Model comparison · updated 2026-07-28

Claude Opus 4.8vsGPT-5.6 Luna

Side-by-side pricing for1 million tokens

Price comparison

Claude Opus 4.8GPT-5.6 LunaVerdict
ProviderAnthropicOpenAI--
Context window1M1.05M--
Input / 1M tokens$5$1GPT-5.6 Luna is 5x cheaper
Output / 1M tokens$25$6GPT-5.6 Luna is 4.2x cheaper
Output:input ratio5x6x--
Tierflagshipbudget--

What does $10 buy?

$10 of input

Claude Opus 4.8

2,000,000 tokens

GPT-5.6 Luna

10,000,000 tokens

GPT-5.6 Luna gives you 5x more input for the same budget.

$10 of output

Claude Opus 4.8

400,000 tokens

GPT-5.6 Luna

1,666,667 tokens

GPT-5.6 Luna gives you 4.2x more output for the same budget.

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