Skip to content
SOLVENCY

Head to head

Claude Opus 5 vs Grok 4.5

Claude Opus 5: currentGrok 4.5: currentheavy tier

Verdict · measured basis

Grok 4.5 costs 3.2x less per solved task.

On output token price alone, Grok 4.5 looks 4.2x cheaper (2.5x on input). The ranking holds, but the margin changes.

Source: Artificial Analysis (artificialanalysis.ai) · verified 2026-08-21 · prices from each provider's pricing page

Input $/M tokens

lower is better

  • Claude Opus 5$5
  • Grok 4.5$2

Output $/M tokens

lower is better

  • Claude Opus 5$25
  • Grok 4.5$6

Cost per solved task

measured basis · lower is better

  • Claude Opus 5$12.01
  • Grok 4.5$3.81
Claude Opus 5Grok 4.5
Input $/Mtok$5$2
Output $/Mtok$25$6
Cached input $/Mtok$0.5$0.3
Pass rate68%64%
Pass rate sourceAAAA
Cost basismeasuredmeasured
Cost per solved task$12.01$3.81

verified 2026-08-21 · heavy task tier; measured rows ignore the tier· Methodology· Claude Opus 5· Grok 4.5