Gemini 3.1 Flash-Lite Image vs Gemini 3.1 Pro (Preview)

Gemini 3.1 Flash-Lite Image (Google) versus Gemini 3.1 Pro (Preview) (Google): API pricing, context window, capabilities and uptime, from the same data as each model page, at the WandAPI default channel price. Input costs 0.5 Credits / M for Gemini 3.1 Flash-Lite Image and 4 Credits / M for Gemini 3.1 Pro (Preview), so Gemini 3.1 Flash-Lite Image is 88% cheaper.

Gemini 3.1 Flash-Lite Imagegemini-3.1-flash-lite-image
Google
Input (prompt)
0.5Credits / M
≈ $0.076
Output (completion)
3Credits / M
≈ $0.456
— context · — output70% off
Gemini 3.1 Flash-Lite Image details
Gemini 3.1 Pro (Preview)gemini-3.1-pro-preview
Google
Input (prompt)
4Credits / M
≈ $0.608
Output (completion)
24Credits / M
≈ $3.65
1M context · 64K output70% off
Gemini 3.1 Pro (Preview) details
Lower input price
Gemini 3.1 Flash-Lite Image
88% cheaper
More exclusive capabilities
Gemini 3.1 Pro (Preview)
Function Calling, Reasoning, Prompt Caching

Specs side by side

Item
Gemini 3.1 Flash-Lite Imagegemini-3.1-flash-lite-image
Gemini 3.1 Pro (Preview)gemini-3.1-pro-preview
Input (prompt) · Credits / M0.5≈ $0.0764≈ $0.608
Output (completion) · Credits / M3≈ $0.45624≈ $3.65
Cache read · Credits / M—0.4
Context window—1M
Max output—64K
7-day uptime—93.1%
Latest probe latency—3.4s
Measured throughput304.9 t/s5.1 t/s
ProtocolsGemini generateContentGemini generateContent / OpenAI Responses
Sample monthly cost (10M in + 2M out)11≈ $1.6788≈ $13.37

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 3.1 Flash-Lite ImageGemini 3.1 Pro (Preview)
Vision
Streaming
Function Calling
Reasoning
Prompt Caching
Response Schema
Audio
Video
File Input
Web Search
Realtime
Session
Media
Multipart Form
Binary Response

FAQ

Which is cheaper, Gemini 3.1 Flash-Lite Image or Gemini 3.1 Pro (Preview)?

At the WandAPI default channel price, Gemini 3.1 Flash-Lite Image input costs 0.5 Credits / M and Gemini 3.1 Pro (Preview) input costs 4 Credits / M, so Gemini 3.1 Flash-Lite Image is 88% cheaper. Output and cache prices are in the specs table above.

Can I switch between Gemini 3.1 Flash-Lite Image and Gemini 3.1 Pro (Preview) 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 3.1 Flash-Lite Image and Gemini 3.1 Pro (Preview) differ?

Only Gemini 3.1 Pro (Preview): Function Calling, Reasoning, Prompt Caching, Response Schema, Audio, Video. Every other capability is either supported by both or by neither; see the capability table above.

More comparisons

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One API key for both Gemini 3.1 Flash-Lite Image and Gemini 3.1 Pro (Preview)

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

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