---
title: "j2-ultra - Model Details & Comparison"
description: "j2-ultra from Ai21: capabilities, context limits, pricing, and side-by-side comparisons with alternative models."
url: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/ai21/j2-ultra"
markdown: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/ai21/j2-ultra.md"
---

# j2-ultra - Model Details & Comparison

> j2-ultra from Ai21: capabilities, context limits, pricing, and side-by-side comparisons with alternative models.

## Important Links

- [View MCP Gateway](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/resources/mcp-gateway.md)
- [Features](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/#features)
- [Enterprise](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/enterprise)
- [Pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/pricing.md)
- [Docs](https://docs.getbifrost.ai)
- [GitHub](https://github.com/maximhq/bifrost)
- [Book a Demo](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/book-a-demo)

## About j2-ultra

j2-ultra is a completion model from AI21, one of 3 completion models they offer. It is priced at $15.00 per 1M input tokens and $15.00 per 1M output tokens, ranking 22 out of 22 completion models by cost and cheaper than 0% of models in this category. It accepts up to 8K input tokens.

## Specifications

- **Ai21 Provider.**
- **Completion Mode.**
- **8,192 Max Input Tokens.**
- **8,192 Max Output Tokens.**
- **8,192 Max Tokens.**
- **$15.00 / 1M tokens Input Price.**
- **$15.00 / 1M tokens Output Price.**

## j2-ultra Pricing Overview

At $15.00 per 1M input tokens and $15.00 per 1M output tokens, j2-ultra ranks 22 out of 22 completion models by input cost. It is more expensive compared to the median of $1.50 for completion models, and is cheaper than 0% of models in this category.

## Models to Compare

Alternatives to j2-ultra with comparable capabilities.

| Model | Provider | Input $/1M | Output $/1M |
| --- | --- | --- | --- |
| ft:davinci-002 | Text-completion-openai | $12.00 | $12.00 |
| text-unicorn | Vertex AI | $10.00 | $28.00 |
| text-unicorn@001 | Vertex AI | $10.00 | $28.00 |
| gpt-3.5-turbo-instruct-0914 | Azure Text | $1.50 | $2.00 |
| gpt-35-turbo-instruct | Azure Text | $1.50 | $2.00 |

- [Compare ft:davinci-002](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/text-completion-openai/ft-davinci-002.md)
- [Compare text-unicorn](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/vertex_ai/text-unicorn.md)
- [Compare text-unicorn@001](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/vertex_ai/text-unicorn-001.md)
- [Compare gpt-3.5-turbo-instruct-0914](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure_text/gpt-3.5-turbo-instruct-0914.md)
- [Compare gpt-35-turbo-instruct](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure_text/gpt-35-turbo-instruct.md)

## Related Resources

- [Calculate j2-ultra costs](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/ai21/model/j2-ultra.md)
- [All AI21 pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/ai21.md)

## FAQ

### Is j2-ultra cheaper than ft:davinci-002?

No. j2-ultra costs $15.00 per 1M input tokens while ft:davinci-002 costs $12.00 per 1M input tokens, making ft:davinci-002 20% more affordable for input. However, j2-ultra may offer different capabilities or performance characteristics that justify the price difference.

### How does j2-ultra pricing compare to the average completion model?

j2-ultra input pricing is $15.00 per 1M tokens, which is 900% above the median of $1.50 for completion models. It ranks 22 out of 22 completion models by input cost, making it cheaper than 0% of models in this category. For output, it costs $15.00 per 1M tokens compared to the median of $2.00.

### What makes j2-ultra different from other AI21 models?

Among AI21's 3 completion models, j2-ultra ranks 3 by input cost.

### What are the best alternatives to j2-ultra?

The most comparable completion models to j2-ultra are: ft:davinci-002 from Text-completion-openai ($12.00/1M input tokens); text-unicorn from Vertex AI ($10.00/1M input tokens); text-unicorn@001 from Vertex AI ($10.00/1M input tokens); gpt-3.5-turbo-instruct-0914 from Azure Text ($1.50/1M input tokens). These alternatives were selected based on similar capabilities, pricing, and provider diversity. You can compare any of these models in detail using the Bifrost Model Library.

### How do I calculate j2-ultra costs?

j2-ultra is priced based on input and output tokens. Use the interactive calculator at the top of this page to estimate costs for your specific workload. Enter your expected input and output tokens volume and the calculator will show the total cost breakdown. For reference, processing 1M input tokens costs $15.00 and generating 1M output tokens costs $15.00.

## Related Resources

- [Ai21 models](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/provider/ai21.md)
- [Model library](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library.md)
- [LLM cost calculator](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator.md)
- [Docs: Bifrost docs](https://docs.getbifrost.ai)
- [GitHub: maximhq/bifrost](https://github.com/maximhq/bifrost)
- [Pricing: Bifrost pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/pricing.md)
- [Enterprise: Bifrost enterprise](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/enterprise)
- [Book a Demo: Bifrost demo](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/book-a-demo)
- [Resources: Bifrost resources](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/resources.md)

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*This is a markdown version of [https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/ai21/j2-ultra](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/ai21/j2-ultra) for AI/LLM consumption.*