Model Library
GoogleReleased September 25, 2025Gemini 2.5 Flash (Sep)
Google · Released September 25, 2025
Intelligence score
24
At a glance
- Intelligence
- 24
- Speed
- —
- Latency
- —
- Input price
- Not published
- Output price
- Not published
- Context window
- 3tokens
- Parameters
- —
Summary
Comparison summary
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) scores 24 (estimated) on the Artificial Analysis Intelligence Index, placing it above average among other reasoning models in a similar price tier (median: 14).
Specifications
Technical specifications
| Model name | Gemini 2.5 Flash (Sep) |
|---|---|
| Provider | |
| Release date | September 25, 2025 |
| Intelligence score | 24 |
| Speed | — |
| Latency (TTFT) | — |
| Input price | Not published |
| Output price | Not published |
| Context window | 3 tokens |
| Parameters | — |
| Reasoning | Yes |
| Input modalities | text, image, audio, video |
| Output modalities | — |
| Open weights | No |
| License | — |
| API availability | — |
| Source | Model Intelligence legacy profile: gemini-2-5-flash-preview-09-2025-reasoning |
FAQ · 14
Frequently asked questions
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) was released on September 25, 2025.
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) was created by Google.
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) scores 24 (estimated) on the Artificial Analysis Intelligence Index, placing it above average among other reasoning models in a similar price tier (median: 14).
Yes, Gemini 2.5 Flash Preview (Sep '25) (Reasoning) is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) supports text, image, speech, and video input.
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) supports text output.
Yes, Gemini 2.5 Flash Preview (Sep '25) (Reasoning) supports image input and can analyze, describe, and answer questions about images.
Yes, Gemini 2.5 Flash Preview (Sep '25) (Reasoning) is multimodal. It can process text, image, speech, and video input and generate text output.
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) has a context window of 1.0M tokens. This determines how much text and conversation history the model can process in a single request.
No, Gemini 2.5 Flash Preview (Sep '25) (Reasoning) is proprietary. The model weights are not publicly available.
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) is a proprietary model and Google has not disclosed the model size or parameter count.
Gemini 2.5 Flash Preview (Sep '25) (Reasoning) achieves a score of 24 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Check the providers page for current API availability.
Visit the providers page to see availability.