Anthropic: Claude Sonnet 4.5
anthropic/claude-sonnet-4-5-20250929Created Sep 29, 2025|200K context context|Starting at $3/M input tokens|Starting at $15/M output tokens
Claude Sonnet 4.5 is an advanced Anthropic Sonnet model tuned for real-world agents, coding workflows, tool use, and multimodal analysis. It balances frontier-level reasoning with practical latency and cost, making it a strong default for software engineering, automation, and complex business workflows.
Providers for Claude Sonnet 4.5
Routes requests to the best providers that are able to handle your prompt size and parameters.
| Provider | Context Window | Max Output | Input Price | Output Price | Cache Read | Cache Write |
|---|---|---|---|---|---|---|
AWS | 200K | 64K | $3 | $15 | $0.3 | $3.75 |
GCP Vertex | 200K | 64K | $3 | $15 | $0.3 | $3.75 |