nex-n2-5-pro
Nex-N2.5-Pro is an agentic model built to turn goals into working, verified outcomes. Its core strength is agentic coding in a visual feedback loop: exploring codebases and implementing multi-file changes.
Pricing: Input 18 credits / 1M tokens (≈ $0.09), Output 60 credits / 1M tokens (≈ $0.30).
Prices updated
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Nex-N2.5-Pro API on ModelFold
Nex-N2.5-Pro is an agentic model built to turn goals into working, verified outcomes. Its core strength is agentic coding in a visual feedback loop: exploring codebases and implementing multi-file changes. Try Nex-N2.5-Pro in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.
What Is the Nex-N2.5-Pro API
Nex-N2.5-Pro at a glance
Nex-N2.5-Pro is a chat model from Nex AGI. It accepts text and images as input and returns text, with a context window of up to 262K tokens.
Use it without hosting anything
On ModelFold you call Nex-N2.5-Pro 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 Nex-N2.5-Pro
Up to 262K 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
Besides text, Nex-N2.5-Pro accepts images as input, so a single request can combine instructions with visual or other media.
Function calling
Nex-N2.5-Pro 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.
Adjustable reasoning effort
Choose a reasoning effort level (low, medium or high) per request to balance depth of thinking against speed and token usage.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
How to Use Nex-N2.5-Pro 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 Nex-N2.5-Pro responds before writing any code.
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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": "nex-n2-5-pro" 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 Nex-N2.5-Pro
Autonomous agents
Build agents that plan multi-step tasks, call your tools and APIs, and keep working toward a goal across long sessions.
AI coding assistants
Generate, explain, debug and refactor code, review pull requests and work through multi-file changes in developer tools and IDE plugins.
Screenshot and image understanding
Read screenshots, charts, diagrams and photos alongside text — for UI review, visual QA or turning images into structured data.
Tool-calling backends
Route requests, call functions and chain API calls as the worker model inside larger agent systems.
Frequently Asked Questions
What is Nex-N2.5-Pro?⌄
Nex-N2.5-Pro is an agentic model built to turn goals into working, verified outcomes. Its core strength is agentic coding in a visual feedback loop: exploring codebases and implementing multi-file changes.
Which inputs does Nex-N2.5-Pro support?⌄
Nex-N2.5-Pro accepts text and images 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 Nex-N2.5-Pro?⌄
Up to 262K tokens, shared between your input and the model’s output.
Does Nex-N2.5-Pro support function calling?⌄
Yes. Nex-N2.5-Pro supports tools / function calling through the standard tools parameter of the chat completions API.
How is Nex-N2.5-Pro 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 Nex-N2.5-Pro through the API?⌄
Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "nex-n2-5-pro", using your ModelFold API key as the Bearer token.
| Input | 18 credits 1M tokens≈ $0.09 |
| Output | 60 credits 1M tokens≈ $0.30 |
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":"nex-n2-5-pro","messages":[{"role":"user","content":"Hello"}]}'