Comparison · prices as of 2026-07-04
Claude Opus 4.5 vs Claude Sonnet 4.5
On price alone, Claude Sonnet 4.5 (Anthropic) runs about 40% cheaper than Claude Opus 4.5 for a typical chat workload (2K input + 500 output tokens, 1,000 requests/day). Whether that's the right trade depends on the capability gap — pricing below, verify quality on your own evals.
| Spec | Claude Opus 4.5 | Claude Sonnet 4.5 |
|---|---|---|
| Input / MTok | $5 | $3 |
| Output / MTok | $25 | $15 |
| Context window | 200K | 200K |
| Max output | 64K | 64K |
| Class | frontier | workhorse |
| Reference workload / month | $675.00 | $405.00 |
Sources: Anthropic pricing · Anthropic pricing. Run your own numbers in the cost calculator.