnthropic Messages / Gemini generateContent
Sample monthly cost (10M in + 2M out)12.8≈ $1.948.8≈ $1.33

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

Capabilities

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

FAQ

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

At the SoleAPI default channel price, Gemini 2.5 Flash Image input costs 0.48 Credits / M and Gemini 3.1 Flash Lite Image input costs 0.4 Credits / M, so Gemini 3.1 Flash Lite Image is 17% 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 Lite Image?

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

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

Yes. SoleAPI 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 Lite Image differ?

Only Gemini 2.5 Flash Image: Prompt Caching, Response Schema. Only Gemini 3.1 Flash Lite Image: Function Calling, Reasoning, Video. 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 2.5 FlashGemini 2.5 Flash Image vs Gemini 2.5 ProGemini 2.5 Flash Image vs Gemini 3 Flash PreviewGemini 2.5 Flash Image vs Gemini 3 Pro ImageGemini 2.5 Flash Image vs Gemini 3.1 Flash ImageGemini 2.5 Flash Image vs Gemini 3.1 Pro PreviewGemini 2.5 Flash Image vs Gemini 3.7 FlashGemini 3.1 Flash Lite Image vs Gemini 2.5 FlashGemini 3.1 Flash Lite Image vs Gemini 2.5 ProGemini 3.1 Flash Lite Image vs Gemini 3 Flash PreviewGemini 3.1 Flash Lite Image vs Gemini 3 Pro ImageGemini 3.1 Flash Lite Image vs Gemini 3.1 Flash Image

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

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

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