GPT-5.6 Luna
GPT-5.6 Luna is OpenAI's language model with a 1.1M context window and up to 128K output tokens, available from 9 providers, starting at $0.2 / 1M input and $1.20 / 1M output. A cost-optimized LLM in the GPT-5.6 family targeting high-volume workloads, corresponding to the nano tier of earlier GPT-5 families.
| Benchmarks | |
|---|---|
| Intelligence Index | #36 |
| Coding Index | #23 |
| GPQA | #33 |
| HLE | #41 |
| Time to First Token | #392 |
| SciCode | #32 |
| LCR | #10 |
| Output TPS | #76 |
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities7/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling✓
Structured Outputs✓
Native JSON Schema✓
Web Search✓
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | Flex | Fast | Long context | Batch | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Cache Write 5m $ / 1M | Web Search $ / request | Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Cache Write 5m $ / 1M | Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Cache Write 5m $ / 1M | Input $ / 1M | Output $ / 1M | Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Web Search $ / request | |
| $0.2 | $1.20 | $0.02 | $0.25 | N/A | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
| $0.22 | $1.32 | $0.022 | $0.275 | N/A | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
| $0.264 | $1.58 | $0.0264 | $0.33 | N/A | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
| $0.2 | $1.20 | $0.02 | $0.25 | N/A | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
| $0.22 | $1.32 | $0.022 | $0.275 | N/A | N/A | N/A | N/A | N/A | $0.44 | $2.64 | $0.044 | $0.55 | — | — | — | — | — | — | |
| $0.2 | $1.20 | $0.02 | $0.25 | N/A | $0.1 | $0.6 | $0.01 | $0.125 | $0.4 | $2.40 | $0.04 | $0.5 | — | — | — | — | — | — | |
| $1.00 | $6.00 | $0.1 | $1.25 | N/A | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
| $0.2 | $1.20 | $0.02 | $0.25 | N/A | $0.1 | $0.6 | $0.01 | $0.125 | $0.4 | $2.40 | $0.04 | $0.5 | — | — | $0.1 | $0.6 | $0.01 | N/A | |
| $0.2 | $1.20 | $0.02 | $0.25 | $0.010 | — | — | — | — | — | — | — | — | — | — | N/A | N/A | N/A | N/A | |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | $0.1 | $0.6 | $0.01 | $0.010 | |
| $0.2 | $1.20 | $0.02 | N/A | N/A | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
| $0.24 | $1.44 | N/A | N/A | N/A | — | — | — | — | — | — | — | — | $0.48 | $2.16 | $0.12 | $0.72 | N/A | N/A | |
| $0.2 | $1.20 | $0.02 | $0.25 | N/A | $0.1 | $0.6 | $0.01 | N/A | $0.4 | $2.40 | $0.04 | N/A | — | — | — | — | — | — | |
| $0.8 | $3.60 | $0.08 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | $0.5 | — | — | — | — | — | — | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| GPT-6 Sol | 1.1M | $2.00 | $10.00 | Available | |
| GPT-6 Luna | 1.1M | $0.100 | $0.500 | Available | |
| GPT-6 Astra | 1.1M | $10.00 | $50.00 | Available | |
| GPT-5.6 Luna | 1.1M | $0.200 | $1.20 | Current | |
| GPT-5.6 Sol | 1.1M | $2.00 | $10.00 | Available | |
| GPT-5.6 Terra | 1.1M | $2.00 | $12.00 | Available | |
| GPT-5.5 | 1.1M | $5.00 | $30.00 | Available | |
| GPT-5.4 Mini | 400K | $0.750 | $4.50 | Available | |
| GPT-5.4 Nano | 400K | $0.200 | $1.25 | Available | |
| GPT-5.4 | 1.1M | $2.50 | $15.00 | Available | |
| GPT-5.3 Codex | 400K | $1.75 | $14.00 | Available |