flux-2

---
name: flux-2
description: Generate and remix images with Flux 2 through RunAPI. Use when the user asks an agent to create or transform images with Flux 2. Default to the RunAPI CLI for one-off generation; use SDKs only when the user is integrating RunAPI into an app or backend.
documentation: https://runapi.ai/models/flux-2.md
provider_page: https://runapi.ai/providers/black-forest-labs.md
catalog: https://runapi.ai/models.md
metadata:
  openclaw:
    homepage: https://runapi.ai/models/flux-2
    requires:
      bins:
      - runapi
    install:
    - kind: brew
      formula: runapi-ai/tap/runapi
      bins:
      - runapi
    envVars:
    - name: RUNAPI_API_KEY
      required: false
      description: Optional RunAPI API key; agents should prefer environment auth or saved CLI config. Browser login is interactive fallback only.
---

# Flux 2 on RunAPI

Generate and remix images with Flux 2 through RunAPI. The default path for one-off agent tasks is the `runapi` CLI; SDKs are for application integration.

## Routing decision

- One-off generation or remixing for the user → use the **CLI path** with the `runapi` binary.
- Building an app, backend, worker, library, or production codebase → use the **SDK integration path**.

## CLI path

The `runapi` binary is the runtime dependency. Run `runapi auth status` first. For agents and headless runs, prefer `RUNAPI_API_KEY` or import it into saved config with `printf '%s' "$RUNAPI_API_KEY" | runapi auth import-token --token -`. Use `runapi login` only when the user explicitly wants interactive browser auth.

Inspect the available commands and request fields with CLI help:

```shell
runapi flux-2 --help
runapi flux-2 text-to-image --help
runapi flux-2 remix-image --help
```

Run a one-off task (synchronous — polls until the task completes):

```shell
runapi flux-2 text-to-image --input-file request.json
runapi flux-2 remix-image --input-file remix-request.json
```

Submit asynchronously and poll separately:

```shell
runapi flux-2 text-to-image --async --input-file request.json
runapi wait <task-id> --service flux-2 --action text-to-image
runapi flux-2 remix-image --async --input-file remix-request.json
runapi wait <task-id> --service flux-2 --action remix-image
```

Available commands: `text-to-image`, `remix-image`.

## SDK integration path

When integrating Flux 2 into an app, backend, worker, or library — not for one-off tasks — use a RunAPI SDK package:

- JavaScript / TypeScript: `@runapi.ai/flux-2`
- Ruby: `runapi-flux_2`
- Go: `github.com/runapi-ai/flux-2-sdk/go`

## References

- Model overview, pricing, and rate limits: https://runapi.ai/models/flux-2.md
- Provider comparison: https://runapi.ai/providers/black-forest-labs.md
- Full model catalog: https://runapi.ai/models.md

## Variants

- [Flux 2 Pro text to image](https://runapi.ai/models/flux-2/pro-text-to-image.md)
- [Flux 2 Pro remix image](https://runapi.ai/models/flux-2/pro-remix-image.md)
- [Flux 2 Flex text to image](https://runapi.ai/models/flux-2/flex-text-to-image.md)
- [Flux 2 Flex remix image](https://runapi.ai/models/flux-2/flex-remix-image.md)