Introducing Grok on Amazon Bedrock

This article announces the general availability of Grok 4.3 on Amazon Bedrock, xAI's reasoning-first model designed for enterprise AI applications and agentic workflows.

• Grok 4.3 features configurable reasoning effort levels (none, low, medium, high) to balance accuracy and latency
• Supports tool calling, structured JSON output, and image input for document understanding and visual analysis
• Offers 1 million token context window enabling long documents and extended multi-turn conversations
• Accessible via OpenAI-compatible APIs through Mantle inference engine with regional endpoints
• Provides server-side conversation state management to eliminate need for full message history resending
• Available across Standard, Priority, and Flex service tiers with in-Region inference

Grok 4.3 enables developers to build sophisticated agents and reasoning-intensive applications with strong tool use, instruction following, and token efficiency for high-volume inference.