---
title: "grok-3-fast-beta - Model Details & Comparison"
description: "grok-3-fast-beta from xAI: 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/xai/grok-3-fast-beta"
markdown: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/xai/grok-3-fast-beta.md"
---

# grok-3-fast-beta - Model Details & Comparison

> grok-3-fast-beta from xAI: 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 grok-3-fast-beta

grok-3-fast-beta is a chat model from xAI, one of 41 chat models they offer. It is priced at $3.00 per 1M input tokens and $15.00 per 1M output tokens, ranking 2270 out of 2669 chat models by cost and cheaper than 15% of models in this category. grok-3-fast-beta supports function calling, web search, prompt caching — one of only 11 chat models with this combination. It accepts up to 131K input tokens.

## Specifications

- **xAI Provider.**
- **Chat Mode.**
- **131,072 Max Input Tokens.**
- **131,072 Max Output Tokens.**
- **131,072 Max Tokens.**
- **$3.00 / 1M tokens Input Price.**
- **$15.00 / 1M tokens Output Price.**

## Capabilities

grok-3-fast-beta supports: Function Calling, Web Search, Prompt Caching, Tool Choice.

## grok-3-fast-beta Pricing Overview

At $3.00 per 1M input tokens and $15.00 per 1M output tokens, grok-3-fast-beta ranks 2270 out of 2669 chat models by input cost. It is more expensive compared to the median of $0.50 for chat models, and is cheaper than 15% of models in this category.

grok-3-fast-beta is one of 41 xAI chat models, one of only 11 chat models combining function calling, prompt caching, web search.

## Models to Compare

Alternatives to grok-3-fast-beta with comparable capabilities.

| Model | Provider | Input $/1M | Output $/1M |
| --- | --- | --- | --- |
| anthropic.claude-sonnet-4-6 | AWS Bedrock | $3.00 | $15.00 |
| global.anthropic.claude-sonnet-4-6 | AWS Bedrock | $3.00 | $15.00 |
| us.anthropic.claude-sonnet-4-6 | AWS Bedrock | $3.30 | $16.50 |
| eu.anthropic.claude-sonnet-4-6 | AWS Bedrock | $3.30 | $16.50 |
| au.anthropic.claude-sonnet-4-6 | AWS Bedrock | $3.30 | $16.50 |

- [Compare anthropic.claude-sonnet-4-6](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/anthropic.claude-sonnet-4-6.md)
- [Compare global.anthropic.claude-sonnet-4-6](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/global.anthropic.claude-sonnet-4-6.md)
- [Compare us.anthropic.claude-sonnet-4-6](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/us.anthropic.claude-sonnet-4-6.md)
- [Compare eu.anthropic.claude-sonnet-4-6](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/eu.anthropic.claude-sonnet-4-6.md)
- [Compare au.anthropic.claude-sonnet-4-6](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/au.anthropic.claude-sonnet-4-6.md)

## Related Resources

- [Calculate grok-3-fast-beta costs](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/xai/model/grok-3-fast-beta.md)
- [All xAI pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/xai.md)

## FAQ

### Is grok-3-fast-beta cheaper than anthropic.claude-sonnet-4-6?

Yes. grok-3-fast-beta costs $3.00 per 1M input tokens compared to anthropic.claude-sonnet-4-6's $3.00 per 1M input tokens, making it 0% more affordable. Both are chat models and share support for vision, function calling, reasoning, web search, prompt caching, structured output.

### How does grok-3-fast-beta pricing compare to the average chat model?

grok-3-fast-beta input pricing is $3.00 per 1M tokens, which is 500% above the median of $0.50 for chat models. It ranks 2270 out of 2669 chat models by input cost, making it cheaper than 15% of models in this category. For output, it costs $15.00 per 1M tokens compared to the median of $1.44.

### What makes grok-3-fast-beta different from other xAI models?

Among xAI's 41 chat models, grok-3-fast-beta ranks 34 by input cost. Its combination of function calling, prompt caching, web search is shared by only 10 other chat models.

### What are the best alternatives to grok-3-fast-beta?

The most comparable chat models to grok-3-fast-beta are: anthropic.claude-sonnet-4-6 from AWS Bedrock ($3.00/1M input tokens); global.anthropic.claude-sonnet-4-6 from AWS Bedrock ($3.00/1M input tokens); us.anthropic.claude-sonnet-4-6 from AWS Bedrock ($3.30/1M input tokens); eu.anthropic.claude-sonnet-4-6 from AWS Bedrock ($3.30/1M 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 grok-3-fast-beta costs?

grok-3-fast-beta 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 $3.00 and generating 1M output tokens costs $15.00.

## Related Resources

- [xAI models](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/provider/xai.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)

---

*This is a markdown version of [https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/xai/grok-3-fast-beta](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/xai/grok-3-fast-beta) for AI/LLM consumption.*