Head-to-Head Model Showdown

Grok 4.7 vs Claude Opus 5.5

Grok 4.7 vs Claude Opus 5.5 side by side: arena.ai text score, list price per 1M tokens, context window and licence, with sources. Data checked 2026-10-11.

Executive Verdict

On the arena.ai text leaderboard, Grok 4.7 scores 1443 (±7, #90) and Claude Opus 5.5 scores 1507 (±8, #2). Claude Opus 5.5 leads by 64 points, outside the margin of error. Grok 4.7: $2.00 input / $6.00 output per 1M tokens. Claude Opus 5.5: $4.00 / $20.00. Blended at 3 input : 1 output, Grok 4.7 costs 62% less ($3.00 vs $8.00 per 1M tokens). Claude Opus 5.5 accepts 1M tokens; Grok 4.7 accepts 500K tokens. Both are proprietary and available only as hosted APIs.

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