AnthropicClosed Weights

Claude-Opus-4.5

anthropic/claude-opus-4.5

Best Input Price

$4.30 / 1M

Flagship Claude model for deep reasoning, coding, and long-horizon agents

Context Window

200,000 tokens

Reasoning

Supported

Tool Calling

Supported

Released

2025-11-21

Inference Providers (2)

Provider	Model ID	Context	Input / 1M	Output / 1M	Action
Poe	anthropic/claude-opus-4.5	196,608	$4.30	$21.00	Docs ↗
ZenMux	anthropic/claude-opus-4.5	200,000	$5.00	$25.00	Docs ↗