Cosmos Predict 2.5 Text To Video API Documentation

Cosmos Predict 2.5 Text To Video API Documentation

Playground

Cosmos Predict 2.5 Text-to-Video generates video from text prompts using NVIDIA’s 2B Cosmos Post-Trained Model. Ready-to-use REST inference API, best performance, no cold starts, affordable pricing.

Features

Cosmos Predict 2.5 Text-to-Video generates video from text prompts using NVIDIA’s 2B Cosmos Post-Trained Model. Describe a scene in natural language — the model creates smooth, cinematic video clips with realistic motion, lighting, and atmospheric effects.

Why Choose This?

• NVIDIA Cosmos architecture Powered by NVIDIA’s 2B parameter Cosmos Post-Trained Model for high-quality video generation.

• Pure text-to-video Generate videos from text descriptions alone — no reference images required.

• Cinematic quality Produces realistic scenes with natural lighting, motion, and environmental effects.

• Prompt Enhancer Built-in tool to automatically improve your scene descriptions.

• Simple pricing Flat $0.25 per video, no complex calculations.

Parameters

How to Use

1. Write your prompt — describe the scene, characters, motion, and atmosphere in detail.
2. Use Prompt Enhancer (optional) — click to automatically refine your description.
3. Run — submit and download your generated video.

Pricing

Best Use Cases

• Cinematic Scenes — Generate atmospheric street scenes, landscapes, and urban environments.
• Storytelling — Create visual narratives from written descriptions.
• Concept Visualization — Bring creative ideas to life without reference images.
• Social Media Content — Produce engaging short-form videos from text.
• Marketing & Ads — Generate promotional video content quickly.

Pro Tips

• Be specific and descriptive — include details about characters, actions, environment, lighting, and weather.
• Use cinematic language like “autumn leaves falling,” “rainy street,” or “golden hour lighting” for atmospheric results.
• Describe camera movement if desired (e.g., “tracking shot,” “slow pan”).
• Try the Prompt Enhancer to automatically improve your descriptions.
• Include mood and atmosphere details for more evocative results.

Notes

• Prompt is the only required field.
• Ensure your prompts comply with content guidelines.

Related Models

• Cosmos Predict 2.5 Image-to-Video — Generate video from images.
• Cosmos Predict 2.5 Video-to-Video — Transform existing videos with text prompts.
• Wan 2.6 Text-to-Video — Multi-resolution text-to-video with flexible duration.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "prompt": "A cinematic ocean wave at sunrise, highly detailed"
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/cosmos-predict-2.5/text-to-video" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}")

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id
' >&2
  exit 1
fi
RESULT_URL=$(printf '%s' "${TASK}" | jq -r '.urls.get // empty')
if [ -z "${RESULT_URL}" ]; then RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"; fi

# 2. Poll until the prediction finishes.
while true; do
  RESPONSE=$(curl --silent --show-error --fail-with-body \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}")
  RESULT=$(printf '%s' "${RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout) printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    created|processing) sleep 2 ;;
    *) printf 'Unexpected status: %s
' "${STATUS}" >&2; exit 1 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Response Parameters

Result Request Parameters

Result Response Parameters