SpaceXAI, the company formerly known as xAI, has released Grok 4.6, a frontier AI model that scores 61 on the third-party Artificial Analysis Intelligence Index, tying OpenAI's GPT-5.6 Sol Max and surpassing Moonshot's Kimi K32. The model represents a five-point improvement over its predecessor, Grok 4.5 High.
Anthropic's Claude Opus 5 and Fable 5 hold the top two positions on the Artificial Analysis leaderboard, placing Grok 4.6 in a tie for third. The SRC-001 headline initially described the model as fourth-best on the index1; VentureBeat's fuller reporting clarifies the tie with GPT-5.6 Sol Max for third.
Grok 4.6 is built with a focus on long-running agents, coding, and knowledge work3. The model posts gains over Grok 4.5 across coding, terminal, knowledge-work, and agent benchmarks, according to VentureBeat's analysis. SpaceXAI also describes the model as targeting more ambitious interactive and visual work.
Pricing is set at $2 per million input tokens and $6 per million output tokens. VentureBeat characterizes this as mid-priced among leading frontier models, both proprietary and open source. For context, the VentureBeat pricing table lists several cheaper alternatives: Meta's Muse Spark 1.2 Contributor at $0.10/$0.20, Xiaomi's MiMo-V2.5 Flash at $0.10/$0.30, DeepSeek's deepseek-v4-flash at $0.14/$0.28, and OpenAI's GPT-5.6 Luna at $0.20/$1.20 per million input/output tokens. DeepSeek's deepseek-v4-pro sits at $0.435/$0.87.
ANALYSIS The pricing positions Grok 4.6 above the budget tier occupied by flash and lightweight models but below the premium end of the frontier market. Tying GPT-5.6 Sol Max on the Artificial Analysis index while undercutting or matching its price tier gives SpaceXAI a competitive data point for enterprise agent workloads, the segment the company is explicitly targeting.
The five-point jump from Grok 4.5 High to Grok 4.6 on the same index narrows the gap with the Anthropic models occupying the top two slots, though the exact scores for Claude Opus 5 and Fable 5 are not provided in the available evidence.
SpaceXAI is making Grok 4.6 available to try for free, according to the company's own messaging.