gemini-2-5-flash
Gemini 2.5 Flash is Google’s workhorse model for advanced reasoning, coding, mathematics and scientific tasks, with built-in thinking for more accurate, carefully reasoned answers.
Pricing: Input 60 credits / 1M tokens (≈ $0.30), Output 500 credits / 1M tokens (≈ $2.50).
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Gemini 2.5 Flash API on ModelFold
Gemini 2.5 Flash is Google’s workhorse model for advanced reasoning, coding, mathematics and scientific tasks, with built-in thinking for more accurate, carefully reasoned answers. Try Gemini 2.5 Flash in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.
What Is the Gemini 2.5 Flash API
Gemini 2.5 Flash at a glance
Gemini 2.5 Flash is a chat model from Google. It accepts text, images, video, audio and files (such as PDF) as input and returns text, with a context window of up to 1M tokens.
Use it without hosting anything
On ModelFold you call Gemini 2.5 Flash with a single API key — no model weights to download and no inference servers to run. The same key also works for the other chat, image, video and audio models on ModelFold.
Core Capabilities of Gemini 2.5 Flash
Up to 1M tokens of context
Keep long conversations, large documents and sizeable code in a single request, so the model can reason over the full material instead of fragments.
Understands images, video, audio and files (such as PDF)
Besides text, Gemini 2.5 Flash accepts images, video, audio and files (such as PDF) as input, so a single request can combine instructions with visual or other media.
Function calling
Gemini 2.5 Flash supports tool (function) calling: describe your functions in the request and the model returns structured calls your code can run — the basis for agents and integrations.
Reasoning mode
Gemini 2.5 Flash can produce reasoning before its final answer; in the Playground you can switch reasoning on or off to compare results.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
How to Use Gemini 2.5 Flash on ModelFold
- 1
Step 1: Try it in the Playground
Open the Playground at the top of this page, type a prompt and see how Gemini 2.5 Flash responds before writing any code.
- 2
Step 2: Create an API key
Sign in to ModelFold and create an API key in the console. Keep it secret and send it as a Bearer token.
- 3
Step 3: Send a request
Call POST https://modelfold.ai/v1/chat/completions with "model": "gemini-2-5-flash" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.
- ✓
Step 4: Ship and monitor
Integrate the response into your product and check token usage and spend for every call in the console logs.
What You Can Build with Gemini 2.5 Flash
Analysis and complex reasoning
Work through research questions, data interpretation, planning and other problems that need careful step-by-step reasoning.
AI coding assistants
Generate, explain, debug and refactor code, review pull requests and work through multi-file changes in developer tools and IDE plugins.
Audio and video analysis
Summarize recordings, meetings and video clips, extract key points and answer questions about their content.
Long-document workflows
Feed in long reports, contracts, manuals or codebases and ask for summaries, comparisons and answers grounded in the material.
Frequently Asked Questions
What is Gemini 2.5 Flash?⌄
Gemini 2.5 Flash is Google’s workhorse model for advanced reasoning, coding, mathematics and scientific tasks, with built-in thinking for more accurate, carefully reasoned answers.
Which inputs does Gemini 2.5 Flash support?⌄
Gemini 2.5 Flash accepts text, images, video, audio and files (such as PDF) and returns text. Through ModelFold you can send text and images (OpenAI-style image_url content); in the Playground you can also attach documents, which are converted to text.
How long is the context window of Gemini 2.5 Flash?⌄
Up to 1M tokens, shared between your input and the model’s output.
Does Gemini 2.5 Flash support function calling?⌄
Yes. Gemini 2.5 Flash supports tools / function calling through the standard tools parameter of the chat completions API.
How is Gemini 2.5 Flash billed on ModelFold?⌄
Pay as you go by tokens: input and output tokens are charged at the per-million-token prices shown on this page. There is no monthly fee, and failed requests are not charged.
How do I call Gemini 2.5 Flash through the API?⌄
Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "gemini-2-5-flash", using your ModelFold API key as the Bearer token.
| Input | 60 credits 1M tokens≈ $0.30 |
| Output | 500 credits 1M tokens≈ $2.50 |
Billed per token: input and output are priced separately, and thinking tokens count as output. The Playground charges exactly the same way.
Read API docs →AI Agents · Claude Code / Cursor / Trae →curl https://modelfold.ai/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"gemini-2-5-flash","messages":[{"role":"user","content":"Hello"}]}'