xAI Grok 4.6: next major frontier model lands with Artificial Analysis Intelligence Index 61

2 sources

On 2026-08-12 xAI released Grok 4.6 as the next major frontier model. Artificial Analysis, the third-party benchmark service, reports Grok 4.6 scores 61 on the Intelligence Index. The captured summary did not extract the specific context window, per-tier pricing, or tier-by-tier benchmark breakdown beyond the headline index score. The takeaway for creators: Grok 4.6 is the next closed-weight frontier reference point, but the headline number is the only capability figure on the record without further extraction.

Why now

The story is the editorial frame for 'xAI's next frontier checkpoint' — useful because creators evaluating Grok against other closed-weight frontiers (OpenAI GPT-5.6, Anthropic Mythos, Google Gemini 3.5 Pro) now have a 2026-08-12 anchor.

Why it is worth publishing

Demo potential: a 4-minute explainer on what 'Intelligence Index 61' means for creators picking between closed-weight frontiers, with a short comparison to the OpenAI / Anthropic / Google index numbers once creators re-extract them.

Evidence basis

xAI official news + Artificial Analysis third-party benchmark

“xAI just shipped Grok 4.6 with Artificial Analysis Intelligence Index 61 — and that single number is the only capability figure on the record until you extract the rest.”

Angle

Frame the release as the 'next closed-weight frontier reference point' — use the Artificial Analysis Intelligence Index score as the headline capability figure and flag that specific context / pricing / tier breakdown requires further extraction.

Format

Short talking-head video

Demo idea

A 4-minute explainer: 1 min 'what xAI shipped today', 1 min 'what Artificial Analysis Intelligence Index 61 means', 1 min 'how to compare it to OpenAI / Anthropic / Google closed-weight frontiers once you extract those numbers', 1 min 'what you should not quote without re-extracting'.

Platform notes

Specific context window, per-tier pricing, and capability list beyond the headline index score were not extracted. Open x.ai/news/grok-4-6 directly before stating any specific capability on the record.

Usable claims

xAI released Grok 4.6 on 2026-08-12. Artificial Analysis reports Grok 4.6 scores 61 on the Intelligence Index.

Evidence pipeline

From the news

Breakdown

Grok 4.6 is the next closed-weight frontier reference point — useful to frame as 'next frontier checkpoint' but easy to oversell by quoting the Artificial Analysis Intelligence Index 61 as if it were a comprehensive capability list. The risk: the captured summary only extracted the headline index number, not the context window, per-tier pricing, or tier-by-tier benchmark breakdown. This explainer uses the headline index score as the only capability figure on the record and flags that specific context / pricing / tier breakdown requires further extraction.

Sources

Risks

Refer to Grok 4.6 by the headline index score and describe the release as 'the next major frontier model from xAI'. Open the xAI news post directly to extract specific numbers before stating them.

Demo ideas

Closed-weight frontier index comparison: Grok 4.6 (61) vs OpenAI GPT-5.6 / Anthropic Mythos / Google Gemini 3.5 Pro — directional only, label as 'Artificial Analysis Intelligence Index' for Grok 4.6 and 'same index source' for the others when you re-extract.
Decision card: 'which closed-weight frontier for a Q4 build' — map Grok 4.6 onto the workflow shapes it fits (vision, reasoning, agentic).
Tier-by-tier pricing / context walkthrough once the xAI news post is re-extracted for the full capability list.