Side-by-side · API pricing
Claude Opus 4.5 vs Claude Sonnet 4.5
Claude Opus 4.5 and Claude Sonnet 4.5 pricing data is being verified. ModelPriceLab tracks both daily — sign up for alerts when either changes.
Anthropic · Anthropic · Verified daily.
Model A
Claude Opus 4.5
Anthropic
- Input / 1M
- -
- Output / 1M
- $25.00
- Context window
- —
- Platforms tracked
- 1
Model B
Claude Sonnet 4.5
Anthropic
- Input / 1M
- -
- Output / 1M
- $15.00
- Context window
- —
- Platforms tracked
- 1
Per-platform pricing
Both models tracked across official and reseller platforms. Lowest input price wins on cost-sensitive workloads.
Claude Opus 4.5
- openrouter- / $25.00
Claude Sonnet 4.5
- openrouter- / $15.00
Frequently asked questions
- Which is cheaper, Claude Opus 4.5 or Claude Sonnet 4.5?
- Claude Opus 4.5 and Claude Sonnet 4.5 pricing data is being verified. ModelPriceLab tracks both daily — sign up for alerts when either changes.
- Where does this comparison data come from?
- ModelPriceLab crawls official vendor pricing pages and verified third-party platforms daily. Both Claude Opus 4.5 and Claude Sonnet 4.5 are tracked on the same schedule.
- Can I get notified when either price changes?
- Yes — Pro subscribers receive email alerts when input or output prices change for any tracked model.
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