SunsetDiff

Replacement for gemini-3.1-flash-lite-preview: what changes when you switch

The official replacement is gemini-3.1-flash-lite. gemini-3.1-flash-lite-preview shut down on 2026-05-25 per Google Gemini API's deprecation page (checked 2026-10-17). The published context window changes from 1,048,576 tokens on gemini-3.1-flash-lite-preview to 1,048,576 tokens on gemini-3.1-flash-lite.

This is the canonical diff. Model page · Replacement page · Google Gemini API

gemini-3.1-flash-lite-preview to gemini-3.1-flash-lite

Some values not published Checked 2026-10-17.

Price per 1M tokens

Price comparison. Example monthly cost for 10M input tokens and 2M output tokens. Labeled example, not a bill.
FieldOldNewChange
Input Not published $0.25 Not published
Output Not published $1.5 Not published
Cached input Not published $0.025 Not published
Example monthly cost Not published $5.5 Example only

Context and max output

Token limits
LimitOldNewChange
Context window 1,048,576 1,048,576 0% (same)
Max output 65,536 65,536 0% (same)

Capabilities that differ

No differing capability values are published for both models.

API changes

No parameter change is listed on the official pages we checked. The sample below only swaps the model id.

Code

python before
from google import genai
client = genai.Client()
response = client.models.generate_content(
    model="gemini-3.1-flash-lite-preview",
    contents="Hello",
)
python after
from google import genai
client = genai.Client()
response = client.models.generate_content(
    model="gemini-3.1-flash-lite",
    contents="Hello",
)
typescript before
import { GoogleGenAI } from "@google/genai";
const ai = new GoogleGenAI({});
const response = await ai.models.generateContent({
  model: "gemini-3.1-flash-lite-preview",
  contents: "Hello",
});
typescript after
import { GoogleGenAI } from "@google/genai";
const ai = new GoogleGenAI({});
const response = await ai.models.generateContent({
  model: "gemini-3.1-flash-lite",
  contents: "Hello",
});
curl before
curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-3.1-flash-lite-preview:generateContent" \
  -H "x-goog-api-key: $GEMINI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"contents":[{"parts":[{"text":"Hello"}]}]}'
curl after
curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-3.1-flash-lite:generateContent" \
  -H "x-goog-api-key: $GEMINI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"contents":[{"parts":[{"text":"Hello"}]}]}'

Checklist

  1. Read the shutdown date for gemini-3.1-flash-lite-preview on the linked official page.
  2. Point your requests at gemini-3.1-flash-lite.
  3. Re-check price, context, and parameters on the provider pages linked here.
  4. Ship the change before the published shutdown date.

Questions

What is the replacement for gemini-3.1-flash-lite-preview?

The official replacement is gemini-3.1-flash-lite. gemini-3.1-flash-lite-preview shut down on 2026-05-25 per Google Gemini API's deprecation page (checked 2026-10-17). The published context window changes from 1,048,576 tokens on gemini-3.1-flash-lite-preview to 1,048,576 tokens on gemini-3.1-flash-lite.

Is gemini-3.1-flash-lite cheaper than gemini-3.1-flash-lite-preview?

A full price comparison is not published. One or both prices are missing from the official pages we checked.

Does gemini-3.1-flash-lite have a bigger context window than gemini-3.1-flash-lite-preview?

The context window stays 1,048,576 tokens.