Pricing · GPT
GPT-6 Luna pricing: API price, cost per message and plans
What GPT-6 Luna costs, three ways: OpenAI's API price per token, what GPT-6 Luna's replies actually cost in our test runs, and how many GPT-6 Luna messages each llmwise plan includes. Every limit on GPT-6 Luna is on its model page.
API prices checked against OpenRouter's GPT-6 Luna page. Updated .
Short answer
GPT-6 Luna's API price is $0.10 per million input tokens and $0.50 per million output tokens (OpenAI's list price, September 2026). In our 50 test runs a GPT-6 Luna reply cost $0.00012 on average (median $0.000091), from $0.000077 a reply on RAG and answering from documents to $0.00029 on coding. In llmwise you pay per message instead: up to 60 GPT-6 Luna messages a day on Pro ($20), 120 on Max ($50), 200 on Ultra ($100) and 200 on Studio ($200).
GPT-6 Luna API pricing
GPT-6 Luna through its API is billed per token: $0.10 in, $0.50 out per million tokens, as of September 2026.
| Input tokens | $0.10 per million |
|---|---|
| Output tokens | $0.50 per million |
| A typical GPT-6 Luna message (4,000 in, 700 out) | $0.0008 |
| 1,000 typical GPT-6 Luna messages | $0.75 |
| Typical GPT-6 Luna messages for $1 | 1,333 |
| Whose price | OpenAI's list price |
What a GPT-6 Luna reply cost in our test runs
We sent the same 50 test prompts to every model in llmwise on September 27, 2026, through OpenRouter with llmwise's own prompt and settings. Here's what each GPT-6 Luna reply cost, job by job.
| Job | GPT-6 Luna, per reply | Per 1,000 replies | Tokens in / out | Passed |
|---|---|---|---|---|
| Coding | $0.00029 | $0.29 | 486 / 476 | 5 of 5 |
| Writing | $0.000099 | $0.10 | 398 / 119 | 5 of 5 |
| Math | $0.000098 | $0.10 | 395 / 118 | 4 of 5 |
| Summarization | $0.000094 | $0.09 | 497 / 88 | 4 of 5 |
| Data analysis | $0.00018 | $0.18 | 580 / 236 | 5 of 5 |
| Customer support | $0.000086 | $0.09 | 519 / 69 | 4 of 5 |
| Translation | $0.000093 | $0.09 | 435 / 98 | 5 of 5 |
| SQL | $0.000089 | $0.09 | 499 / 78 | 5 of 5 |
| RAG and answering from documents | $0.000077 | $0.08 | 645 / 25 | 5 of 5 |
| Agents and tool use | $0.000081 | $0.08 | 472 / 68 | 5 of 5 |
Across all 50 GPT-6 Luna replies: $0.00012 on average, $0.000091 at the median, $0.000058 for the cheapest and $0.00056 for the dearest. The GPT-6 Luna replies averaged 493 tokens in and 138 out, against the typical message's 4,000 in and 700 out: each test prompt starts a new chat, while a reply deep in a long chat rereads all of it.
GPT-6 Luna on each llmwise plan
In llmwise a GPT-6 Luna message is one of a published count, however long the reply runs, and you see what's left before you send.
Free: GPT-6 Luna is in the one-time trial of 5 messages, no card needed.
Pro, $20 a month: up to 60 GPT-6 Luna messages a day, on top of the monthly allowance the other models share.
Max, $50 a month: up to 120 GPT-6 Luna messages a day, on top of the monthly allowance the other models share.
Ultra, $100 a month: up to 200 GPT-6 Luna messages a day, on top of the monthly allowance the other models share.
Studio, $200 a month: up to 200 GPT-6 Luna messages a day, on top of the monthly allowance the other models share.
A $10 top-up doesn't add GPT-6 Luna messages: it tops up the monthly allowance, and GPT-6 Luna runs on its own daily count.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Pro $7.50, Max $20, Ultra $42, Studio $85. Using every message on your plan at typical sizes stays under it; very large messages and heavy research use it faster. Every limit, explained.
GPT-6 Luna against the other GPT models
Every GPT model in llmwise beside GPT-6 Luna, dearest first.
| Model | API, per 1M in / out | Input price against GPT-6 Luna | Average reply in our runs | On Pro |
|---|---|---|---|---|
| GPT-6 AstraOpenAI | $10.00 / $50.00 | 100 times GPT-6 Luna's | $0.0117 | Up to 31 a month |
| GPT-6 SolOpenAI | $2.00 / $10.00 | 20 times GPT-6 Luna's | $0.0026 | Up to 125 a month |
| GPT-6 LunaOpenAIThis page | $0.10 / $0.50 | – | $0.00012 | Up to 60 a day |
GPT-6 Luna in OpenAI's own plans
What OpenAI's own subscriptions say about GPT-6 Luna, in their words, set beside llmwise's count. Each was checked on the day shown; we drop a plan from this page when its facts are more than 45 days old.
ChatGPT Plus, $20 a month
GPT-6 Luna on ChatGPT Plus: Listed; no published count. On llmwise Pro ($20 a month): up to 60 GPT-6 Luna messages a day. ChatGPT Plus vs llmwise.
Sources: OpenAI Help Center: What is ChatGPT Plus?, OpenAI Help Center: Managing usage with GPT-6 Astra in Work and Codex and ChatGPT pricing, checked .
ChatGPT Pro, $100 or $200 a month
GPT-6 Luna on ChatGPT Pro: Listed; no published count. On llmwise Pro ($20 a month): up to 60 GPT-6 Luna messages a day. ChatGPT Pro vs llmwise.
Sources: OpenAI Help Center: About ChatGPT Pro tiers, OpenAI Help Center: GPT-6 Pro in ChatGPT and ChatGPT pricing, checked .
GPT-6 Luna's own page: GPT-6 Luna: price, limits and messages on every plan. GPT-6 Luna passed 47 of the 50 test prompts these costs come from.
Questions
How much does a GPT-6 Luna message cost?
In our test runs, $0.00012 a reply on average through OpenRouter (median $0.000091), across 50 GPT-6 Luna replies to our test prompts. At the API price a typical GPT-6 Luna message of 4,000 tokens in and 700 out costs $0.0008; a long chat costs more, because every reply rereads it.
What is GPT-6 Luna's API price?
$0.10 per million input tokens and $0.50 per million output tokens, as of September 2026 (OpenAI's list price).
How many GPT-6 Luna messages does llmwise Pro include?
Up to 60 GPT-6 Luna messages a day on Pro ($20 a month), refilled at 00:00 UTC, on top of the monthly allowance.
Can I use GPT-6 Luna for free?
Yes, to try: GPT-6 Luna is in llmwise's one-time free trial of 5 messages.
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