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Moondream2

MultimodalAvailable
by CommunityModel ID: moondream2

Moondream2 small vision-language model on Replicate. About 1.9B params, designed to run on edge devices, handles captioning, visual QA and short OCR-style reads at very low cost.

Try itGet API keyCompare
Price
≈ $0.0020/run
Input → output
Text + Image → Text
Developer
Community
Updated
September 23, 2026
01

Playground

Try Moondream2

Input & output

≈ $0.0020/run
Try Moondream2

0 / 8,000

Question about the image

Image URL to analyze

Output
The answer appears here.

This run

about $0.002 · 0.2 credits

$0.0058 (0.58 credits) are reserved at the start; the actual GPU time is billed.

New here?

10 free credits ($0.10) when you sign up with Google

Usable 24 hours after sign-up, up to 5 runs per day and at most 2 credits per run. Other sign-in methods start without credits. Enough for 17 runs of this model.

02

Examples

Real outputs from the public examples of this model on Replicate, with the prompt and settings that produced them. They were not generated live on this page.
  • InputInput

    Prompt

    Describe this image

    Response

    The image features a logo with a smiling blue circle above the word "moondream" written in black text.

  • InputInput

    Prompt

    Describe this image

    Response

    A man with a beard and mustache, wearing a suit and red tie, is smiling at the camera with a blue background featuring a logo.

  • InputInput

    Prompt

    Describe this image

    Response

    An astronaut in a white spacesuit is riding a unicorn with a rainbow mane and tail, soaring through a colorful, dreamlike sky with clouds and rainbows.

03

About Moondream2

TL;DRAs of September 23, 2026

Moondream2 is a model by Community in the Multimodal category. On Railwail, Moondream2 costs ≈ $0.0020 per run.

Moondream2 is a compact (roughly 1.9B parameter) open vision-language model built to run efficiently on edge devices and small GPUs. Despite its size it performs well on image captioning, visual question answering, simple counting and reading short text in images. This Replicate endpoint takes an image and a question and returns a concise text answer, making it a cheap default for high-volume alt-text and tagging pipelines.
04

Pricing

Prices in US dollars. Usage is charged from prepaid credits.
Typical run (≈ 2 s on L40S)$0.0020 per run
GPU time (L40S)$0.00117 per GPU second
  • Billed by the GPU time the run actually takes. When the run starts, 3× the typical price is reserved from your balance and settled afterwards.
  • 1 credit = $0.01

Cost calculator

Price calculator

s

Typical according to the provider: about 1.6 s

Total

$0.20

20 credits

Per run

$0.002 · 0.2 credits

Billed by the actual GPU time; this is an estimate.

05

API

Call Moondream2 with your Railwail API key. Use this model ID in the request:
moondream2API documentationGet an API key

No verified API example

The public API passes a different input format than this model needs. Use the playground above.

06

Specifications

Model ID
moondream2
Developer
Community
Category
Multimodal
Input
Text, Image
Output
Text
Billing
By usage (tokens or GPU time)
Catalog entry updated
September 23, 2026

Input parameters

Inputs and settings from the model's input schema. The example in the API section shows which of them the API accepts.

  • promptrequired

    Question about the image

    Type: Text
    Default: –
    Allowed values: up to 8,000 characters
  • image_url

    Image URL to analyze

    Type: Text
    Default: –
    Allowed values: –

Tags

  • replicate
  • moondream
  • vision-understanding
  • open-source
  • small
  • edge
07

Frequently asked questions

What is Moondream2?

Moondream2 is a model by Community in the Multimodal category.

How much does Moondream2 cost on Railwail?

On Railwail, Moondream2 costs ≈ $0.0020 per run. You are charged for what each request actually uses. Usage is paid from prepaid credits; 1 credit equals $0.01.

Which settings does Moondream2 support?

According to its input schema, Moondream2 knows these parameters: prompt (up to 8,000 characters) and image_url.

How fast is Moondream2?

There are not enough measured runs of Moondream2 on Railwail yet to state a run time. It depends on the input, the settings and the load at the provider.

Is Moondream2 better than BLIP?

That depends on the task. Moondream2 (Community) and BLIP (Salesforce) are both models in the Multimodal category. The comparison page shows their prices and specifications side by side.

Compare Moondream2 and BLIP

Can Moondream2 process images?

Yes. Moondream2 accepts images as input in addition to text.

08

Comparable models

All in this category
  • BLIPSalesforce

    Salesforce BLIP. Vision-language model for image captioning and visual question answering. Given an image it writes a short natural-language caption, or answers a question about the image when one is supplied. A widely used baseline for automatic captioning.

    ≈ $0.00030/run

    85 % cheaper per unit

    Compare Moondream2 vs. BLIP
  • CLIP InterrogatorCommunity

    pharmapsychotic's CLIP Interrogator. Takes an image and produces a Stable-Diffusion-style text prompt by combining BLIP captioning with CLIP to rank likely subjects, artists, mediums and styles. Commonly used to reverse-engineer a prompt from an existing picture.

    ≈ $0.0457/run

    2,185 % more expensive per unit

    Compare Moondream2 vs. CLIP Interrogator
  • Depth Anything v2Community

    Monocular depth-estimation model trained on 595k labeled and 62M unlabeled images. Strong zero-shot generalization in indoor and outdoor scenes.

    ≈ $0.0050/run

    150 % more expensive per unit

    Compare Moondream2 vs. Depth Anything v2

All models through one API

One API key for every model on Railwail. Usage is charged from prepaid credits, 1 credit = $0.01.

Get API keyBrowse all models