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SOLVENCY

Head to head

o3 vs Claude Opus 4

o3: legacyClaude Opus 4: retiredheavy tier

Verdict · modelled basis

o3 costs 9.4x less per solved task.

On output token price alone, o3 looks 9.4x cheaper (7.5x on input). The ranking holds, but the margin changes.

Source: Aider polyglot benchmark · verified 2026-08-21 · prices from each provider's pricing page

Input $/M tokens

lower is better

  • o3$2
  • Claude Opus 4$15

Output $/M tokens

lower is better

  • o3$8
  • Claude Opus 4$75

Cost per solved task

modelled basis · lower is better

  • o3$1.99
  • Claude Opus 4$18.75
o3Claude Opus 4
Input $/Mtok$2$15
Output $/Mtok$8$75
Cached input $/Mtok$0.5$1.5
Pass rate81%72%
Pass rate sourceAiderAider
Cost basismodelledmodelled
Cost per solved task$1.99$18.75

verified 2026-08-21 · heavy task tier; measured rows ignore the tier· Methodology· o3· Claude Opus 4