Gemini 3 Flash Preview vs Gemini 3.1 Flash Image

Gemini 3 Flash Preview (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 SoleAPI default channel price. Input costs 0.8 Credits / M for Gemini 3 Flash Preview and 0.8 Credits / M for Gemini 3.1 Flash Image. Context windows are 1M and 128K.

Gemini 3 Flash Previewgemini-3-flash-preview
Google
Input (prompt)
0.8Credits / M
≈ $0.121
Output (completion)
4.8Credits / M
≈ $0.727
1M context · 64K output76% off
Gemini 3 Flash Preview details
Gemini 3.1 Flash Imagegemini-3.1-flash-image
Google
Input (prompt)
0.8Credits / M
≈ $0.121
Output (completion)
4.8Credits / M
≈ $0.727
128K context · 32K output76% off
Gemini 3.1 Flash Image details
Larger context
Gemini 3 Flash Preview
1M · 128K
More exclusive capabilities
Gemini 3 Flash Preview
Function Calling, Prompt Caching, Response Schema

Specs side by side

Item
Gemini 3 Flash Previewgemini-3-flash-preview
Gemini 3.1 Flash Imagegemini-3.1-flash-image
Input (prompt) · Credits / M0.8≈ $0.1210.8≈ $0.121
Output (completion) · Credits / M4.8≈ $0.7274.8≈ $0.727
Cache read · Credits / M0.08—
Context window1M128K
Max output64K32K
7-day uptime97.7%—
Latest probe latency1.74 s—
Measured throughput70.8 t/s78.9 t/s
ProtocolsAnthropic Messages / Gemini generateContentAnthropic Messages / Gemini generateContent
Sample monthly cost (10M in + 2M out)17.6≈ $2.6717.6≈ $2.67

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

FAQ

Which has the larger context window, Gemini 3 Flash Preview or Gemini 3.1 Flash Image?

Gemini 3 Flash Preview offers 1M tokens, Gemini 3.1 Flash Image offers 128K tokens.

Can I switch between Gemini 3 Flash Preview and Gemini 3.1 Flash 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 3 Flash Preview and Gemini 3.1 Flash Image differ?

Only Gemini 3 Flash Preview: Function Calling, Prompt Caching, Response Schema, Audio. 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 Flash Preview and Gemini 3.1 Flash Image

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

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Gemini 3 Flash Preview vs Gemini 3.1 Flash Image: API Pricing, Context & Capabilities | SoleAPI