Migrating from gemini-2.5-flash-lite to gemini-3.1-flash-lite-preview

What changes when you move from gemini-2.5-flash-lite to gemini-3.1-flash-lite-preview: prices, limits, features and parameters, read from each company's own pages.

From: gemini-2.5-flash-lite
Status: Active
Shutdown: none announced
Time left: —

To: gemini-3.1-flash-lite-preview
Status: Retired
Shutdown: May 25, 2026 at the earliest
Time left: —

gemini-3.1-flash-lite-preview is itself retired. Its replacement is gemini-3.1-flash-lite.

Prices

USD per 1M tokens, standard tier

Type	gemini-2.5-flash-lite	gemini-3.1-flash-lite-preview	Change
Input	$0.10first seen October 1, 2026 · source	Not published	—
Cached input	$0.01first seen October 1, 2026 · source	Not published	—
Output	$0.40first seen October 1, 2026 · source	Not published	—

Other tiers, prompt-size bands and modalities are on each model's page.

Limits

Tokens

Limit	gemini-2.5-flash-lite	gemini-3.1-flash-lite-preview	Change
Context window	1,048,576 tokensin place when tracking began (October 6, 2026) · source	1,048,576 tokensin place when tracking began (October 6, 2026) · source	0%
Max output tokens	65,536 tokensin place when tracking began (October 6, 2026) · source	65,536 tokensin place when tracking began (October 6, 2026) · source	0%

Features and parameters

Compare models

Same on both

Structured outputs: supported on both.gemini-2.5-flash-lite: in place when tracking began (October 6, 2026) · source · gemini-3.1-flash-lite-preview: in place when tracking began (October 6, 2026) · source
Function calling: supported on both.gemini-2.5-flash-lite: in place when tracking began (October 6, 2026) · source · gemini-3.1-flash-lite-preview: in place when tracking began (October 6, 2026) · source
Prompt caching: supported on both.gemini-2.5-flash-lite: in place when tracking began (October 6, 2026) · source · gemini-3.1-flash-lite-preview: in place when tracking began (October 6, 2026) · source
Batch API: supported on both.gemini-2.5-flash-lite: in place when tracking began (October 6, 2026) · source · gemini-3.1-flash-lite-preview: in place when tracking began (October 6, 2026) · source
Image input: supported on both.gemini-2.5-flash-lite: in place when tracking began (October 6, 2026) · source · gemini-3.1-flash-lite-preview: in place when tracking began (October 6, 2026) · source
PDF input: supported on both.gemini-2.5-flash-lite: in place when tracking began (October 6, 2026) · source · gemini-3.1-flash-lite-preview: in place when tracking began (October 6, 2026) · source
Reasoning / thinking: supported on both.gemini-2.5-flash-lite: in place when tracking began (October 6, 2026) · source · gemini-3.1-flash-lite-preview: in place when tracking began (October 6, 2026) · source
Built-in web search: supported on both.gemini-2.5-flash-lite: in place when tracking began (October 6, 2026) · source · gemini-3.1-flash-lite-preview: in place when tracking began (October 6, 2026) · source

Not published for gemini-2.5-flash-lite: Fine-tuning, temperature parameter, top_p parameter, logprobs.

Not published for gemini-3.1-flash-lite-preview: Fine-tuning, temperature parameter, top_p parameter, logprobs.

Free tier

gemini-2.5-flash-lite: Free tier, in place when tracking began (October 7, 2026) (source) · All free models

gemini-3.1-flash-lite-preview: no free tier listed

Free access is lost: gemini-3.1-flash-lite-preview has no free tier listed.

Aliases

All aliases

No aliases point at either model.

On cloud platforms

All platform dates

Model	Platform	Platform ID	Shutdown	Time left
gemini-2.5-flash-lite	Google Cloud Vertex AI	gemini-2.5-flash-lite	Oct 20, 2026Active	5 days

Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.

Checklist

Change the model string from gemini-2.5-flash-lite to gemini-3.1-flash-lite-preview.

Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gemini-2.5-flash-lite, gemini-3.1-flash-lite-preview.