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Grok 4.6 Launches on Amazon Bedrock with 500K Context and Cross-Region Routing

xAI's flagship reasoning model, Grok 4.6, is now generally available across Amazon Web Services through Amazon Bedrock. Released on August 19, 2026 under the model ID xai.grok-4.6, the deployment gives enterprise AWS customers managed API access to xAI's frontier model alongside existing foundational offerings from Anthropic, Meta, and Mistral. The integration comes one week after xAI initially launched Grok 4.6 on August 12, marking a significantly faster enterprise cloud deployment than its p

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Grok 4.6 Launches on Amazon Bedrock with 500K Context and Cross-Region Routing

xAI's flagship reasoning model, Grok 4.6, is now generally available across Amazon Web Services through Amazon Bedrock. Released on August 19, 2026 under the model ID xai.grok-4.6, the deployment gives enterprise AWS customers managed API access to xAI's frontier model alongside existing foundational offerings from Anthropic, Meta, and Mistral.

The integration comes one week after xAI initially launched Grok 4.6 on August 12, marking a significantly faster enterprise cloud deployment than its predecessor, Grok 4.3, which took several months to reach Bedrock.

Pricing and Context Structure

AWS has structured Grok 4.6 pricing across two regional deployment tiers:

  • Global Cross-Region Inference: $2.00 per million input tokens and $6.00 per million output tokens. Prompt cache reads are billed at $0.50 per million tokens.
  • In-Region and Geo Cross-Region Inference: $2.20 per million input tokens and $6.60 per million output tokens. Prompt cache reads are billed at $0.55 per million tokens.

The model accepts text and image inputs while generating text-only responses. Unlike Grok 4.3, which offered a 1-million-token context window at $1.25/$2.50 per million tokens, Grok 4.6 reduces the active context window to 500,000 tokens while raising token pricing to reflect expanded reasoning compute.

Grok 4.6 Bedrock Architecture

Dual-Endpoint Architecture and Reasoning Controls

Grok 4.6 introduces a split infrastructure design across Amazon Bedrock's serving backends:

  1. Standard bedrock-runtime Endpoint: Connects to AWS Geo and Global cross-region inference profiles, routing traffic dynamically across more than 30 AWS regions to balance load and avoid capacity constraints.
  2. bedrock-mantle Endpoint: Serves requests in-region directly from us-west-2 (Oregon), providing client-side tool calling and integrated abuse detection.

Developers can interact with Grok 4.6 via the AWS Converse API or through the OpenAI SDK pointed to Bedrock's base endpoint. The model incorporates four configurable reasoning effort levels: low, medium, high, and xhigh. The low tier is enabled by default, and developers can retain and pass encrypted reasoning traces across multi-turn API conversations to maintain context without exposing internal chain-of-thought tokens.

Benchmark Profile and Enterprise Distribution

In evaluations published during its August 12 launch, Grok 4.6 scored 61 on the composite Artificial Analysis Intelligence Index, tying GPT-5.6 Sol Max. On agentic coding benchmarks, vendor-reported results showed 65.9% on DeepSWE v1.1, 57.5% on APEX-Agents, and 26.0% on Terminal-Bench v3.0.

Following earlier rollouts in Cursor and GitHub Copilot, general availability on Amazon Bedrock places Grok 4.6 inside standard enterprise procurement, IAM access boundaries, and VPC compliance configurations, removing the operational friction of managing direct API billing with xAI.

Sources

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