Head to head
Claude Opus 4 vs Claude Sonnet 4
Claude Opus 4 is retired; Claude Sonnet 4 is retired.
For tasks, about a month.
Verdict · stale basis
Claude Sonnet 4 costs $1.96 per solved task against
Claude Opus 4 at $8.33 — ▼ 4.3x cheaper.
Over 200 tasks that is $1.3k a month.
On output token price alone Claude Sonnet 4 looks 5.0x cheaper. The ranking holds, but the margin changes.
Verified pricing, pass rate and cost per solved task for Claude Opus 4 and Claude Sonnet 4| Figure | Claude Opus 4 | Claude Sonnet 4 |
|---|
| Input $/Mtok | $15 | $3 |
|---|
| Output $/Mtok | $75 | $15 |
|---|
| Cached input $/Mtok | $1.5 | $0.3 |
|---|
| Pass rate | 72% | 61% |
|---|
| Cost per solved task | $8.33stale | $1.96stale |
|---|
| Cost per month | $1.7k | $392 |
|---|
Cost per month against tasks per month · drag the marker
Solid measured · dashed modelled · dotted stale. The gap is the verdict.
Source: Aider polyglot benchmark · verified 2026-08-21 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings