Today's price · per 1M tokens
Input
$0.200
per 1M tokens
Output
$1.20
per 1M tokens
Blended
$0.450
blended $/1M — 3:1 weighted input:output
Cached input
$0.020
10% of input — prompt caching
Price receipt
We read OpenAI's own pricing page on and found gpt-5.6-luna listed with a price on the same row — that read is where the number above comes from. We keep the page text we read; its content hash is 5eccd5f933.
Overview
Low-cost, high-volume GPT-5.6 tier — the efficient option in the Sol/Terra/Luna scheme, for cost-sensitive workloads. 1.05M context, 128K max output, text + image input. $0.20/$1.20 per 1M tokens (cached input $0.02).
Capabilities
struck through = not supportedBenchmark performance
accuracy % · higher is better- AA Intelligence Index: 37.5 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- AA-Omniscience Index: -10.3 (−100–100)
- GDPval-AA v2: 1489.3 ELO (Real-world work tasks, human baseline = 1000)
- LMSYS Chatbot Arena: 1452.5 ELO (Human preference)
- Ranks #1 of 84 benchmarked models by average score
- Ranks #37 of 181 comparably-measured models by percentile score, across 8 independent measurements
- Ranks #12 of 181 comparably-tested models by normalized performance per dollar
- Strongest at HumanEval — 93%, #5 of 49
184.6 tokens/sec output
Source: Vellum LLM Leaderboard · 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