Author's Description
Gemini 2.5 Flash is Google's state-of-the-art workhorse model, specifically designed for advanced reasoning, coding, mathematics, and scientific tasks. It includes built-in "thinking" capabilities, enabling it to provide responses with greater accuracy and nuanced context handling. Additionally, Gemini 2.5 Flash is configurable through the "max tokens for reasoning" parameter, as described in the documentation (https://openrouter.ai/docs/use-cases/reasoning-tokens#max-tokens-for-reasoning).
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, a state-of-the-art workhorse model, demonstrates strong overall performance, particularly excelling in reliability and specific accuracy benchmarks. It performs among the fastest models, ranking in the top tier for speed (66th percentile), and offers moderate pricing (34th percentile). Notably, Gemini 2.5 Flash exhibits exceptional reliability with a 100% success rate across all benchmarks, indicating consistent and usable responses. The model shows remarkable accuracy in General Knowledge and Ethics, achieving perfect scores in both categories, and is highlighted as the most accurate at its price point and speed for these tasks. Its Instruction Following capabilities are also very strong at 75.0% accuracy (87th percentile). While its Hallucinations accuracy is 96.0%, suggesting a good ability to acknowledge uncertainty, its duration for this test is notably high. Performance in Reasoning (80.0% accuracy) and Email Classification (99.0% accuracy) is also robust. Mathematics and Coding benchmarks show solid, though not top-tier, performance at 86.0% and 83.0% accuracy respectively. The configurable "max tokens for reasoning" parameter further enhances its utility for complex tasks.
Model Pricing
Current Pricing
Feature | Price (per 1M tokens) |
---|---|
Prompt | $0.3 |
Completion | $2.5 |
Input Cache Read | $0.075 |
Input Cache Write | $0.383 |
Price History
Available Endpoints
Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
---|---|---|---|---|
Google
|
Google | google/gemini-2.5-flash | 1M | $0.3 / 1M tokens | $2.5 / 1M tokens |
Google AI Studio
|
Google AI Studio | google/gemini-2.5-flash | 1M | $0.3 / 1M tokens | $2.5 / 1M tokens |
Google
|
Google | google/gemini-2.5-flash | 1M | $0.3 / 1M tokens | $2.5 / 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 Lite Preview 06-17 | 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
|
★★★★★ | ★★★ | $$ |
Google: Gemini 1.5 Pro Unavailable | Apr 08, 2024 | ~1T | 2M |
Text input
Image input
Text output
|
★★★★ | ★★★ | $$$$ |