---
title: "grok-4.20-reasoning - Model Details & Comparison"
description: "grok-4.20-reasoning from xAI: capabilities, context limits, pricing, and side-by-side comparisons with alternative models."
url: "https://www.getmaxim.ai/bifrost/model-library/compare/xai/grok-4.20-reasoning"
markdown: "https://www.getmaxim.ai/bifrost/model-library/compare/xai/grok-4.20-reasoning.md"
---

# grok-4.20-reasoning - Model Details & Comparison

> grok-4.20-reasoning from xAI: capabilities, context limits, pricing, and side-by-side comparisons with alternative models.

## Important Links

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

## About grok-4.20-reasoning

grok-4.20-reasoning is a chat model from xAI, one of 40 chat models they offer. It is priced at $2.00 per 1M input tokens and $6.00 per 1M output tokens, ranking 2934 out of 3648 chat models by cost and cheaper than 19% of models in this category. grok-4.20-reasoning supports vision, function calling, reasoning, web search, prompt caching, structured output. Its 1,000K-token context window is in the top 22% among chat models.

## Specifications

- **xAI Provider.**
- **Chat Mode.**
- **1,000,000 Max Input Tokens.**
- **1,000,000 Max Output Tokens.**
- **1,000,000 Max Tokens.**
- **$2.00 / 1M tokens Input Price.**
- **$6.00 / 1M tokens Output Price.**

## Capabilities

grok-4.20-reasoning supports: Function Calling, Vision, Reasoning, Web Search, Prompt Caching, Response Schema, Tool Choice.

## grok-4.20-reasoning Pricing Overview

At $2.00 per 1M input tokens and $6.00 per 1M output tokens, grok-4.20-reasoning ranks 2934 out of 3648 chat models by input cost. It is more expensive compared to the median of $0.57 for chat models, and is cheaper than 19% of models in this category.

grok-4.20-reasoning is one of 40 xAI chat models, with support for vision, function calling, reasoning, web search, prompt caching, structured output. its 1,000K-token context window places it in the top 22% of chat models.

## Models to Compare

Alternatives to grok-4.20-reasoning with comparable capabilities.

| Model | Provider | Input $/1M | Output $/1M |
| --- | --- | --- | --- |
| gpt-5.6-terra | Azure | $2.00 | $12.00 |
| gpt-5.6-terra-2026-07-09 | Azure | $2.00 | $12.00 |
| grok-4.6 | Azure | $2.00 | $6.00 |
| grok-4-20-reasoning | Azure | $2.00 | $6.00 |
| claude-sonnet-5 | Anthropic | $2.00 | $10.00 |

- [Compare gpt-5.6-terra](https://www.getmaxim.ai/bifrost/model-library/compare/azure/gpt-5.6-terra.md)
- [Compare gpt-5.6-terra-2026-07-09](https://www.getmaxim.ai/bifrost/model-library/compare/azure/gpt-5.6-terra-2026-07-09.md)
- [Compare grok-4.6](https://www.getmaxim.ai/bifrost/model-library/compare/azure/grok-4.6.md)
- [Compare grok-4-20-reasoning](https://www.getmaxim.ai/bifrost/model-library/compare/azure/grok-4-20-reasoning.md)
- [Compare claude-sonnet-5](https://www.getmaxim.ai/bifrost/model-library/compare/anthropic/claude-sonnet-5.md)

## Related Resources

- [Calculate grok-4.20-reasoning costs](https://www.getmaxim.ai/bifrost/llm-cost-calculator/provider/xai/model/grok-4.20-reasoning.md)
- [All xAI pricing](https://www.getmaxim.ai/bifrost/llm-cost-calculator/provider/xai.md)

## FAQ

### Is grok-4.20-reasoning cheaper than gpt-5.6-terra?

No. grok-4.20-reasoning costs $2.00 per 1M input tokens while gpt-5.6-terra costs $2.00 per 1M input tokens, making gpt-5.6-terra 0% more affordable for input. However, grok-4.20-reasoning may offer different capabilities or performance characteristics that justify the price difference.

### How does grok-4.20-reasoning pricing compare to the average chat model?

grok-4.20-reasoning input pricing is $2.00 per 1M tokens, which is 253% above the median of $0.57 for chat models. It ranks 2934 out of 3648 chat models by input cost, making it cheaper than 19% of models in this category. For output, it costs $6.00 per 1M tokens compared to the median of $1.65.

### What makes grok-4.20-reasoning different from other xAI models?

Among xAI's 40 chat models, grok-4.20-reasoning ranks 29 by input cost.

### What are the best alternatives to grok-4.20-reasoning?

The most comparable chat models to grok-4.20-reasoning are: gpt-5.6-terra from Azure ($2.00/1M input tokens); gpt-5.6-terra-2026-07-09 from Azure ($2.00/1M input tokens); grok-4.6 from Azure ($2.00/1M input tokens); grok-4-20-reasoning from Azure ($2.00/1M 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 large is grok-4.20-reasoning's context window?

grok-4.20-reasoning supports up to 1,000,000 input tokens, placing it in the top 22% of chat models by context window size (rank 669 of 3577). This makes it suitable for processing long documents, extensive code repositories, or maintaining detailed conversation histories.

### How do I calculate grok-4.20-reasoning costs?

grok-4.20-reasoning 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 $2.00 and generating 1M output tokens costs $6.00.

## Related Resources

- [xAI models](https://www.getmaxim.ai/bifrost/model-library/provider/xai.md)
- [Model library](https://www.getmaxim.ai/bifrost/model-library.md)
- [LLM cost calculator](https://www.getmaxim.ai/bifrost/llm-cost-calculator.md)
- [Docs: Bifrost docs](https://docs.getbifrost.ai)
- [GitHub: maximhq/bifrost](https://github.com/maximhq/bifrost)
- [Pricing: Bifrost pricing](https://www.getmaxim.ai/pricing)
- [Enterprise: Bifrost enterprise](https://www.getmaxim.ai/enterprise)
- [Book a Demo: Bifrost demo](https://www.getmaxim.ai/book-a-demo)
- [Resources: Bifrost resources](https://www.getmaxim.ai/bifrost/resources.md)

---

*This is a markdown version of [https://www.getmaxim.ai/bifrost/model-library/compare/xai/grok-4.20-reasoning](https://www.getmaxim.ai/bifrost/model-library/compare/xai/grok-4.20-reasoning) for AI/LLM consumption.*