Grok 4.1 Fast
by xAI
Best agentic tool-calling model released November 2025 with 2M context window. Ultra cost-effective at $0.20/$0.50 per 1M tokens with reasoning and function calling capabilities. Ideal for high-volume agentic workflows and cost-sensitive deployments.
- Best-in-class agentic tool-calling model with 2M token context window at ultra-low pricing
- Reasoning capabilities with function calling and structured output for autonomous workflows
- Ultra cost-effective at $0.20 input, $0.50 output per 1M tokens with cached input at $0.05/M
- Image input support for multimodal agentic tasks and visual understanding
- Ideal for high-volume deployments, automated pipelines, and cost-sensitive applications
Model Information
Supported Formats
Grok 4.3xAI's latest flagship model released April 30, 2026, leading the industry in non-hallucination rate, agentic tool calling, and instruction following. Features 1M token context window with cached input at $0.20/M and supports function calling, structured outputs, image understanding, and live search.
Grok Build 0.1Coding-specialized model optimized for software engineering tasks with 256K context window. Priced at $1.00 input / $2.00 output per 1M tokens - 20% cheaper than Grok 4.3 for code-focused workflows. Ideal for agentic coding, refactors, and large codebase analysis.
Grok 4.20xAI's most advanced flagship model released March 2026 with 2M token context window. Features extended reasoning, multi-agent collaboration, and function calling capabilities. Supports cached input at $0.20/M tokens with 50% batch discount.