Author's Description
Gemini 2.5 Flash-Lite is a lightweight reasoning model in the Gemini 2.5 family, optimized for ultra-low latency and cost efficiency. It offers improved throughput, faster token generation, and better performance across common benchmarks compared to earlier Flash models. By default, "thinking" (i.e. multi-pass reasoning) is disabled to prioritize speed, but developers can enable it via the [Reasoning API parameter](https://openrouter.ai/docs/use-cases/reasoning-tokens) to selectively trade off cost for intelligence.
Key Specifications
Supported Parameters
This model supports the following parameters:
Features
This model supports the following features:
Performance Summary
Google's Gemini 2.5 Flash Lite Preview 06-17 demonstrates strong performance as a lightweight, cost-efficient reasoning model. It consistently ranks among the fastest models, placing in the 81st percentile across benchmarks, and offers competitive pricing, typically falling within the 66th percentile. Notably, the model exhibits exceptional reliability with a 100% success rate across all evaluated benchmarks, indicating minimal technical failures. In terms of specific performance, Gemini 2.5 Flash Lite excels in Email Classification (99.0% accuracy, 89th percentile) and General Knowledge (98.5% accuracy, 62nd percentile), showcasing its proficiency in structured data processing and broad factual recall. Its ability to handle hallucinations is also strong, with 94.0% accuracy. While its Instruction Following (60.0% accuracy, 64th percentile) and Ethics (99.0% accuracy, 59th percentile) are solid, areas like Mathematics (76.0% accuracy, 37th percentile) and Coding (78.5% accuracy, 40th percentile) present notable weaknesses, suggesting limitations in complex problem-solving within these domains when "thinking" is disabled. The model's core strength lies in its speed and cost-effectiveness for tasks where rapid, reliable responses are paramount, with the option to enable multi-pass reasoning for more complex challenges.
Model Pricing
Current Pricing
Feature | Price (per 1M tokens) |
---|---|
Prompt | $0.1 |
Completion | $0.4 |
Input Cache Read | $0.025 |
Input Cache Write | $0.183 |
Price History
Available Endpoints
Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
---|---|---|---|---|
Google
|
Google | google/gemini-2.5-flash-lite-preview-06-17 | 1M | $0.1 / 1M tokens | $0.4 / 1M tokens |
Google AI Studio
|
Google AI Studio | google/gemini-2.5-flash-lite-preview-06-17 | 1M | $0.1 / 1M tokens | $0.4 / 1M tokens |
Benchmark Results
Benchmark | Category | Reasoning | Strategy | Free | Executions | Accuracy | Cost | Duration |
---|
Other Models by google
|
Released | Params | Context |
|
Speed | Ability | Cost |
---|---|---|---|---|---|---|---|
Google: Gemini 2.5 Flash Preview 09-2025 | Sep 25, 2025 | — | 1M |
Text input
Image input
File input
Text output
|
★★★★ | ★★★★★ | $$$$ |
Google: Gemini 2.5 Flash Lite Preview 09-2025 | Sep 25, 2025 | — | 1M |
Text input
Image input
File input
Audio input
Text output
|
★★★★★ | ★★★★ | $$$ |
Google: Gemini 2.5 Flash Image Preview (Nano Banana) | Aug 26, 2025 | — | 32K |
Text input
Image input
Text output
Image output
|
— | — | $$$$$ |
Google: Gemini 2.5 Flash Lite | Jul 22, 2025 | — | 1M |
Text input
Image input
File input
Audio input
Text output
|
★★★★★ | ★★★ | $$$ |
Google: Gemini 2.5 Flash | Jun 17, 2025 | — | 1M |
Text input
Image input
File input
Audio input
Text output
|
★★★★ | ★★★★ | $$$$$ |
Google: Gemini 2.5 Pro | Jun 17, 2025 | — | 1M |
Text input
Image input
File input
Audio input
Text output
|
★ | ★★★★★ | $$$$$ |
Google: Gemini 2.5 Pro Preview 06-05 | Jun 05, 2025 | — | 1M |
Text input
Image input
File input
Audio input
Text output
|
★ | ★★★★★ | $$$$$ |
Google: Gemma 1 2B Unavailable | May 28, 2025 | 2B | 8K |
Text input
Text output
|
— | — | $$ |
Google: Gemma 3n 4B | May 20, 2025 | 4B | 32K |
Text input
Text output
|
★★★ | ★★★ | $ |
Google: Gemini 2.5 Flash Preview 05-20 Unavailable | May 20, 2025 | — | 1M |
Text input
Image input
File input
Text output
|
★★★★ | ★★★★ | $$$ |
Google: Gemini 2.5 Pro Preview 05-06 | May 06, 2025 | — | 1M |
Text input
Image input
File input
Audio input
Text output
|
★ | ★★★★★ | $$$$$ |
Google: Gemini 2.5 Flash Preview 04-17 Unavailable | Apr 17, 2025 | — | 1M |
Text input
Image input
File input
Text output
|
★★★★★ | ★★★★★ | $$$ |
Google: Gemini 2.5 Pro Experimental Unavailable | Mar 25, 2025 | — | 1M |
Text input
Image input
File input
Text output
|
— | — | $ |
Google: Gemma 3 4B | Mar 13, 2025 | 4B | 131K |
Text input
Image input
Text output
|
★★★ | ★★ | $$ |
Google: Gemma 3 12B | Mar 13, 2025 | 12B | 131K |
Text input
Image input
Text output
|
★★★ | ★★ | $$ |
Google: Gemma 3 27B | Mar 11, 2025 | 27B | 131K |
Text input
Image input
Text output
|
★★★ | ★★★ | $$ |
Google: Gemini 2.0 Flash Lite | Feb 25, 2025 | — | 1M |
Text input
Image input
File input
Audio input
Text output
|
★★★★★ | ★★ | $$ |
Google: Gemini 2.0 Flash | Feb 05, 2025 | — | 1M |
Text input
Image input
File input
Audio input
Text output
|
★★★★★ | ★★★ | $$ |
Google: Gemini 1.5 Flash 8B Unavailable | Oct 02, 2024 | ~500B | 1M |
Text input
Image input
Text output
|
★★★★★ | ★★ | $ |
Google: Gemma 2 27B | Jul 12, 2024 | 27B | 8K |
Text input
Text output
|
★★★★ | ★★ | $$$$ |
Google: Gemma 2 9B | Jun 27, 2024 | 9B | 8K |
Text input
Text output
|
★★★ | ★ | $$ |
Google: Gemini 1.5 Flash Unavailable | May 13, 2024 | ~500B | 1M |
Text input
Image input
Text output
|
★★★★★ | ★★★ | $$ |
Google: Gemini 1.5 Pro Unavailable | Apr 08, 2024 | ~1T | 2M |
Text input
Image input
Text output
|
★★★★ | ★★★ | $$$$ |