Today's price · per 1M tokens
Input
$0.100
per 1M tokens
Output
$0.500
per 1M tokens
Blended
$0.200
blended $/1M — 3:1 weighted input:output
Cached input
$0.010
10% of input — prompt caching
How this price is scoped: OpenAI's rate card prices this model by context length: the tracked figure is the short-context tier, and prompts over 272K input tokens bill at the long-context tier of $0.20 input / $0.02 cached input / $0.25 cache write / $0.75 output per 1M — 2x input and cache rates and 1.5x output, applied to the full request. Short-context cache writes bill at $0.125 per 1M. Regional (data-residency) endpoints carry a 10% uplift, and EU data residency is available only with Standard processing.
Price receipt
We read OpenAI's own pricing page on and found gpt-6-luna listed with a price on the same row — that read is where the number above comes from, recorded as a new model. We keep the page text we read; its content hash is 2a31ece637.
Overview
The cheapest GPT-6 reasoning tier, released 2026-09-22 alongside GPT-6 Sol and priced at half the input rate of GPT-5.6 Luna before it. 1.05M context window, text + image input, text output, served over the Responses and Chat Completions APIs. $0.10/$0.50 per 1M tokens (cached input $0.01).
Capabilities
struck through = not supportedBenchmark performance
accuracy % · higher is better- AA Intelligence Index: 38.1 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- AA-Omniscience Index: 0.7 (−100–100)
- Ranks #73 of 98 benchmarked models by average score
- Ranks #61 of 191 comparably-measured models by percentile score, across 5 independent measurements
- Ranks #7 of 191 comparably-tested models by normalized performance per dollar
- Strongest at ARC-AGI 2 — 59.3%, #13 of 44
Source: ARC Prize verified leaderboard, semi-private eval, max effort, Artificial Analysis, Artificial Analysis (text-only, no tools, max effort) · updated · See full rankings →
Specifications
- Provider
- OpenAI
- Context window
- 1M tokens
- Modality
- text, image
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Status
- Current
- Last updated
- Tags
Availability verified: — listed on OpenAI's own page