Open-Assistant Pythia SFT-4 (12B) overview
Open-Assistant Pythia SFT-4 (12B) by OpenAssistant
Open-Assistant Pythia SFT-4 (12B) API is a large language model fine-tuned on human-generated conversations for creating AI assistants.
Open-Assistant Pythia SFT-4 (12B) specs
- Developer
- OpenAssistant
- Input
- Text
- Output
- Text
- API
- OpenAI-compatible, base URL
https://api.aimlapi.com/v1
Basic Information
- Model Name: Open-Assistant Pythia SFT-4 (12B)
- Developer/Creator: Open-Assistant Contributors
- Release Date: March 25, 2023 (or earlier)
- Model Type: Text Generation / Language Model
The Open-Assistant Pythia SFT-4 (12B) is the fourth iteration of the English supervised fine-tuning (SFT) model developed by the Open-Assistant project. It is based on the Pythia 12B architecture and has been fine-tuned on human demonstrations of assistant conversations collected through the open-assistant.io human feedback web app.
Key Features
- Large language model with 12 billion parameters
- Fine-tuned on high-quality human-generated conversations
- Capable of understanding and generating human-like text
- Designed for assistant-like interactions
Intended Use
The model is intended for use in various natural language processing tasks, particularly in creating AI assistants capable of engaging in human-like conversations, answering questions, and performing language-related tasks.Technical DetailsArchitecture
- Base Model: EleutherAI / pythia-12b-deduped
- Architecture: GPTNeoXForCausalLM (Transformer-based)
Training Data
- Source: Human demonstrations of assistant conversations collected through open-assistant.io
- Cut-off Date: Before March 25, 2023
- Data Diversity: Conversations on various topics simulating assistant interactions
Performance Metrics
While specific performance metrics are not provided in the available information, the model is expected to perform well on assistant-like tasks due to its specialized training.
Ethical Guidelines
Users should be aware of potential biases in the model's outputs and use it responsibly, avoiding harmful or discriminatory applications.
Use cases
- Building AI conversational assistants and chatbots
- Research in natural language understanding and dialogue
- Content creation and summarization
- Open-source AI projects and development
Capabilities
- Function calling
- Streaming
- Structured outputs
Open-Assistant Pythia SFT-4 (12B) API pricing
| Usage | Price | Unit |
|---|---|---|
| Input | $0.315 | 1M tokens |
| Output | $0.315 | 1M tokens |
Open-Assistant Pythia SFT-4 (12B) is deprecated on AI/ML API. The rates apply to existing integrations; the models below are current alternatives.
Prices from the AI/ML API price list, checked on Nov 4, 2026.
Open-Assistant Pythia SFT-4 (12B) vs other models: token prices
AI/ML API input and output rates for 5 models, per million tokens.
| Model | Input | Output |
|---|---|---|
| $0.315 | $0.315 | |
| $0.0794 | $0.3174 | |
| $0.3174 | $0.3174 | |
| $0.1058 | $0.3174 | |
| $0.0794 | $0.3174 |
Related articles
Open-Assistant Pythia SFT-4 (12B) FAQ
Does Open-Assistant Pythia SFT-4 (12B) support streaming?
Yes, Open-Assistant Pythia SFT-4 (12B) can stream responses as they are generated.
Does Open-Assistant Pythia SFT-4 (12B) support tool calling and structured outputs?
Yes, Open-Assistant Pythia SFT-4 (12B) supports both function calling and structured outputs.
Who created Open-Assistant Pythia SFT-4 (12B)?
Open-Assistant Pythia SFT-4 (12B) was built by OpenAssistant.
What API endpoint version does Open-Assistant Pythia SFT-4 (12B) use?
It uses the v1 endpoint.

