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 Sonnet 4.6
Price: $9/1M tokens

Cost: $0
Anthropic

Claude Sonnet 4.6

Anthropic

Knowledge cutoff: 2025-08-31 · Context window: 1,000,000 tokens · Reasoning model

Input Price

$3 / 1M tokens

Output Price

$15 / 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-5.3 Codex Spark
Price: $7.88/1M tokens

Cost: $0
Open AI

GPT-5.3 Codex Spark

Open AI

Knowledge cutoff: 2025-08-31 · Context window: 128,000 tokens · Reasoning model

Input Price

$1.75 / 1M tokens

Output Price

$14 / 1M tokens

Context Window

128,000 tokens

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