GPT Neox 20B overview
GPT Neox 20B by Eleuther AI
Explore the capabilities of GPT-NeoX-20B API for generating complex, context-aware text across a multitude of domains.
GPT Neox 20B specs
- Developer
- Eleuther AI
- Input
- Text
- Output
- Text
- API
- OpenAI-compatible, base URL
https://api.aimlapi.com/v1
GPT Neox 20B Description
GPT-NeoX-20B, developed by EleutherAI, is a 20-billion parameter Transformer-based language model, mirroring the architectural principles of GPT-3. It is trained on the expansive Pile dataset, ensuring a broad understanding of diverse text types including academic, internet, and prose content. This model serves as a powerful tool for generating text and extracting features useful for a variety of downstream tasks.
Use Cases for the Model
GPT-NeoX-20B is particularly suited for academic research, content generation, and complex data analysis tasks where deep language comprehension is required. It can be used to enhance natural language processing applications, assist in generating educational content, or provide support for language-based data analysis in scientific research.
How does it compare to other models?
While GPT-NeoX-20B shares similarities with models like GPT-3 and GPT-J-6B, it is uniquely open-source, providing the community with the flexibility to adapt and extend it for various purposes. It performs competitively on benchmarks such as LAMBADA and SciQ, showcasing its ability to handle complex language understanding tasks.
Tips for Maximizing Efficiency
To effectively utilize GPT-NeoX-20B, ensure that your application aligns with the model’s capabilities in handling extensive text inputs. Leverage its training on diverse data sources by applying it to tasks that benefit from broad general knowledge and textual comprehension.
Optimize Text Descriptions for Better Results
For the best results, provide GPT-NeoX-20B with detailed and context-rich prompts. This will help the model leverage its vast training data more effectively, resulting in more accurate and relevant text generation.
Different Types of API Calls
GPT-NeoX-20B supports a variety of API calls that can be tailored to specific needs, ranging from simple text generation to complex feature extraction tasks. Understanding the capabilities of these API calls can greatly enhance how the model is integrated and utilized in your projects.
Use cases
- NLP research and AI development
- Chatbots and conversational AI applications
- Content generation and summarization
- Educational assistants and tools
- Knowledge extraction and analysis systems
Capabilities
- Function calling
- Streaming
- Structured outputs
- Reasoning
GPT Neox 20B API pricing
| Usage | Price | Unit |
|---|---|---|
| Input | $0.315 | 1M tokens |
| Output | $0.315 | 1M tokens |
GPT Neox 20B 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.
GPT Neox 20B vs other models: token prices
AI/ML API input and output rates for 5 models, per million tokens.
| Model | Input | Output |
|---|---|---|
 GPT Neox 20B | $0.315 | $0.315 |
 Seed 1.6 Flash | $0.0794 | $0.3174 |
 Ministral 3 8B 2512 | $0.3174 | $0.3174 |
| Voxtral Small 24B 2507 | $0.1058 | $0.3174 |
 gpt-oss-safeguard-20b | $0.0794 | $0.3174 |
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GPT Neox 20B FAQ
How much does GPT Neox 20B cost?
GPT Neox 20B is priced at input $0.315 / 1M, output $0.315 / 1M.
Does GPT Neox 20B support streaming?
Yes, GPT Neox 20B can stream responses as they are generated.
Does GPT Neox 20B support tool calling and structured outputs?
Yes, GPT Neox 20B supports both function calling and structured outputs.
Who created GPT Neox 20B?
GPT Neox 20B was built by Eleuther AI.
Can GPT Neox 20B be accessed via an API?
Yes, it is available through the v1 endpoint provided by Eleuther AI.
Does GPT Neox 20B support reasoning tasks?
Yes, reasoning is listed among its capabilities.