elizaos--eliza/plugins/app-model-tester

@elizaos/app-model-tester

A developer tool for elizaOS that lets you run live end-to-end probes against every model type registered in an Eliza agent — text generation, embeddings, speech synthesis, transcription, voice activity detection, image description, and image generation.

What it adds

Once loaded, the plugin mounts:

• A standalone static HTML tester at GET /model-tester — works without any frontend build.
• JSON API endpoints at /api/model-tester/status (model availability) and /api/model-tester/run (run a probe).
• A React overlay app (ModelTesterAppView) registered in the elizaOS app shell, visible in the apps grid under the system category.

Probes

Probe	Description
text-small	Non-streaming TEXT_SMALL generation
text-large	Streaming TEXT_LARGE generation with chunk capture
embedding	Embedding vector dimensions and preview
text-to-speech	Synthesise speech from the prompt, returned as base64 audio
transcription	Transcribe an uploaded audio file (or a TTS loopback if none is provided)
vad	Voice activity detection on PCM samples — pure JS, always available
image-description	Describe an uploaded image in text
image	Generate an image from the prompt

Each probe tries local inference first (via @elizaos/plugin-local-inference if installed), then falls through to configured cloud providers. All attempts and errors are surfaced in the JSON response.

How to enable

Add modelTesterPlugin to the agent's plugin array:

import { modelTesterPlugin } from "@elizaos/app-model-tester/plugin";

const agent = new AgentRuntime({
  plugins: [modelTesterPlugin, /* other plugins */],
});

The plugin is opt-in. There is no default-enable path.

Required configuration

No plugin-specific environment variables are required. Model provider credentials (Anthropic, OpenAI, etc.) are resolved by the elizaOS runtime through the normal model registry. Local inference uses @elizaos/plugin-local-inference and requires at least one eliza-1-* model bundle to be installed.

E2E script

bun run --cwd plugins/app-model-tester test:e2e

Requires a live agent server. Reads MODEL_TESTER_BASE_URL (default http://127.0.0.1:31337). Set MODEL_TESTER_REQUIRE_ALL=1 to fail if the server is unreachable.

Probes that fail with a known-unavailable backend message (no TTS, missing vision model, low credit balance, etc.) are reported as skipped rather than failures unless MODEL_TESTER_REQUIRE_ALL=1. The text-small, text-large, embedding, and vad probes are always required to pass.