GPT-6 Luna API Pricing
GPT-6 Luna costs $0.10 per 1M input tokens and $0.50 per 1M output tokens. These rates were last verified on .
Upgrading to GPT-6 Luna?
Same token usage, 3:1 input:output, standard list rates · excludes cache, batch and fast mode. Not a quality or compatibility claim. Full calculator →
OpenAI small general text pricing history
USD · units shown per rate- Input: $0.10 / 1M tokensOutput: $0.50 / 1M tokensRate first observedLatestVerified 2026-11-12
- Input: $0.20 / 1M tokensOutput: $1.20 / 1M tokensRate first observedAvailable · older versionVerified 2026-11-12
1 recorded price changes
- Input: $0.20 / 1M tokens · Output: $1.20 / 1M tokens — observed Jul 31, 2026
- Input: $1.00 / 1M tokens · Output: $6.00 / 1M tokens — observed Jun 28, 2026 (first recorded)
- Input: $0.75 / 1M tokensOutput: $4.50 / 1M tokensRate first observedAvailable · older versionVerified 2026-11-12
- Input: $0.20 / 1M tokensOutput: $1.25 / 1M tokensRate first observedDeprecated · 2027-04-01Verified 2026-11-12
- Input: $0.25 / 1M tokensOutput: $2.00 / 1M tokensRate first observedDeprecated · 2026-12-11Verified 2026-11-12
- Input: $0.05 / 1M tokensOutput: $0.40 / 1M tokensRate first observedDeprecated · 2026-12-11Verified 2026-11-12
- Input: $0.40 / 1M tokensOutput: $1.60 / 1M tokensRate first observedDeprecated · 2027-01-14Verified 2026-11-12
- Input: $0.10 / 1M tokensOutput: $0.40 / 1M tokensRate first observedShut downVerified 2026-11-12
- Input: $0.15 / 1M tokensOutput: $0.60 / 1M tokensRate first observedDeprecated · 2027-01-14Verified 2026-11-12
Newest first. Release dates describe the model, not when today's rates took effect. Observations show when we recorded rates, not launch pricing. Image and text token meters are separate; no fixed image-token savings mix is assumed. How we verify
Published rates and billing units
| Billing dimension | USD list price |
|---|---|
| Input / 1M tokens | $0.10 |
| Cached input / 1M tokens | $0.01 |
| Cache write (30 minutes) / 1M tokens | $0.125 |
| Requests above 272,000 input tokens: Input / 1M tokens | $0.20 |
| Requests above 272,000 input tokens: Cached input / 1M tokens | $0.02 |
| Requests above 272,000 input tokens: Cache write (30 minutes) / 1M tokens | $0.25 |
| Requests above 272,000 input tokens: Output / 1M tokens | $0.75 |
| Output / 1M tokens | $0.50 |
| Batch: Input / 1M tokens | $0.05 |
| Batch: Cached input / 1M tokens | $0.005 |
| Batch: Cache write (30 minutes) / 1M tokens | $0.0625 |
| Batch: Output / 1M tokens | $0.25 |
| Batch: Requests above 272,000 input tokens: Input / 1M tokens | $0.10 |
| Batch: Requests above 272,000 input tokens: Cached input / 1M tokens | $0.01 |
| Batch: Requests above 272,000 input tokens: Cache write (30 minutes) / 1M tokens | $0.125 |
| Batch: Requests above 272,000 input tokens: Output / 1M tokens | $0.375 |
Verified 2026-11-12 · Official source · Pricing methodology. Taxes, optional services and account-specific discounts are not included.
Decisions API: separate GPT-6 Luna rates
Decisions uses gpt-6-luna through the dedicated /v1/decisions endpoint. It charges input tokens only; this is not a price cut to Luna on the Responses API, and the standard model calculators do not estimate Decisions usage.
| Input length | Input | Cached input | Output | 30m cache write | 12h cache write |
|---|---|---|---|---|---|
| Up to 272K input tokens | $0.10 | $0.01 | $0.00 | $0.125 | $0.25 |
| Above 272K input tokens (whole request) | $0.20 | $0.02 | $0.00 | $0.25 | $0.50 |
Verified . Official Decisions pricing and availability · Caching and regional pricing · Endpoint pricing JSON · Pricing methodology. Taxes and account-specific discounts are excluded.
Prompt cache reads are discounted; 30-minute and 12-hour cache writes are charged separately. Requests above 272K input tokens use long-context pricing for the whole request. Eligible regional processing carries a 10% uplift. GPT-Live voice and other model or tool usage are billed separately; no ChatGPT subscription entitlement is implied.
Generally available for text, images and native JSON, with up to 400 questions per request. Supported answer types are probability (predicate), choice and score—not general text generation. US and EU regional processing, Zero Data Retention and HIPAA support are subject to OpenAI eligibility requirements.
Cost examples
These examples use published list prices only. They exclude taxes, enterprise discounts, minimum charges, retries, batch discounts, and provider-specific billing rules.
1M input + 1M output
$0.95
A direct per-million comparison against every other text model.
100K input + 25K output
$0.0225
A compact chat, summarization, or analysis workload.
10M input + 2M output
$3.50
A monthly production estimate for heavier RAG or agent traffic.
75% cached input + 250K output
$0.2525
Cached input is about 90% cheaper than standard input at list price.
We tested this model at different reasoning-effort levels in a Labs experiment →
Calculator for GPT-6 Luna
Enter your own input, output, and cached-token assumptions. This calculator is preloaded with only GPT-6 Luna, so the result stays focused on this model.
Input cost
$0.20
Output cost
$0.75
Total
$0.95
Long-context rates apply because this request exceeds 272,000 input tokens.
Price history
No list-price movement across 50 daily snapshots from 2026-09-23 to 2026-11-11.
When to use GPT-6 Luna
Good fit
- high-volume routing, classification, extraction, summaries, and fallback traffic
- long-document and repository-scale prompts where context window matters
Be careful with
- blind migration without testing your own prompts, latency, and failure modes