openai
OpenAI: GPT-5.6 Luna (batch)
GPT-5.6 Luna from OpenAI is a powerful AI with a vast context length of 1,050,000 tokens and supports multiple input modalities including text, images, and files; it can also handle reasoning tasks and tools. While it excels in certain areas like coding, its agentic performance is lower compared to other benchmarks. Considering its price at $0.1 per million input tokens and $0.6 per million output tokens, GPT-5.6 Luna might be suitable for businesses or projects requiring extensive text processing and reasoning capabilities, despite its higher cost. Its benchmark score of 88.2 across three independent tests makes it a solid choice for those who prioritize performance.
Quality Score
100/100
price + capability + benchmarks
Input Price
$0.10
per 1M tokens
Output Price
$0.60
per 1M tokens
Context Window
1,050,000
tokens
Benchmark results
Independent, published benchmarks. Blended score 88.2 across 3 benchmarks, last refreshed 2026-08-08. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 86.3 |
| AI Index Coding | software engineering tasks | 100.0 |
| AI Index Agentic | multi-step tool-using tasks | 77.4 |
- 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 |
Strong choice for
Data
JSON Extraction
Pulling structured fields out of unstructured text.
Data
Bulk Data Labeling
Cheaply tagging thousands of items with consistent labels.
Writing
Short-Form Summarization
TL;DRs of articles and emails at scale.
Writing
Email Drafting
Cold emails, replies, and outreach at the right tone.
Education
Language Learning
Conversational practice, grammar drills, vocabulary.
Business
Customer Support
Replying to tickets and chats accurately.
Category rankings
Where OpenAI: GPT-5.6 Luna (batch) places across the 42 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #2 | Bulk Data LabelingData · of 25 ranked | 135 |
| #2 | Customer SupportBusiness · of 25 ranked | 135 |
| #2 | Dataset AnnotationResearch · of 25 ranked | 145 |
| #3 | JSON ExtractionData · of 25 ranked | 149 |
| #3 | Short-Form SummarizationWriting · of 25 ranked | 132 |
| #3 | Email DraftingWriting · of 25 ranked | 128 |
| #3 | Language LearningEducation · of 25 ranked | 128 |
| #3 | Image CaptioningVision · of 25 ranked | 121 |
| #3 | Chat CompanionPersonal · of 25 ranked | 132 |
| #3 | Trivia & General KnowledgePersonal · of 25 ranked | 122 |
| #5 | Sales / Cold EmailBusiness · of 25 ranked | 124 |
| #5 | Job Application DraftingBusiness · of 25 ranked | 124 |
| #5 | Journaling HelperPersonal · of 25 ranked | 124 |
| #5 | Recipe GenerationPersonal · of 25 ranked | 124 |
| #10 | Code CompletionCode · of 25 ranked | 133 |
| #11 | Resume WritingBusiness · of 25 ranked | 118 |
| #13 | Regex WritingCode · of 25 ranked | 137 |
| #13 | Social Media PostsWriting · of 25 ranked | 119 |
| #13 | Language TranslationWriting · of 25 ranked | 137 |
| #13 | Voice Assistant BackendVoice · of 25 ranked | 123 |
| #13 | Tutoring for KidsPersonal · of 25 ranked | 137 |
| #15 | SOP / Process DocsBusiness · of 25 ranked | 138 |
| #16 | Meeting NotesBusiness · of 25 ranked | 152 |
| #17 | Code DocumentationCode · of 25 ranked | 143 |
| #17 | Function / Tool CallingAgents · of 25 ranked | 154 |
| #18 | CSV / Spreadsheet CleanupData · of 25 ranked | 154 |
| #19 | Self-Hosted / LocalCost · of 25 ranked | 117 |
| #20 | Screenshot DebuggingVision · of 25 ranked | 142 |
| #21 | Diagram ExtractionVision · of 25 ranked | 149 |
| #22 | Frontend Component DesignCode · of 25 ranked | 146 |
| #22 | Marketing CopyWriting · of 25 ranked | 131 |
| #22 | Standardized Test PrepEducation · of 25 ranked | 131 |
| #22 | Chart & Graph ReadingVision · of 25 ranked | 152 |
| #23 | SQL GenerationCode · of 25 ranked | 172 |
| #23 | OCR / Document ParsingData · of 25 ranked | 146 |
| #23 | Table Extraction from PDFsData · of 25 ranked | 146 |
| #23 | Browser AutomationAgents · of 25 ranked | 171 |
| #23 | Real-Time ChatLatency · of 25 ranked | 117 |
| #25 | Data AnalysisData · of 25 ranked | 171 |
| #25 | Blog Post WritingWriting · of 25 ranked | 140 |
| #25 | Trip PlanningPersonal · of 25 ranked | 140 |
| #25 | Cheap Bulk InferenceCost · of 25 ranked | 137 |
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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.