Grok 4.20 Reasoning is a high-performance model by xAI designed for complex logic and math, scientific and technical analysis, multi-step investigations, and high-stakes tasks where accuracy matters most. It incorporates a 'thinking' mechanism before responding and offers strict prompt adherence alongside agentic tool calling.

Grok 4.3 is a flagship reasoning model from xAI leveraging a four-agent deliberation system where internal sub-agents debate the best response. It features native video input and leverages real-time data streams from the X platform for current-events knowledge. It is optimized for long-document analysis, conversational research, and complex multi-step agentic workflows.

Grok 4.5 is xAI's frontier model built for coding, agentic tasks, and knowledge work. Trained on datasets spanning science, engineering, math, and code (in partnership with Cursor), it features a 1.5 trillion parameter architecture and exceeds comparable models in real-world software engineering tasks.

Grok 4.6 is an incremental flagship upgrade over Grok 4.5, utilizing the same 1.5 trillion parameter foundation but enhanced with superior supervised fine-tuning and reinforcement learning via the Grok Build harness. It brings frontier intelligence to long-running AI agents, complex multi-step tasks, and software development, offering aggressive verification and highly competitive cost-per-task efficiency.

Model	Category	Input	Output	Context	Pricing
XAI: Grok 4.20 836e80dd371f4cbfb37e16f6959fd9ac	text	text, image	text	1M	$1.250 in / $2.500 out
XAI: Grok 4.3 cb6d8adf98954713b13be66d23c74325	text	text, image	text	1M	$1.250 in / $2.500 out
XAI: Grok 4.5 3610f89f5b274bbbb6891a590d3f685d	text	text, image	text	500K	$2.000 in / $6.000 out
XAI: Grok 4.6 377c1539edc94932866bb47c1089d646	text	text, image	text	500K	$2.000 in / $6.000 out

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