Migrating from gemini-2.5-flash-lite-preview-09-2025 to gemini-3.1-flash-lite
What changes when you move from gemini-2.5-flash-lite-preview-09-2025 to gemini-3.1-flash-lite: prices, limits, features and parameters, read from each company's own pages.
- Status
- Retired
- Shutdown
- Mar 31, 2026 at the earliest
- Time left
- —
- Status
- Deprecated
- Shutdown
- May 7, 2027 at the earliest
- Time left
- 204 days
gemini-3.1-flash-lite is itself deprecated, shutting down May 7, 2027 at the earliest. Its replacement is gemini-3.5-flash-lite.
Prices
USD per 1M tokens, standard tier| Type | gemini-2.5-flash-lite-preview-09-2025 | gemini-3.1-flash-lite | Change |
|---|---|---|---|
| Input | Not published | $0.25first seen October 1, 2026 · source | — |
| Cached input | Not published | $0.025first seen October 1, 2026 · source | — |
| Output | Not published | $1.50first seen October 1, 2026 · source | — |
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | gemini-2.5-flash-lite-preview-09-2025 | gemini-3.1-flash-lite | Change |
|---|---|---|---|
| Context window | Not published | 1,048,576 tokensin place when tracking began (October 6, 2026) · source | — |
| Max output tokens | Not published | 65,536 tokensin place when tracking began (October 6, 2026) · source | — |
Features and parameters
Compare modelsNo feature is published for both models, so none can be compared.
Not published for gemini-2.5-flash-lite-preview-09-2025: Structured outputs, Function calling, Prompt caching, Batch API, Image input, PDF input, Reasoning / thinking, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs, Context window, Max output tokens.
Not published for gemini-3.1-flash-lite: Fine-tuning, temperature parameter, top_p parameter, logprobs.
Free tier
gemini-2.5-flash-lite-preview-09-2025: no free tier listed
gemini-3.1-flash-lite: Free tier, in place when tracking began (October 7, 2026) (source) · All free models
gemini-3.1-flash-lite adds a free tier.
Aliases
All aliasesNo aliases point at either model.
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| gemini-3.1-flash-lite | Google Cloud Vertex AI | gemini-3.1-flash-lite | not before May 7, 2027Active |
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-preview-09-2025togemini-3.1-flash-lite.
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-preview-09-2025, gemini-3.1-flash-lite.