Flux 3 Text to Video

bfl/flux-3/text-to-video

Flux 3 by BFL - generate cinematic videos from text descriptions with AI. Create high-quality video content with natural motion, camera control, and optional audio generation.

Use in agent Get API key

Base price: $0.85USD / run
Execution: async
Model type: video
Input fields: 5

Production route

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Playground

Open playground

Input

Prompt(string)

The text prompt describing the video you want to generate.

Aspect Ratio(string)

Output aspect ratio. Allowed values: 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16.

Resolution(string)

Resolution of the generated video. Allowed values: 720p, 1080p.

Duration(integer)

Video duration in seconds (5-20). Allowed values: 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20.

Generate Audio(boolean)

Whether to generate audio for the video.

OutputReady

Your output will appear here

Complete the inputs, then click Run.

Model card

Specifications

Pricing

Base price: $0.85 / run

Context & modalities

Input: Schema-defined
Output: video

Capabilities

Chat: Not supported
Vision: Not supported
Reasoning: Not supported
Structured output: Not supported
Function calling: Not supported
Audio input: Not supported

Access

Provider: BFL
Model ID: bfl/flux-3/text-to-video
Execution: async
API: Unified Run API
Endpoint: /v1/run

API README

Flux 3 Text to Video

FLUX 3 Text to Video belongs at the full-quality motion concept creation from a script stage of a visual workflow. Rather than treating the model as an isolated demonstration, teams can place it inside briefing, review, selection, and handoff practices where the entire visual premise can be developed before any source photography or illustration exists, making the model useful early in production. This positioning clarifies why the model earns a place in a real creative pipeline and what kind of decision it helps people make.

A practical use of FLUX 3 Text to Video is cinematic pitches, advertising concepts, narrative inserts, and original moving scenes that need a polished candidate from written direction. Begin by agreeing on the creative objective and review criteria, prepare only the source material needed for that objective, and compare results against audience, brand, editorial, and production needs. Technical request choices remain documented below so the prose can stay focused on planning and creative value.

Highlights

World-aware scene synthesis. Builds subjects, environments, motion, and physical interactions from a textual brief.

Multi-shot coherence. Handles camera changes and scene progression while preserving narrative and visual continuity.

Native audiovisual timing. Generates dialogue, sound effects, and ambience in step with the corresponding action.

Multilingual performance. Produces spoken content with natural accents and accurate lip synchronization across languages. FLUX 3 jointly models video and sound, grounding visual action, speech, effects, and ambience in one evolving scene.

Pricing

Option	Price
720p per second	$0.17
1080p per second	$0.29
5 seconds at 720p	$0.85

Billed per requested second of video.

When to Use

✅ Good fit	❌ Consider alternatives
The project needs this exact FLUX capability	The intended task belongs to a different media workflow
Required source and control media are available	Necessary assets or usage rights are unavailable
Creative direction can state change and preservation goals	Output must be deterministic at pixel or frame level
Supported dimensions and formats match final delivery	Placement requires unsupported specifications
An asynchronous generated result fits production	A live frame-synchronous response is mandatory

Prompt Guide

Lead with the main subject and action, then specify composition, context, lighting, materials, style, typography, and atmosphere. For editing, identify each source and clearly separate the requested transformation from the subjects, regions, geometry, or identity that must remain unchanged.

{
  "aspect_ratio": "21:9",
  "duration": 5,
  "prompt": "A cinematic, precisely composed result with a clear subject, controlled camera or viewpoint, realistic lighting, exact materials, and intentional atmosphere",
  "resolution": "720p"
}

Technical Specs

Spec	Value
Model ID	`bfl/flux-3/text-to-video`
Input fields	`prompt` (string)<br>`aspect_ratio` (string; `21:9`, `16:9`, `3:2`, `4:3`, `5:4`, `1:1`, `4:5`, `3:4`, `2:3`, `9:16`)<br>`resolution` (string; `720p`, `1080p`)<br>`duration` (integer; `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15`, `16`, `17`, `18`, `19`, `20`)<br>`generate_audio` (boolean)
Required input	`prompt`
Output fields	`url`, `content_type`
Execution	Asynchronous job

Related Models

bfl/flux-3/text-to-video/draft — Compare this concrete local family route.
bfl/flux-3/draft-enhance — Compare this concrete local family route.
bfl/flux-3/extend-video — Compare this concrete local family route.

Start building

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

Production API

Unified Run API endpoint

https://api.sandbase.ai/v1/run

Model ID

bfl/flux-3/text-to-video

# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/run" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "bfl/flux-3/text-to-video",
  "prompt": "A red panda walks along a mossy log in a sunlit forest, one continuous unbroken shot. Ambient birdsong and rustling leaves.",
  "duration": 5,
  "resolution": "720p",
  "aspect_ratio": "16:9",
  "generate_audio": true
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
  status=$(printf '%s' "$result" | jq -r .status)
  case "$status" in completed|failed|timeout) break ;; esac
  sleep 2
  result=$(curl --fail-with-body --silent \
    -H "Authorization: Bearer $SANDBASE_API_KEY" \
    "https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"

Choose your model

Compare models

All image & video models

Model	Type	Default price	Released
Flux 3 Text to VideoThis model `BFL`	Video	$0.85 / run	Aug 4, 2026
Flux 3 Image to Video `BFL`	Video	$0.85 / run	Aug 4, 2026
Flux 3 First-Last Frame to Video `BFL`	Video	$0.85 / run	Aug 4, 2026
Flux 3 Keyframes to Video `BFL`	Video	$0.85 / run	Aug 4, 2026
Flux 3 Video Extend `BFL`	Video	$2.05 / run	Aug 4, 2026
Flux 3 Text to Video Draft `BFL`	Video	$0.30 / run	Aug 4, 2026

Questions

FAQ

How do I call BFL Flux 3 Text to Video through SandBase?

Create a SandBase API key, then send requests with the model ID "bfl/flux-3/text-to-video" to Unified Run API (/v1/run) at https://api.sandbase.ai. The request examples on this page show the exact payload.

Do I need a separate BFL account?

No. One SandBase API key and balance gives you access to BFL Flux 3 Text to Video and the other models in the catalog; you do not need to sign up with BFL separately.