GPT-6 Luna is priced at $0.10 per million input tokens and $0.50 per million output tokens, down from GPT-5.6 promotional prices of $0.20 and $1.20.

The story was corrected

• 2026-10-03

  The first key point said GPT-6 Sol was down from $4 and $20. Those were GPT-5.6 Sol's promotional prices, not an earlier GPT-6 Sol price. It now says so.

  Why we corrected it: The key point dropped the condition our checked claim carries: the cut is measured against GPT-5.6 promotional pricing.

  What it said before: GPT-6 Sol costs $2 per million input tokens and $10 per million output tokens, down from $4 and $20.

The fact above is as the story now says it. All corrections

The exact words it rests on

GPT-5.6 Luna → GPT-6 Luna: $0.20 → $0.10 input, $1.20 → $0.50 output. Prices are per 1 million tokens.

What the source said when we opened it, on 28 Sep 2026.

The source

Introducing GPT-6 Sol and Luna
OpenAI · 2026-09-22

Open the sourcearchived copy

Checked

Checked by the notis newsroom on 28 Sep 2026, against the source above.

The number in it

• $0.10 · GPT-6 Luna, price per million input tokens
• $0.50 · GPT-6 Luna, price per million output tokens

In the story

OpenAI cuts GPT-6 Sol and Luna API prices against GPT-5.6 promotional rates 28 Sep 2026