Anthropic
vs
Open AI

Compare AI models side by side

Responses to your questions will appear side by side in the chat windows below.

Anthropic logo
Claude Fable 5.1
Price: $30/1M tokens

Cost: $0
Anthropic

Claude Fable 5.1

Anthropic

Knowledge cutoff: 2026-06 · Context window: 1,000,000 tokens · Reasoning model

Input Price

$10 / 1M tokens

Output Price

$50 / 1M tokens

Context Window

1,000,000 tokens

Hey! I'm here and ready to chat about whatever you'd like.

Open AI logo
GPT-6 Luna
Price: $0.3/1M tokens

Cost: $0
Open AI

GPT-6 Luna

Open AI

Knowledge cutoff: 2026-05-18 · Context window: 1,050,000 tokens · Reasoning model

Input Price

$0.1 / 1M tokens

Output Price

$0.5 / 1M tokens

Context Window

1,050,000 tokens

Hey! I'm here and ready to chat about whatever you'd like.