Head to head

Claude Opus 5.5 vs GPT-6 Astra

Price, context, inputs and filters. No benchmarks theatre.

Claude Opus 5.5 costs 2.5× less per message.

Both hold the same amount of context.

Fact

Made by

Anthropic

OpenAI

Content tier

Mainstream

Intelligence

Brilliant

Price per message

~12.22 credits≈ 8 messages for $1

~30.55 credits≈ 3 messages for $1

Context window

1M tokens≈ 1,538 pages of text in one go

1.1M tokens≈ 1,615 pages of text in one go

Reads

Text, Images

Writes

Text

Tool use

Yes - search, memory, code and more

Served via

OpenRouter, Unbottled AI

Status

Current

A typical message: 16K tokens in, 1.5K out. Short replies cost less. 1 credit = $0.01.