Side-by-side technical and economic comparison between Anthropic's Claude Sonnet 5 and Anthropic's Claude Opus 5.
| Metric | Claude Sonnet 5 | Claude Opus 5 | Advantage |
|---|---|---|---|
| Provider Organization | Anthropic | Anthropic | — |
| Standard Input / 1M | $3.00 | $15.00 | Claude Sonnet 5 (80% lower) |
| Cached Input / 1M | $0.20 | $0.50 | Claude Sonnet 5 lower |
| Output / 1M | $15.00 | $75.00 | Claude Sonnet 5 lower |
| Context Window | 200k | 200k | Equal |
| Max Generation Tokens | 16.4k | 16.4k | Claude Sonnet 5 |
| Tokenizer Family | Anthropic Claude BPE (~65k vocabulary) | Anthropic Claude BPE (~65k vocabulary) | — |
Opt for Claude Sonnet 5 when your engineering requirements prioritize Anthropic's ecosystem, specific tokenizer efficiencies (Calibrated Claude Tokenizer (±3%)), or when your expected prompt-to-completion ratios favor its $3/M input rate.
Opt for Claude Opus 5 when looking for Anthropic's tooling integration, specific context window depth (200k tokens), or when output generation volume favors its $75/M rate.