OpenAI: GPT-5.6 Luna (batch)
The OpenAI GPT-5.6 Luna is a large language model that supports three input modalities: file, image, and text. It can handle long context lengths of up to 1 million tokens and generate output up to 128 thousand tokens in length. This model may be suitable for those who need a versatile tool with reasoning capabilities and the ability to support other tools. Its price point is $0.1 per million input tokens and $0.6 per million output tokens, which may be competitive depending on individual needs. While it has a blended benchmark score of 62.3 across one independent benchmark, its standing among others in this space is unclear due to limited coverage data.
Benchmark results
Independent, published benchmarks. Blended score 62.3 across 1 benchmark, last refreshed 2026-09-23. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 61.6 |
- Model ID
- openai/gpt-5.6-luna:batch
- Vendor
- openai
- Released
- July 2026
- Tokenizer
- GPT
- Input Modalities
- file, image, text
- Output Modalities
- text
- Max Output
- 128,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
What it costs in practice
Computed from the current $0.10/M input and $0.60/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.08 |
| A month of a busy support chatbot | 5M in / 2M out | $1.70 |
Category rankings
Where OpenAI: GPT-5.6 Luna (batch) places across the 11 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #13 | Image CaptioningVision · of 25 ranked | 120 |
| #14 | Short-Form SummarizationWriting · of 25 ranked | 126 |
| #14 | Email DraftingWriting · of 25 ranked | 122 |
| #14 | Language LearningEducation · of 25 ranked | 122 |
| #14 | Chat CompanionPersonal · of 25 ranked | 126 |
| #17 | Code CompletionCode · of 25 ranked | 133 |
| #17 | Trivia & General KnowledgePersonal · of 25 ranked | 117 |
| #22 | Sales / Cold EmailBusiness · of 25 ranked | 118 |
| #22 | Job Application DraftingBusiness · of 25 ranked | 118 |
| #22 | Journaling HelperPersonal · of 25 ranked | 118 |
| #22 | Recipe GenerationPersonal · of 25 ranked | 118 |
Similar models
OpenAI: GPT-6 Luna Pro
OpenAI: GPT-6 Luna Pro (batch)
OpenAI: GPT-6 Luna
OpenAI: GPT-6 Luna (batch)
OpenAI: GPT-6 Sol Pro
OpenAI: GPT-6 Sol Pro (batch)
Quick answers
- How much does OpenAI: GPT-5.6 Luna (batch) cost?
- $0.10 per million input tokens and $0.60 per million output tokens.
- What is OpenAI: GPT-5.6 Luna (batch)'s context window?
- 1,050,000 tokens, roughly 1,575 pages of text in a single request.
- Does OpenAI: GPT-5.6 Luna (batch) support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can OpenAI: GPT-5.6 Luna (batch) process images?
- Yes, it accepts image input.