Ways to buy 7
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 OpenAIflex, cheapest · cached $0.01 | $0.1 | $0.6 | $0.1 / $0.6-50% vs list | $0.01 | -50% vs list |
| OpenAI API The lab's own API · cached $0.02 | $0.2 | $1.2 | $0.2 / $1.2List price | $0.02 | List price |
 Azure AI FoundryDefault region · cached $0.02 | $0.2 | $1.2 | $0.2 / $1.2Same as list | $0.02 | Same as list |
 AWS Bedrockus-east-1 · cached $0.022 | $0.22 | $1.32 | $0.22 / $1.32+10% vs list | $0.022 | +10% vs list |
| Azure AI Foundry eu · cached $0.022 | $0.22 | $1.32 | $0.22 / $1.32+10% vs list | $0.022 | +10% vs list |
| Azure AI Foundry us · cached $0.022 | $0.22 | $1.32 | $0.22 / $1.32+10% vs list | $0.022 | +10% vs list |
| OpenAI fast · cached $0.04 | $0.4 | $2.4 | $0.4 / $2.4+100% vs list | $0.04 | +100% vs list |
USD per 1M tokens; batch $0.1 in, $0.6 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $44.00 direct.
Helicone$44.00+0%
Kong AI Gateway$44.00+0%
LiteLLM$44.00+0%
Vercel AI Gateway$44.00+0%
Cloudflare AI Gateway$46.20+5%
Requesty$46.20+5%
Eden AI$46.42+5.5%
OpenRouter$46.42+5.5%
No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | ||||||
|---|---|---|---|---|---|---|---|
| GPT-6 Luna OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Luna Pro OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Sol OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
| GPT-6 Sol Pro OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
 GLM 5.3Z.ai · 1.31M | $0.561 | $1.76 | $0.561 / $1.76 | $0.862 | 1.31M | on Baidu (fp8) | · |
| GLM 4.6 Z.ai · 205K | $0.43 | $1.75 | $0.43 / $1.75 | $0.76 | 205K | on Venice (fp4) | · |
 DeepSeek V4.1 FlashDeepSeek · 1MCheapest: $0.131 on Morph | $0.15 | $0.6 | $0.15 / $0.6 | $0.262 | 1M | $0.131 on Morph | · |
 Kimi K2.5Moonshot AI · 262K | $0.45 | $2.25 | $0.45 / $2.25 | $0.9 | 262K | on SiliconFlow (int4) | · |
About GPT-5.6 Luna
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series.
Takes files, image, text in and returns text. First listed Jul 17, 2026. Up to 128K output tokens. Blended price $0.45 per 1M tokens at 3 input to 1 output. Model id gpt-5-6-luna.
Price history
List price since Jul 17, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
| Seen | Model | Old price | New price | Change |
|---|---|---|---|---|
| Aug 21, 2026 | GPT-5.6 LunaInput $0.1 to $0.2, Output $0.6 to $1.2, Cached input $0.01 to $0.02 | Input $0.1Output $0.6Cached input $0.01 | Input $0.2Output $1.2Cached input $0.02 | +100% |
| Jul 31, 2026 | GPT-5.6 LunaInput $0.5 to $0.1, Output $3 to $0.6, Cached input $0.05 to $0.01 | Input $0.5Output $3Cached input $0.05 | Input $0.1Output $0.6Cached input $0.01 | -80% |
| Jul 28, 2026 | GPT-5.6 LunaInput $1 to $0.5, Output $6 to $3, Cached input $0.1 to $0.05 | Input $1Output $6Cached input $0.1 | Input $0.5Output $3Cached input $0.05 | -50% |
Questions
How much does GPT-5.6 Luna cost?
$0.2 per million input tokens and $1.2 per million output tokens, with cached input at $0.02, or $0.1 and $0.6 through the Batch API.
What is the context window of GPT-5.6 Luna?
1.05M tokens, with up to 128K tokens of output.
Where is GPT-5.6 Luna cheapest?
Of 7 routes tracked, OpenAI is cheapest at $0.1 input and $0.6 output per million tokens.
Has GPT-5.6 Luna's price changed?
Yes. The output price went from $0.6 to $1.2, first seen Aug 21, 2026.
Sources: OpenRouter's public model catalog and each provider's own pricing page, read every morning at 05:00 UTC; gateway fees re-read every Monday. List prices: your contract may differ. Logos via logo.dev; trademarks belong to their owners.