Genesis Docs

Genesis supports Mistral for both text/image model routing (mistral/...) and audio transcription via Voxtral in media understanding. Mistral can also be used for memory embeddings (memorySearch.provider = "mistral").

  • Provider: mistral
  • Auth: MISTRAL_API_KEY
  • API: Mistral Chat Completions (https://api.mistral.ai/v1)

Getting started

Get your API key

Create an API key in the [Mistral Console](https://console.mistral.ai/).

Run onboarding

```bash
genesis onboard --auth-choice mistral-api-key
```

Or pass the key directly:

```bash
genesis onboard --mistral-api-key "$MISTRAL_API_KEY"
```

Set a default model

```json5
{
  env: { MISTRAL_API_KEY: "sk-..." },
  agents: { defaults: { model: { primary: "mistral/mistral-large-latest" } } },
}
```

Verify the model is available

```bash
genesis models list --provider mistral
```

Built-in LLM catalog

Genesis currently ships this bundled Mistral catalog:

Model ref Input Context Max output Notes
mistral/mistral-large-latest text, image 262,144 16,384 Default model
mistral/mistral-medium-2508 text, image 262,144 8,192 Mistral Medium 3.1
mistral/mistral-small-latest text, image 128,000 16,384 Mistral Small 4; adjustable reasoning via API reasoning_effort
mistral/pixtral-large-latest text, image 128,000 32,768 Pixtral
mistral/codestral-latest text 256,000 4,096 Coding
mistral/devstral-medium-latest text 262,144 32,768 Devstral 2
mistral/magistral-small text 128,000 40,000 Reasoning-enabled

Audio transcription (Voxtral)

Use Voxtral for batch audio transcription through the media understanding pipeline.

{
  tools: {
    media: {
      audio: {
        enabled: true,
        models: [{ provider: "mistral", model: "voxtral-mini-latest" }],
      },
    },
  },
}
The media transcription path uses `/v1/audio/transcriptions`. The default audio model for Mistral is `voxtral-mini-latest`.

Voice Call streaming STT

The bundled mistral plugin registers Voxtral Realtime as a Voice Call streaming STT provider.

Setting Config path Default
API key plugins.entries.voice-call.config.streaming.providers.mistral.apiKey Falls back to MISTRAL_API_KEY
Model ...mistral.model voxtral-mini-transcribe-realtime-2602
Encoding ...mistral.encoding pcm_mulaw
Sample rate ...mistral.sampleRate 8000
Target delay ...mistral.targetStreamingDelayMs 800 
{
  plugins: {
    entries: {
      "voice-call": {
        config: {
          streaming: {
            enabled: true,
            provider: "mistral",
            providers: {
              mistral: {
                apiKey: "${MISTRAL_API_KEY}",
                targetStreamingDelayMs: 800,
              },
            },
          },
        },
      },
    },
  },
}
Genesis defaults Mistral realtime STT to `pcm_mulaw` at 8 kHz so Voice Call can forward Twilio media frames directly. Use `encoding: "pcm_s16le"` and a matching `sampleRate` only if your upstream stream is already raw PCM.

Advanced configuration

Adjustable reasoning (mistral-small-latest)

`mistral/mistral-small-latest` maps to Mistral Small 4 and supports [adjustable reasoning](https://docs.mistral.ai/capabilities/reasoning/adjustable) on the Chat Completions API via `reasoning_effort` (`none` minimizes extra thinking in the output; `high` surfaces full thinking traces before the final answer).

Genesis maps the session **thinking** level to Mistral's API:

| Genesis thinking level                          | Mistral `reasoning_effort` |
| ------------------------------------------------ | -------------------------- |
| **off** / **minimal**                            | `none`                     |
| **low** / **medium** / **high** / **xhigh** / **adaptive** / **max** | `high`     |

<div class="callout note">
Other bundled Mistral catalog models do not use this parameter. Keep using `magistral-*` models when you want Mistral's native reasoning-first behavior.
</div>

Memory embeddings

Mistral can serve memory embeddings via `/v1/embeddings` (default model: `mistral-embed`).

```json5
{
  memorySearch: { provider: "mistral" },
}
```

Auth and base URL

- Mistral auth uses `MISTRAL_API_KEY`.
- Provider base URL defaults to `https://api.mistral.ai/v1`.
- Onboarding default model is `mistral/mistral-large-latest`.
- Z.AI uses Bearer auth with your API key.

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