GPT-JT Models by Together.ai
Last refreshed 2026-05-19. Next refresh: weekly.
Details
Capabilities
About
GPT-JT is a series of large language models that originate from a fine-tuned version of EleutherAI's GPT-J 6B model. These models utilize a decentralized training algorithm, allowing them to operate efficiently despite using a network with relatively slow interconnect speeds. This novel approach optimizes the use of diverse hardware resources. The training process integrates various open-source methodologies and datasets, including Google Research's UL2 training objective, Chain-of-Thought prompting, and datasets like BigScience's Public Pool of Prompts (P3) and AllenAI's Natural Instructions (NI). As a result, GPT-JT models exhibit strong performance on classification benchmarks and are known to outperform models with significantly larger parameters. Importantly, these models are available as open-source, inviting community participation for further enhancements145.
Decision facts
- Best fit
- safetystructured outputs
- Capability starting point
- GPT-JT Moderation 6B with structured outputs
- Lowest tracked input
- GPT-JT Moderation 6B · $0.2/1M · Together AI
- Closest related family
- Together General
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
Use when the workload needs safety, 6B parameters, and structured outputs.
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| GPT-JT 6B V0 | Use when the workload needs 6B parameters. | 2023-03 | 6B parameters | Current |
| GPT-JT 6B V1 | Use when the workload needs 6B parameters. | 2023-03 | 6B parameters | Current |
| GPT-JT Moderation 6B | Use when the workload needs safety, 6B parameters, and structured outputs. | 2023-03 | safety6B parametersstructured outputs | Current |
Release Timeline
1 release groupSpecifications(3 models)
| Model | Released | Parameters | Structured Outputs |
|---|---|---|---|
| GPT-JT 6B V0 | 2023-03 | 6B | No |
| GPT-JT 6B V1 | 2023-03 | 6B | No |
| GPT-JT Moderation 6B | 2023-03 | 6B | Yes |
Available From(2 providers)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| GPT-JT Moderation 6B | Together AI | $0.2 | $0.2 | Serverless |




