Gemini 3.1 Flash Lite Preview retirement date: May 25, 2026
Retired on May 25, 2026; requests to gemini-3.1-flash-lite-preview now fail.
- Provider
- Google (Gemini API)
- Model IDs affected
gemini-3.1-flash-lite-preview- Shutdown date
- May 25, 2026
- Replacement
- gemini-3.1-flash-lite
- Platforms
- Dates apply to the Gemini API and are the earliest possible shutdown dates Google publishes. If you use Gemini through another platform, check that platform's own schedule.
- Source
- Official Google (Gemini API) deprecations page (data last changed 2026-11-02, re-checked daily)
Gemini 3.1 Flash Lite Preview vs Gemini 3.1 Flash Lite: price and limits
| Gemini 3.1 Flash Lite Preview | Gemini 3.1 Flash Lite | Change | |
|---|---|---|---|
| Context window (tokens) | 1,048,576 | 1,048,576 | 0% |
| Max output (tokens) | 65,536 | 65,536 | 0% |
| Input, $ per 1M tokens | $0.25 | $0.25 | 0% |
| Output, $ per 1M tokens | $1.50 | $1.50 | 0% |
| Cache read, $ per 1M tokens | $0.03 | $0.03 | 0% |
Prices and limits from models.dev (checked 2026-11-02). Confirm on the official pricing page. Compare the cost for your traffic in the old vs new model calculator.
Migrating from Gemini 3.1 Flash Lite Preview to Gemini 3.1 Flash Lite
Not yet reviewed. We haven't written model-specific migration notes for Gemini 3.1 Flash Lite Preview yet. Start with the provider's official guidance and the replacement's model page, and use this general checklist:
- Search your code, config and environment variables for
gemini-3.1-flash-lite-preview. - Re-run your evaluation set against gemini-3.1-flash-lite before switching traffic.
- Recount tokens with the new model's tokenizer and re-check
max_tokens, context fit and cost. - Check tool calling, structured output and stop sequences on your real prompts.
- Dates apply to the Gemini API and are the earliest possible shutdown dates Google publishes. If you use Gemini through another platform, check that platform's own schedule.
Check your code before May 25
All model retirements · All Google (Gemini API) deprecations
FAQ
When was Gemini 3.1 Flash Lite Preview retired?
Gemini 3.1 Flash Lite Preview (gemini-3.1-flash-lite-preview) was retired on the Gemini API on May 25, 2026, according to the official Gemini API deprecations page. Requests to it now fail.
What should I use instead of gemini-3.1-flash-lite-preview?
The recommended replacement is gemini-3.1-flash-lite.
What happens to gemini-3.1-flash-lite-preview requests after the shutdown date?
After a model is retired, API requests to it return an error. Move traffic to the replacement and test it on your own prompts before the date.
Does this date apply to Amazon Bedrock, Vertex AI or Azure?
Dates apply to the Gemini API and are the earliest possible shutdown dates Google publishes. If you use Gemini through another platform, check that platform’s own schedule.