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SpaceXAI Launches Grok 4.6, Matching GPT-5.6 Sol Max on a Major Composite Benchmark

August 12, 2026 at 13:21 EDT

Foundation Models
AI Agents
Software Dev & Coding

SpaceXAI has released Grok 4.6, a proprietary reasoning model aimed at coding, knowledge work and long-running agent tasks. Early independent results place Grok 4.6 High level with OpenAI's GPT-5.6 Sol Max on the Artificial Analysis Intelligence Index, challenging claims that either model is an outright overall winner.

August 12, 2026 · SpaceXAI

Grok 4.6 joins the frontier

The new reasoning model matches GPT-5.6 Sol Max at 61 on a major composite benchmark while posting lower API token prices.

Grok 4.6 High index

GPT-5.6 Sol Max index

500K

Grok context tokens

Output-token price comparison

Posted API price per 1 million output tokens

Grok 4.6

$30

GPT-5.6 Sol

Grok's posted output-token rate is one-fifth of Sol's; total task costs are closer because token consumption varies.

Practical appeal

Lower posted prices, native tools and a large context window suit repository-scale coding and extended automation.

Reason for caution

A tied composite score does not establish equal reliability across production workflows or every individual test.

The real contest moves beyond one score

Controlled tasks→Tool accuracy→Total task cost→Production reliability

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