Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
Specifications
| Provider | Anthropic |
|---|---|
| Context window | 1,000,000 tokens (1M) |
| Input price | $3 / 1M tokens |
| Output price | $15 / 1M tokens |
| Input modalities | text, image, file |
| Output modalities | text |
| Model ID | anthropic/claude-sonnet-4.5 |
Pricing is per 1M tokens, indicative pricing via OpenRouter (updated 2026-08-22); a provider's own list price may differ.
Frequently asked questions
How much does Claude Sonnet 4.5 cost?
Indicative pricing (via OpenRouter, updated 2026-08-22) is $3 per 1M input tokens and $15 per 1M output tokens. A provider's own list price may differ. On Vincony, Claude Sonnet 4.5 is available on credit-based pricing alongside 800+ other models.
What is Claude Sonnet 4.5's context window?
Claude Sonnet 4.5 supports a context window of up to 1,000,000 tokens (1M), which is how much text it can consider at once.
Who makes Claude Sonnet 4.5?
Claude Sonnet 4.5 is built by Anthropic. You can access it — and compare it against other providers' models — through Vincony's multi-model platform.
How do I use Claude Sonnet 4.5?
You can use Claude Sonnet 4.5 directly through Anthropic, or via Vincony, which aggregates 800+ models (including Claude Sonnet 4.5) into one interface with side-by-side comparison and credit-based pricing.