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Moondream 3.1 is a vision-language model from Moondream and the successor to Moondream 3 Preview, a 9B mixture-of-experts with 2B active parameters for visual question answering, captioning, OCR and visual reasoning.

Precio: Entrada: 72 créditos / 1 M de tokens (≈ $0.36); salida: 600 créditos / 1 M de tokens (≈ $3.00).

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Guía completa de Moondream 3.1

Moondream 3.1 API on ModelFold

Moondream 3.1 is a vision-language model from Moondream and the successor to Moondream 3 Preview, a 9B mixture-of-experts with 2B active parameters for visual question answering, captioning, OCR and visual reasoning. Try Moondream 3.1 in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.

What Is the Moondream 3.1 API

Moondream 3.1 at a glance

Moondream 3.1 is a chat model from Moondream. It accepts text and images as input and returns text, with a context window of up to 32K tokens.

Use it without hosting anything

On ModelFold you call Moondream 3.1 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 Moondream 3.1

Up to 32K 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, Moondream 3.1 accepts images as input, so a single request can combine instructions with visual or other media.

Reasoning mode

Moondream 3.1 can produce reasoning before its final answer; in the Playground you can switch reasoning on or off to compare results.

How to Use Moondream 3.1 on ModelFold

  1. 1

    Step 1: Try it in the Playground

    Open the Playground at the top of this page, type a prompt and see how Moondream 3.1 responds before writing any code.

  2. 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. 3

    Step 3: Send a request

    Call POST https://modelfold.ai/v1/chat/completions with "model": "moondream3-1-9b-a2b" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.

  4. ✓

    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 Moondream 3.1

Screenshot and image understanding

Read screenshots, charts, diagrams and photos alongside text — for UI review, visual QA or turning images into structured data.

High-volume pipelines

Run classification, extraction, rewriting and batch jobs at scale where cost per request matters.

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 Moondream 3.1?⌄

Moondream 3.1 is a vision-language model from Moondream and the successor to Moondream 3 Preview, a 9B mixture-of-experts with 2B active parameters for visual question answering, captioning, OCR and visual reasoning.

Which inputs does Moondream 3.1 support?⌄

Moondream 3.1 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 Moondream 3.1?⌄

Up to 32K tokens, shared between your input and the model’s output.

Does Moondream 3.1 support function calling?⌄

Function calling is not listed for Moondream 3.1; requests that include tools will be rejected. Use plain prompts or JSON output instead.

How is Moondream 3.1 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 Moondream 3.1 through the API?⌄

Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "moondream3-1-9b-a2b", using your ModelFold API key as the Bearer token.

Tarifas
Entrada72 créditos 1M tokens≈ $0.36
Salida600 créditos 1M tokens≈ $3.00

Se cobra por token, con tarifas separadas para entrada y salida. Los tokens de razonamiento cuentan como salida. El entorno de pruebas aplica exactamente el mismo cálculo.

Leer la documentación de la API →AI Agents · Claude Code / Cursor / Trae →
Inicio rápido
POST/v1/chat/completions
curl https://modelfold.ai/v1/chat/completions \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"moondream3-1-9b-a2b","messages":[{"role":"user","content":"Hello"}]}'