AnthropicClaude Sonnet 4.5
Sonnet 4.5: the same $3 / $15 per 1M workhorse pricing as Sonnet 4.6 on a 200K-token context window, for deployments pinned to the earlier snapshot.
Source: Anthropic pricing, Claude models overview
Pricing
Every billing leg from the live catalog, in USD per 1M tokens.
| Billing leg | Rate | Batch |
|---|---|---|
| Input | $3 / M | $1.5 / M |
| Output | $15 / M | $7.5 / M |
| Cache read | $0.3 / M | $0.15 / M |
| Cache write · 5 min | $3.75 / M | $1.88 / M |
| Cache write · 1 hour | $6 / M | $3 / M |
Cost calculator
Billing-grade math over the rate card above, including the thinking tokens most estimates miss.
Hidden reasoning tokens bill as output. 1.0x = thinking off. Medium-effort reasoning typically lands near 3x; heavy reasoning runs 6x to 8x. Set it to match your workload.
Compare providers
The same model, priced across every platform that serves it. Lowest combined in/out rate is flagged.
| Platform | Input / M | Output / M | Cache read / M | Batch | Access |
|---|---|---|---|---|---|
AnthropicLowest | $3 | $15 | $0.3 | ✓ | First-party API |
Cursor | $3 | $15 | $0.3 | — | Direct |
Price history
Has this model gotten cheaper or more expensive?
More from Anthropic
Other models from the same provider.
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SuperPenguin meters every Claude Sonnet 4.5 call your team makes, prices it with this exact rate card, and shows spend by feature, customer, and team.
Rates are generated from SuperPenguin's live pricing catalog.