Model comparison · updated 2026-10-02

GPT-6 AstravsClaude Fable 5.1

Side-by-side pricing for1 million tokens

Price comparison

	GPT-6 Astra	Claude Fable 5.1	Verdict
Provider	OpenAI	Anthropic	--
Context window	1.05M	1M	--
Input / 1M tokens	$10	$10	Same price
Output / 1M tokens	$50	$50	Same price
Output:input ratio	5x	5x	--
Tier	frontier	frontier	--

What does $10 buy?

$10 of input

GPT-6 Astra

1,000,000 tokens

Claude Fable 5.1

1,000,000 tokens

$10 of output

GPT-6 Astra

200,000 tokens

Claude Fable 5.1

200,000 tokens