GPT-5.6 Luna
DeprecatesGPT-5.6 Luna is OpenAI's language model with a 1.1M context window and up to 128K output tokens, available from 6 providers, starting at $0.1 / 1M input and $0.6 / 1M output. A cost-optimized LLM in the GPT-5.6 family targeting high-volume workloads, corresponding to the nano tier of earlier GPT-5 families.
| Benchmarks | |
|---|---|
| Intelligence Index | #20 |
| Coding Index | #16 |
| GPQA | #24 |
| HLE | #29 |
| Time to First Token | #521 |
| SciCode | #24 |
| LCR | #15 |
| Output TPS | #31 |
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities7/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling✓
Structured Outputs✓
Native JSON Schema✓
Web Search✓
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | Batch | ||||||
|---|---|---|---|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Cache Write 5m $ / 1M | Web Search $ / request | Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
| $0.22 | $1.32 | $0.022 | $0.275 | N/A | — | — | — | |
| $0.2 | $1.20 | $0.02 | N/A | N/A | — | — | — | |
| $0.2 | $1.20 | $0.02 | $0.25 | N/A | $0.1 | $0.6 | $0.01 | |
| $0.2 | $1.20 | $0.02 | $0.25 | $0.010 | — | — | — | |
| $0.1 | $0.6 | $0.01 | N/A | N/A | — | — | — | |
| $1.20 | $7.20 | N/A | N/A | N/A | $0.6 | $3.60 | N/A | |
| $0.2 | $1.20 | $0.02 | $0.25 | N/A | — | — | — | |
| $0.4 | $2.40 | $0.04 | N/A | N/A | — | — | — | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| GPT-5.6 Luna | 1.1M | $0.100 | $0.600 | Current | |
| GPT-5.6 Sol | 1.1M | $1.25 | $7.50 | Deprecating | |
| GPT-5.6 Terra | 1.1M | $1.00 | $6.00 | Deprecating | |
| GPT-5.5 | 1.1M | $2.50 | $15.00 | Available | |
| GPT-5.4 Mini | 400K | $0.375 | $2.25 | Deprecating | |
| GPT-5.4 Nano | 400K | $0.100 | $0.625 | Deprecating | |
| GPT-5.4 | 1.1M | $1.25 | $7.50 | Deprecating | |
| GPT-5.3 Codex | 400K | $1.75 | $14.00 | Deprecating | |
| GPT-5.2 Codex | 400K | $1.75 | $14.00 | Deprecated | |
| GPT-5.2 | 410K | $0.875 | $7.00 | Deprecating | |
| GPT-5.1 | 410K | $0.625 | $5.00 | Deprecating |