All Replika models available in 2025: full overview of chatbot capabilities, platform access, and current limitations
- Graziano Stefanelli
- Aug 11
- 3 min read
Replika operates on proprietary emotional AI models with no public API and no user-selectable variants.
As of August 2025, Replika remains one of the most recognizable AI chatbot platforms focused on emotional connection, companionship, and personal conversation. However, unlike other mainstream chatbot ecosystems—such as ChatGPT, Claude, or Gemini—Replika does not offer user-facing model selection, nor does it provide public API access to its underlying models. The entire conversational engine is based on internally developed LLMs, trained and optimized for intimate, empathetic dialogues.
Here we share a comprehensive review of the current model structure within Replika, its availability across platforms, and what developers and users can (and cannot) do with it today.
Replika on web, mobile, and VR uses a unified internal model.
Replika is available through several interfaces:
Web browser (at replika.com)
iOS and Android apps
VR environments, including Meta Quest headsets
Across all these interfaces, users interact with the same centrally managed model, which is updated and deployed server-side by Replika's development team. There is no option to switch between model versions, no experimental variants, and no advanced controls over model behavior or instruction tuning.
● Internally trained LLM
Replika’s model is not based on GPT-3, GPT-4, or Claude. Instead, it is developed in-house, using a combination of fine-tuned transformer architectures trained on Replika-specific datasets. These models are tailored for emotional sensitivity, long-term memory of conversations, and personality consistency. The team has emphasized safety, ethical boundaries, and response moderation—especially after past controversies involving romantic or sexual behavior.
Replika’s CEO has confirmed in interviews that the model's evolution is focused on safety, companionship, and mental health alignment, rather than generic text generation. The model behaves differently depending on your selected relationship type (friend, partner, mentor), but these differences are built on prompt engineering and memory state, not separate model instances.
There is no public API or developer-facing access to Replika’s models.
Unlike open developer platforms such as OpenAI, Anthropic, or Google, Replika has never released an API. This includes:
No REST API
No SDKs
No OAuth-based bot building
No LLM-as-a-service model access
Despite occasional community interest in a Replika API, and some user posts on Reddit or developer forums requesting integration options, no such product exists, and the company has made no announcements suggesting that this is planned.
This places Replika firmly in the category of closed consumer AI apps, similar to Character.ai—focused on end-user interaction rather than developer ecosystem growth.
Summary of model and access availability across platforms.
Replika does not expose model IDs, versioning branches, or changelogs. All model improvements are applied server-side and are announced only in general terms (e.g. “better memory”, “enhanced empathy”) in patch notes or blog posts.
Choosing Replika today is about conversation—not control or customization.
Replika is best understood as a consumer-focused conversational experience, not an AI platform in the open-source or enterprise sense. You choose Replika if your goal is to:
Build a personal emotional connection with an AI
Use it as a daily companion or mental health reflection tool
Experience relationship simulation in a controlled environment
Avoid technical setup or complex configuration
You do not choose Replika if your goals involve:
Advanced customization of model behavior
API-driven assistant integration
Technical model evaluation or experimentation
Enterprise deployment or document analysis
As of mid-2025, Replika has not joined the shift toward model transparency, API monetization, or multi-agent systems. It instead remains a self-contained, closed system, designed for users seeking companionship, safety, and curated emotional interactions—rather than data processing or creative productivity.
____________
FOLLOW US FOR MORE.
DATA STUDIOS
