Claude Sonnet 4.5
Balanced flagship for agents and coding — fast, steerable, and reliable.
Try Claude Sonnet 4.5
Prototype a request in the browser, then ship it with one base-URL change.
This is a UI preview. Create a free key →
Pricing details
Per-spec rates for Claude Sonnet 4.5 — every tier up to 20% below official.
| Spec | Our price | Official | Save |
|---|---|---|---|
| Input · per 1M tokens | $3.60 | $4.50 | 20% ↓ |
| Cached input · per 1M | $1.20 | $1.50 | 20% ↓ |
| Output · per 1M tokens | $12.00 | $15.00 | 20% ↓ |
Core capabilities
Why teams call Claude Sonnet 4.5 through Apifuse.
OpenAI-compatible
Call Claude Sonnet 4.5 with the exact request and response schema you already use.
Transparent pricing
$12.00/1M per 1M tokens — about 20% below the $15.00/1M official rate.
Multi-provider routing
Low latency with automatic failover across redundant upstreams.
Fast integration
One base-URL change, no SDK rewrite, working in minutes.
Volume discounts
Tiered savings apply automatically as your usage grows.
Human support
Engineers on chat when an integration or invoice needs attention.
Start using Claude Sonnet 4.5 in minutes
Three steps, no migration headaches.
What developers say
Teams shipping with Claude Sonnet 4.5 on Apifuse.
“Switched my base URL and the bill dropped instantly. Same outputs, a fraction of the cost.”
“One key, one invoice across every model we use. Procurement finally stopped complaining.”
“Routing has been rock solid under load — latency is consistently lower than going direct.”
“Dropped it into our toolchain in an afternoon. The OpenAI-compatible schema just works.”
Claude Sonnet 4.5 FAQ
Common questions before you integrate.
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