Anthropic: Claude Sonnet 4.5 (20250929)
helicone / claude-sonnet-4-5-20250929
Input price
$3
per 1M tokens
Output price
$15
per 1M tokens
Context
200K
tokens
Capabilities
✓ Reasoning✓ Tool calls✓ Image input— Open weights
| cache read | $0.3 |
| cache write | $3.75 |
| Context | 200,000 tokens |
| max output | 64,000 tokens |
| Released | 2025-09-29 |
| Data updated | 2025-09-29 |
Prices are official/data-source rates (per 1M tokens), not what relays actually charge — relay prices vary with discounts and group multipliers. See methodology.