No longer supported

This model is legacy (released August 2021) and is no longer actively maintained or recommended by AI21 Labs. Consider using their current flagship model instead.

legacylegacyllm Proprietary

Jurassic-1 Jumbo

by AI21 Labs· Released August 2021· Cutoff 2021

Jurassic-1 Jumbo is a large language model developed by AI21 Labs, featuring 178 billion parameters. It was one of the largest language models at its release, designed for a wide range of natural language tasks including text generation, summarization, and question answering. It has been succeeded by the Jurassic-2 series.

Official Site API Docs

Input cost

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Output cost

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Context window

2048 tokens

Max output

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Modalities

text

Parameters

178B

License

proprietary

Capabilities

Text GenerationSummarizationQuestion AnsweringText CompletionParaphrasing

Best For

General-purpose natural language understanding and generation tasks requiring a large model.

Strengths

Very large parameter count (178B) for its time
Strong performance on a variety of NLP benchmarks
Supports multiple languages

Limitations

Legacy model, no longer actively developed
Smaller context window (2048 tokens) compared to modern models
Higher latency and cost compared to newer models
No support for function calling or structured output

Use Cases

Text generation and completion

Summarization of long documents

Question answering systems

Content creation and editing

Language translation assistance

Chatbots and conversational AI

Educational tools and tutoring

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