Claude Opus 5 vs Claude Sonnet 5
Whether the Opus tier earns its price over Sonnet.
Side by side
| Attribute | Claude Opus 5 | Claude Sonnet 5 |
|---|---|---|
| Input, per 1M tokens | $5.00 | $2.00 |
| Output, per 1M tokens | $25.00 | $10.00 |
| Context window | 1,000,000 | 1,000,000 |
| Provider | Anthropic | Anthropic |
| Tokenizer | Anthropic tokenizer | Anthropic tokenizer |
| Long-context tier | none | none |
| Retires | no date announced | no date announced |
Which to choose
- Reading more than you write
- Claude Sonnet 5 $2 against Claude Opus 5 $5 per million input tokens — a material gap of 2.5x.
- 10,000 in, 1,000 out
- $0.0750 on Claude Opus 5, $0.0300 on Claude Sonnet 5. Over 10,000 such calls that is $450.00 in Claude Sonnet 5's favour.
What this page does not tell you. Which model produces better answers. That depends on your task, and this site has no benchmark data — everything above is drawn from published pricing and specifications. Compare quality by running your own prompts through both.