Grok 4.6 Benchmarked by Artificial Analysis: Frontier Intelligence with Lower Costs

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Artificial Analysis has benchmarked SpaceXAI's Grok 4.6. Scoring 61 on the Intelligence Index, it matches GPT-5.6 Sol and sits just behind Claude Opus 5 and Claude Fable 5, showing particular strength in agentic tasks and token efficiency.

Key points

  1. Scores 61 points on the Intelligence Index (+5 over Grok 4.5), matching GPT-5.6 Sol (max) and trailing only Claude Opus 5 (63) and Claude Fable 5 (62).
  2. Competitive agentic benchmarks: 1753 Elo on GDPval-AA v2, 50.7% on 𝜏³-Banking, and 88.4% on Terminal-Bench v2.1.
  3. Maintains headline pricing of $2/$6 per 1M input/output tokens (cache hits increased to $0.5 from $0.3), well below Claude Opus 5 ($5/$25) and GPT-5.6 Sol ($5/$30).
  4. Demonstrates high turn efficiency: On AA-Briefcase (1577 Elo), it completes tasks in ~53 turns and ~0.5B input tokens on average, compared to ~103 turns and ~2.0B tokens for Claude Opus 5 (max).
  5. Context window remains unchanged at 500k tokens.

Why it matters

For developers and organisations running complex multi-turn workflows and agentic tasks, output pricing and turn efficiency strongly influence operating costs. Grok 4.6 provides frontier-grade performance at substantially lower token costs than competing models from OpenAI and Anthropic.

Analysis

Artificial Analysis emphasises that Grok 4.6 achieves its cost edge not merely through per-token rates, but through turn efficiency during long-horizon tasks. Reaching comparable answers in roughly half the turns and a quarter of the input tokens compared to Claude Opus 5 compounds cost savings as context builds up, putting Grok 4.6 on the cost-versus-intelligence Pareto frontier.

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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