On June 15, 2026, AWS announced that xAI's Grok 4.3 is now generally available on Amazon Bedrock, letting AWS developers build applications with the model through Bedrock's secure inference engine.
June 15, 2026 · AWS × xAI
Grok 4.3 Lands on Amazon Bedrock
xAI's reasoning-first model is now generally available through Bedrock's single API — running on a new inference engine called Mantle, with tunable reasoning depth and native AWS ecosystem integration for enterprise teams.
4
Reasoning levels: none · low · medium · high
1 API
Single call across all Bedrock model providers
3
Core features: tool calling · structured output · streaming
Direct API token pricing
Per 1M tokens (xAI direct) — output costs 2× input
On Bedrock, charges fold into AWS pay-as-you-go usage fees — Bedrock-specific pricing not yet disclosed.
Why route through Bedrock
Grok 4.3
→
Mantle engine
→
Guardrails · Knowledge Bases · Agents
→
Enterprise app
Use cases span multi-turn workflows: customer support, web development, case-law research, financial document Q&A, contract review, and credit agreement analysis.
Developer upside
Strong reasoning, tool use and structured output inside the familiar AWS environment — well-suited to building agentic workflows on existing infrastructure.
Still unverified
Benchmarks and large-scale deployments remain limited so soon after launch; latency, real pricing and limitations await testing, with supported regions expanding gradually.
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