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SOLVENCY

Head to head

Claude Opus 5 vs Claude Fable 5

Claude Opus 5: currentClaude Fable 5: currentheavy tier

Verdict · measured basis

Claude Opus 5 costs 1.5x less per solved task.

On output token price alone, Claude Opus 5 looks 2.0x cheaper (2.0x 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
  • Claude Fable 5$10

Output $/M tokens

lower is better

  • Claude Opus 5$25
  • Claude Fable 5$50

Cost per solved task

measured basis · lower is better

  • Claude Opus 5$12.01
  • Claude Fable 5$17.46
Claude Opus 5Claude Fable 5
Input $/Mtok$5$10
Output $/Mtok$25$50
Cached input $/Mtok$0.5$1
Pass rate68%67%
Pass rate sourceAAAA
Cost basismeasuredmeasured
Cost per solved task$12.01$17.46

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