Anthropic: Claude Sonnet 4.5 (20250929) vs Anthropic: Claude Opus 4.5
Anthropic: Claude Sonnet 4.5 (20250929) is cheaper on output tokens. Choose Anthropic: Claude Sonnet 4.5 (20250929) or Anthropic: Claude Opus 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Anthropic: Claude Sonnet 4.5 (20250929) | Anthropic: Claude Opus 4.5 |
|---|---|---|
| Provider | Helicone | Helicone |
| Input / 1M tokens | $3.00 | $5.00 |
| Output / 1M tokens | $15.00 | $25.00 |
| Context window | 200K | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Sep 2025 | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.