Gemini 3.1 Flash Image (Preview) API

Model details

Context window

131K tokens

Max output

33K tokens

Input

Text, images

Output

Text, images

Capabilities

Vision, Streaming

Interfaces

OpenAI-style Image Generation, Image editing, OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses

Why teams pick it

• Gemini 3.1 Flash Image (Preview) for OpenAI-style Image Generation, Image editing, OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.

Call Gemini 3.1 Flash Image (Preview)

Gemini 3.1 Flash Image (Preview) answers on any of the APIs below — pick the one your code already speaks and just swap in your Inferray key.

curl https://api.inferray.com/v1/images/generations \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gemini-3.1-flash-image-preview",
  "prompt": "A quartz crystal on a workbench"
}'

curl https://api.inferray.com/v1/images/edits \
  -H "Authorization: Bearer inferray_..." \
  -F 'model=gemini-3.1-flash-image-preview' \
  -F 'prompt=Make the background blue' \
  -F 'image=@input.png'

curl https://api.inferray.com/v1/chat/completions \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gemini-3.1-flash-image-preview",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/messages \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gemini-3.1-flash-image-preview",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/responses \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gemini-3.1-flash-image-preview",
  "input": "Hello"
}'

More from Google

Alternatives to Gemini 3.1 Flash Image (Preview)

• Seedream 4.5Seedream 4.5 for OpenAI-style Image Generation, Image editing, OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.ByteDance
• Hy Image 3.5 PreviewHy Image 3.5 Preview for OpenAI-style Image Generation, Image editing, OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Tencent Cloud
• Grok Imagine ImageGrok Imagine Image for OpenAI-style Image Generation, Image editing.xAI

Questions about this model

How much does the Gemini 3.1 Flash Image (Preview) API cost?

Gemini 3.1 Flash Image (Preview) costs $0.045 per image at 0.5K, $0.067 per image at 1K, $0.101 per image at 2K, $0.151 per image at 4K on Inferray. That is the list price, with no gateway fee on top.

Is there a free tier for Gemini 3.1 Flash Image (Preview)?

No. You add credit and pay Gemini 3.1 Flash Image (Preview)'s list rate for each request — seats, projects, and API keys are free, and pay-as-you-go credit never expires.

Am I charged for failed requests?

No. A request that fails without returning a result is not billed. If a response fails part-way, the tokens already processed before the failure are charged.

Is Gemini 3.1 Flash Image (Preview) included in Token Plans?

No. Gemini 3.1 Flash Image (Preview) is pay-as-you-go only; Token Plans cover the other models in the catalog.

Is it the real Gemini 3.1 Flash Image (Preview)?

Yes. A request for gemini-3.1-flash-image-preview is answered by Gemini 3.1 Flash Image (Preview) from Google, billed at its published list price. Inferray never substitutes a different or smaller model.