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Claude Sonnet 4.5 API price
claude-sonnet-4.5
The cheapest Claude Sonnet 4.5 API is $2.10/M input at Cheaper Inference (discount marketplace) - all 4 providers compared below, per 1M tokens.
MidAnthropic198K context4 sellers
Input
$2.10
per 1M tokens · Cheaper Inference (discount marketplace)
up to $3.00
Output
$10.50
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 $2.10/M.
Cost calculator
| Provider | Input $/M | Output $/M | Cached in | Your cost |
|---|---|---|---|---|
| Cheaper Inference (discount marketplace)30% off | 2.10cheapest | 10.50 | 0.210 | |
| Official - Anthropic | 3.00 | 15.00 | 0.300 | |
| Batch | 1.50 | 7.50 | - | |
| OpenRouter (aggregator)stale | 3.00 | 15.00 | 0.300 | |
| Batchstale | 1.50 | 7.50 | 0.150 | |
| TokenRouter (aggregator) | 3.00 | 15.00 | 0.300 |
1.4× between the cheapest and the dearest of 4 sellers.
Against its tier
- This model$12.60
- Cheapest · Nemotron 3.5 Content Safety$0.40
- Tier median · GLM 5$4.20
- Dearest · GPT 5.5 Cyber$87.50
#28 of 34 mid · cheaper than 18%
Details
- Context window
- 198K198,000 tokens
- Developer
- Anthropic
- Sellers
- 41.4× spread
- Cheapest at
- Cheaper Inference (discount marketplace)
- Cached input
- $0.21where the source publishes one
- Combined
- $12.60in + out per 1M
- Last checked
- 2026-09-17