Google · Released May 20, 2025Gemini 2.5 Flash Preview 05-20
Preview snapshot of Gemini 2.5 Flash with controllable thinking budgets.
- Capability
- 141.5ECI · #106 of 165
- Input
- $0.146per 1M tokens
- Output
- $1.96per 1M tokens
- Context
- 1.05M66K max output
What it costs
- Input
- $0.146per million tokens
- Output
- $1.96per million tokens
- Blended (3:1)
- $0.60cheaper than 54% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $1.27 |
| Team assistant25M input + 5M output tokens | $13.47 |
| Production app250M input + 50M output tokens | $134.70 |
Median of 2 paid API providers on models.dev.
Independent benchmarks
#106 of 165 scored models
The shaded band is Epoch AI’s confidence range (139.3–142.9); the tick marks the median scored model.
Scores from Epoch AI, run independently of Google.
The details
- Lab
- Released
- May 20, 2025
- Knowledge cutoff
- Jan 2025
- Context window
- 1,048,576 tokens
- Max output
- 65,536 tokens
- Inputs
- Text, Images, PDFs, Audio, Video
- Output
- Text
- Reasoning
- Always on
- Tool calling
- Yes
- Structured output
- No
- Weights
- Proprietary
- Availability
- 2 API providerslisted on models.dev
More from Google
About Gemini 2.5 Flash Preview 05-20
How much does Gemini 2.5 Flash Preview 05-20 cost?
Gemini 2.5 Flash Preview 05-20 costs $0.146 input / $1.96 output per million tokens (median across 2 API providers). At a 3:1 input-to-output mix that is $0.60 per million tokens, cheaper than 54% of the 445 priced models we track.
What is the context window of Gemini 2.5 Flash Preview 05-20?
Gemini 2.5 Flash Preview 05-20 accepts up to 1,048,576 tokens per request and can write up to 65,536 tokens in one response.
How good is Gemini 2.5 Flash Preview 05-20?
Epoch AI gives Gemini 2.5 Flash Preview 05-20 a Capabilities Index score of 141.5 (likely range 139.3–142.9), ranking it #106 of 165 models Epoch has scored. Epoch AI benchmark results: OTIS Mock AIME 2024–2025 70.8%.
Is Gemini 2.5 Flash Preview 05-20 open source?
No. Gemini 2.5 Flash Preview 05-20 is proprietary; you use it through an API or partner platforms.
What inputs does Gemini 2.5 Flash Preview 05-20 support?
Gemini 2.5 Flash Preview 05-20 accepts text, images, PDFs, audio and video and replies in text. It is a reasoning model, supports tool calling.
When was Gemini 2.5 Flash Preview 05-20 released?
Google released Gemini 2.5 Flash Preview 05-20 on May 20, 2025. Its training data runs to Jan 2025.
What are the best alternatives to Gemini 2.5 Flash Preview 05-20?
The closest current models from other labs on capability, price and release date are DeepSeek R1 0528 (DeepSeek, ECI 141.2, $0.512 / $2.19), Kimi K2 Instruct (Moonshot AI, ECI 139.9, $0.57 / $2.30), QwQ 32B (Alibaba (Qwen), ECI 137.5, $0.53 / $0.70) and GPT-5 Mini (OpenAI, ECI 145.4, $0.25 / $2.00).