Gemini 2.5 Flash vs Gemini 3.1 Flash Lite Image

Gemini 2.5 Flash (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 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 1M and 64K.

Gemini 2.5 Flashgemini-2.5-flash
Google
Input (prompt)
0.48Credits / M
≈ $0.0727
Output (completion)
4Credits / M
≈ $0.606
1M context · 64K output76% off
Gemini 2.5 Flash 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
Larger context
Gemini 2.5 Flash
1M · 64K
More exclusive capabilities
Gemini 2.5 Flash
Prompt Caching, Response Schema, Audio

Specs side by side

Item
Gemini 2.5 Flashgemini-2.5-flash
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 / M0.048—
Context window1M64K
Max output64K4K
7-day uptime——
Latest probe latency——
Measured throughput80.7 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 FlashGemini 3.1 Flash Lite Image
Vision
Function Calling
Reasoning
Streaming
Prompt Caching
Response Schema
Audio
Video
Web Search
File Input
Realtime
Session
Media
Multipart Form
Binary Response

FAQ

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

At the SoleAPI default channel price, Gemini 2.5 Flash 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 or Gemini 3.1 Flash Lite Image?

Gemini 2.5 Flash offers 1M tokens, Gemini 3.1 Flash Lite Image offers 64K tokens.

Can I switch between Gemini 2.5 Flash 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 and Gemini 3.1 Flash Lite Image differ?

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

More comparisons

Gemini 2.5 Flash vs Gemini 2.5 Flash ImageGemini 2.5 Flash vs Gemini 2.5 ProGemini 2.5 Flash vs Gemini 3 Flash PreviewGemini 2.5 Flash vs Gemini 3 Pro ImageGemini 2.5 Flash vs Gemini 3.1 Flash ImageGemini 2.5 Flash vs Gemini 3.1 Pro PreviewGemini 2.5 Flash vs Gemini 3.7 FlashGemini 3.1 Flash Lite Image vs Gemini 2.5 Flash ImageGemini 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 and Gemini 3.1 Flash Lite Image

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

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