Home / Anthropic / Claude / Claude Sonnet 4.5
Claude Sonnet 4.5 API price
anthropic/claude-sonnet-4.5
The cheapest Claude Sonnet 4.5 API is $1.95/M input at Cheaper Inference (discount marketplace) - all 4 providers compared below, per 1M tokens.
MidAnthropic1M context4 sellers
Input
$1.95
per 1M tokens · Cheaper Inference (discount marketplace)
up to $3.00
Output
$9.75
per 1M tokens · Cheaper Inference (discount marketplace)
up to $15.00
Where to buy it
Cheapest Claude Sonnet 4.5 API providers compared - 4 sellers, from $1.95/M.
Cost calculator
| Provider | Input $/M | Output $/M | Cached in | Your cost |
|---|---|---|---|---|
| Cheaper Inference (discount marketplace)35% off | 1.95cheapest | 9.75 | 0.195 | |
| Official - Anthropic | 3.00 | 15.00 | 0.300 | |
| Batch | 1.50 | 7.50 | - | |
| OpenRouter (aggregator) | 3.00 | 15.00 | 0.300 | |
| Batch | 1.50 | 7.50 | 0.150 | |
| TokenRouter (aggregator) | 3.00 | 15.00 | 0.300 |
1.5× between the cheapest and the dearest of 4 sellers.
Against its tier
- This model$11.70
- Cheapest · Nemotron 3.5 Content Safety$0.40
- Tier median · Kimi K2.7 Code$4.0212
- Dearest · GPT 5.5 Cyber$87.50
#30 of 36 mid · cheaper than 17%
Details
- Context window
- 1M1,000,000 tokens
- Developer
- Anthropic
- Sellers
- 41.5× spread
- Cheapest at
- Cheaper Inference (discount marketplace)
- Cached input
- $0.195where the source publishes one
- Combined
- $11.70in + out per 1M
- Last checked
- 2026-10-12