Model specification · OpenAI
GPT-6 Luna
openai/gpt-6-luna
GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic...
SpecificationsReported values
- Context window
- 1.1M
- Maximum output
- 128K
- Architecture
- text+image+file->text
- Tokenizer
- GPT
- Knowledge cutoff
- —
- Moderated
- Yes
- Input modalities
- fileimagetext
- Output modalities
- text
Full pricingUSD where reported
| Price | Standard |
|---|---|
| Input | $0.100 / M |
| Output | $0.500 / M |
Benchmark indexesReported indexes
- Intelligence
- 38.1
- Coding
- —
- Agentic
- —
- Design Arena Elo
- —
Example workload costsStandard pricing only
| Workload | Input / output | Cache share | Estimated cost |
|---|---|---|---|
| Quick check | 10K / 1K × 1 | 0% | $0.00150 |
| Long analysis | 100K / 4K × 1 | 50% | $0.00750 |
| Workday | 20K / 2K × 1,000 | 30% | $2.46 |
More from OpenAIAll OpenAI models
| Model | Context | Input / M | Output / M | Intel. |
|---|---|---|---|---|
| GPT-6 Astra | 1.1M | $10.00 | $50.00 | 52.7 |
| GPT-6.1 Sol | 1.1M | $2.00 | $10.00 | 51.8 |
| GPT-6 Sol | 1.1M | $2.00 | $10.00 | 47.6 |
| GPT-5.6 Sol | 1.1M | $2.00 | $10.00 | 47 |
| GPT-5.6 Terra | 1.1M | $2.00 | $12.00 | 42.1 |
| GPT-5.5 | 1.1M | $5.00 | $30.00 | 38.4 |
| GPT-5.6 Luna | 1.1M | $0.200 | $1.20 | 37.3 |
| GPT-5.4 Mini | 400K | $0.750 | $4.50 | 24.1 |
| GPT-5.4 Nano | 400K | $0.200 | $1.25 | 20.7 |
| GPT-5 Mini | 400K | $0.250 | $2.00 | 16.8 |
| gpt-oss-120b | 131K | $0.037 | $0.170 | 11.6 |
| o3 Mini High | 200K | $1.10 | $4.40 | 11 |