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The full platform model catalog for the AI & Models guide. Every Digital Twin has access to the same providers and models listed here; which model is selected for each Model Use is configured per instance under Personalization.

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Platform Models

Praxis AI middleware offers access to a broad catalog of state-of-the-art AI models. You can select the model that best fits your needs based on performance, cost, and capabilities. The default model is configured to use the latest, most capable model available on the platform. In most cases, you should keep default selected unless you have a specific requirement (for example, strict cost control, specific provider, or latency constraints). Models can be accessed using:

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Provider-Based Models

Praxis AI exposes conversation and related capabilities (vision, audio, embeddings, moderation, realtime) through multiple provider types:
  • Amazon Bedrock
  • OpenAI-Compatible Clients (OpenAI, Cohere)
  • Anthropic Direct API
  • Google Gemini Native SDK
  • Mistral AI Native SDK
  • xAI Native API
  • Stability AI Native API
Each provider contains groups and individual models with specific capabilities and uses.
Anthropic models via Bedrock are platform models of choice, mainly for Conversation and Image Analysis. Models marked with Extended support the optional 1M token context window (see Inference Settings).
Claude Fable 5 on Bedrock — data-sharing opt-in required. Anthropic requires 30-day data retention for Fable/Mythos-class traffic on Bedrock. Your AWS account must set its Bedrock data-retention mode to provider_data_sharing (via the Bedrock Data Retention API — no console UI at launch) before global.anthropic.claude-fable-5 can be invoked; otherwise requests fail with “data retention mode ‘default’ is not available for this model.” If that data-sharing posture isn’t acceptable for your deployment, use claude-fable-5 on the Anthropic Direct API instead, which does not require the Bedrock opt-in.
Deprecated models will be removed in a future release. Migrate to a newer model. When a deprecated model is removed, any assistant or configuration referencing it will automatically fall back to the institution’s default model.
Stability AI models are no longer available through Bedrock. They are now served via the Stability AI Native API — see the dedicated accordion below.
These models are configured against the OpenAI API and used across Conversation, Image Analysis, Summary, Audio, TTS, Moderation, and Realtime.

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Conversation / Vision / Summary

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Image Generation

When asked, Pria can produce these images in shapes beyond the default square — the gpt-image models support square (1024×1024), landscape (1536×1024) and portrait (1024×1536); dall-e-3 supports square (1024×1024), landscape (1792×1024) and portrait (1024×1792). If a requested size isn’t supported by the chosen model, Pria automatically uses the closest available size.

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Video Generation

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Embeddings

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Audio Transcription and Translation

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Text-to-Speech (TTS)

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Moderation

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Real-Time Speech-to-Speech (RT / STS)

OpenAI Voices: Cedar (New), Marin (New), Alloy, Ash, Ballad, Coral, Echo, Sage, Shimmer, Verse
More information: https://platform.openai.com/docs/models
Mistral AI models are accessed through the native Mistral SDK (@mistralai/mistralai) and are used for Conversation, Image Analysis, Summary, Audio, TTS, Embeddings, and Moderation. Requires an API key.

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Conversation / Vision / Summary

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Deprecated Conversation Models

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Audio Transcription (STT)

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Text-to-Speech (TTS)

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Embeddings

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Moderation

More information: https://docs.mistral.ai/getting-started/models/models_overview
xAI models are accessed through xAI’s native API and are used for Conversation, Image Analysis, Summary, Code, Image Generation, Embeddings, TTS, and Real-Time Voice. Requires an API key.

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Conversation / Vision / Summary

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Image Generation

These models are shaped by aspect ratio rather than exact pixel size — Pria can request a square, landscape, or portrait shape (e.g. 1:1, 16:9, 9:16, 3:2) and defaults to a square. An unsupported shape is mapped to the closest available aspect.

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Embeddings

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Text-to-Speech (TTS)

xAI Voices: Eve, Ara, Rex, Sal, Leo

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Real-Time Speech-to-Speech (xAI Voice Agent)

xAI RT Voices: Eve (Default), Ara, Rex, Sal, Leo
Audio transcription (STT) for xAI delegates to the configured OpenAI transcription model (e.g., gpt-4o-mini-transcribe).
More information: https://docs.x.ai/docs/models
Stability AI models are accessed through Stability’s v2beta REST API and are dedicated to media generation: Image, Audio, and Video. Requires an API key (STABILITY_API_KEY).

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Image Generation

These models are shaped by aspect ratio rather than exact pixel size — Pria can request shapes such as 1:1, 16:9, 9:16, 21:9, 3:2, or 4:5 and defaults to a square. An unsupported shape is mapped to the closest available aspect.

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Audio Generation

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Video Generation

Stability AI retired its video generation API on 2025-07-24. The model is kept in the dropdown for backward compatibility but calls return a deprecation message. Select Amazon Nova Reel (Bedrock, default) or Sora 2 (OpenAI) for video generation.
Stability AI remains a dedicated media-generation provider for Image and Audio — it does not expose Conversation, Embeddings, STT, or RT Voice. Conversation models from OpenAI, Anthropic, Gemini, Mistral, xAI, or Bedrock can invoke generate_image and generate_audio tools that route to Stability, and generate_video routes to Nova Reel or Sora 2 depending on videoGenerationModel.
More information: https://platform.stability.ai/docs/api-reference
  • AI & Models — model uses, selection, reasoning effort, moderation, and BYOM
  • Personalization — where each Digital Twin selects its per-capability models