--- title: "grok-4-1-fast - Model Details & Comparison" description: "grok-4-1-fast 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-4-1-fast" markdown: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/xai/grok-4-1-fast.md" --- # grok-4-1-fast - Model Details & Comparison > grok-4-1-fast 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-4-1-fast grok-4-1-fast is a chat model from xAI, one of 41 chat models they offer. It is priced at $0.20 per 1M input tokens and $0.50 per 1M output tokens, ranking 833 out of 2669 chat models by cost and cheaper than 69% of models in this category. grok-4-1-fast supports vision, function calling, reasoning, audio input, web search, prompt caching, structured output. Its 2,000K-token context window is in the top 1% among chat models. ## Specifications - **xAI Provider.** - **Chat Mode.** - **2,000,000 Max Input Tokens.** - **2,000,000 Max Output Tokens.** - **2,000,000 Max Tokens.** - **$0.20 / 1M tokens Input Price.** - **$0.50 / 1M tokens Output Price.** ## Capabilities grok-4-1-fast supports: Function Calling, Vision, Reasoning, Web Search, Audio Input, Prompt Caching, Response Schema, Tool Choice. ## grok-4-1-fast Pricing Overview At $0.20 per 1M input tokens and $0.50 per 1M output tokens, grok-4-1-fast ranks 833 out of 2669 chat models by input cost. It is more affordable compared to the median of $0.50 for chat models, and is cheaper than 69% of models in this category. grok-4-1-fast is one of 41 xAI chat models, with support for vision, function calling, reasoning, audio input, web search, prompt caching, structured output. its 2,000K-token context window places it in the top 1% of chat models. ## Models to Compare Alternatives to grok-4-1-fast with comparable capabilities. | Model | Provider | Input $/1M | Output $/1M | | --- | --- | --- | --- | | gemini-3.1-flash-lite-preview | Google Gemini | $0.25 | $1.50 | | gemini-3.1-flash-lite | Google Gemini | $0.25 | $1.50 | | gemini-3.1-flash-lite-preview | OpenRouter | $0.25 | $1.50 | | gemini-3.1-flash-lite | OpenRouter | $0.25 | $1.50 | | gemini-3.1-flash-lite-preview | Vertex AI | $0.25 | $1.50 | - [Compare gemini-3.1-flash-lite-preview](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/gemini/gemini-3.1-flash-lite-preview.md) - [Compare gemini-3.1-flash-lite](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/gemini/gemini-3.1-flash-lite.md) - [Compare gemini-3.1-flash-lite-preview](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openrouter/gemini-3.1-flash-lite-preview.md) - [Compare gemini-3.1-flash-lite](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openrouter/gemini-3.1-flash-lite.md) - [Compare gemini-3.1-flash-lite-preview](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/vertex_ai/gemini-3.1-flash-lite-preview.md) ## Related Resources - [Calculate grok-4-1-fast costs](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/xai/model/grok-4-1-fast.md) - [All xAI pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/xai.md) ## FAQ ### Is grok-4-1-fast cheaper than gemini-3.1-flash-lite-preview? Yes. grok-4-1-fast costs $0.20 per 1M input tokens compared to gemini-3.1-flash-lite-preview's $0.25 per 1M input tokens, making it 25% more affordable. Both are chat models and share support for vision, function calling, reasoning, audio input, web search, prompt caching, structured output. ### How does grok-4-1-fast pricing compare to the average chat model? grok-4-1-fast input pricing is $0.20 per 1M tokens, which is 60% below the median of $0.50 for chat models. It ranks 833 out of 2669 chat models by input cost, making it cheaper than 69% of models in this category. For output, it costs $0.50 per 1M tokens compared to the median of $1.44. ### What makes grok-4-1-fast different from other xAI models? Among xAI's 41 chat models, grok-4-1-fast ranks 3 by input cost. ### What are the best alternatives to grok-4-1-fast? The most comparable chat models to grok-4-1-fast are: gemini-3.1-flash-lite-preview from Google Gemini ($0.25/1M input tokens); gemini-3.1-flash-lite from Google Gemini ($0.25/1M input tokens); gemini-3.1-flash-lite-preview from OpenRouter ($0.25/1M input tokens); gemini-3.1-flash-lite from OpenRouter ($0.25/1M 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-4-1-fast's context window? grok-4-1-fast supports up to 2,000,000 input tokens, placing it in the top 1% of chat models by context window size (rank 14 of 2653). This makes it suitable for processing long documents, extensive code repositories, or maintaining detailed conversation histories. ### How do I calculate grok-4-1-fast costs? grok-4-1-fast 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 $0.20 and generating 1M output tokens costs $0.50. ## 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-4-1-fast](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/xai/grok-4-1-fast) for AI/LLM consumption.*