AnthropicClosed Weights

Claude-Sonnet-4.5

anthropic/claude-sonnet-4.5

Best Input Price

$2.60 / 1M

Balanced Claude model for coding, analysis, agent workflows, and cost control

Context Window

1,000,000 tokens

Reasoning

Supported

Tool Calling

Supported

Released

2025-09-26

Inference Providers (3)

Provider	Model ID	Context	Input / 1M	Output / 1M	Action
Poe	anthropic/claude-sonnet-4.5	983,040	$2.60	$13.00	Docs ↗
ZenMux	anthropic/claude-sonnet-4.5	1,000,000	$3.00	$15.00	Docs ↗
Vercel AI Gateway	anthropic/claude-sonnet-4.5	1,000,000	$3.00	$15.00	Docs ↗