Identity
- Status
- active
- Developer ID
gpt-5.6-luna- Released
- Not reported
- Version
- GPT-5.6 Luna
- License
- Unknown
OpenAIGPT-5.6 Luna
GPT-5.6 Luna is OpenAI's API model for cost-sensitive, high-volume workloads.
- Token context
- 1,050K tokens
- Inputs
- Text, Image
- Outputs
- Text
- Released
- Not reported
Providers & Pricing
Estimate workload cost →| Provider | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M | Observed | Evidence |
|---|---|---|---|---|---|---|
OpenaiAvailable | $0.20 | $1.20 | $0.020 | — | Sep 3, 2026 | Provider-reported |
 OpenrouterAvailable | $0.20 | $1.20 | $0.020 | — | Oct 19, 2026 | Provider-reported |
Benchmarks
All benchmark results →| ARC-AGI-1verified-v1-613c385b0c93 | 90.67 | — | — | GPT-5.6 Luna 2026-07-30 (Max)unknown | Original sourcewinner eligible | Third-party benchmark |
| ARC-AGI-2verified-v2-be40992860f9 | 59.58 | — | — | GPT-5.6 Luna 2026-07-30 (Max)unknown | Original sourcewinner eligible | Third-party benchmark |
| LiveBench2026-06-25-90f8d44da965 | 77.05 | 21,799 | 1,270 | gpt-5.6-luna-maxaverage per case | Recomputedwinner eligible | Third-party benchmark |
| LMArena Document Arenadocument-2026-09-13-a64ca3b12b6e | 1,456.92 | — | 5,766 | gpt-5.6-luna-xhigh; 95% CI [1448.72029252, 1465.11301394]; votes 5766; rank 23unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e | 1,430.66 | — | 41,109 | gpt-5.6-luna-xhigh; 95% CI [1426.38028671, 1434.93119450]; votes 41109; rank 93unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e | 1,258.24 | — | 11,086 | gpt-5.6-luna-xhigh; 95% CI [1250.82216689, 1265.66350676]; votes 11086; rank 58unknown | Original sourcewinner eligible | Third-party benchmark |
| ToneBench2026-10-17-10-task-e9c76358afb2 | 78.83 | 19,621 | 50 | GPT-5.6 Luna (ultra)average per case | Original sourcenot winner eligible | Third-party benchmark |
| ToneBench2026-10-17-10-task-e9c76358afb2 | 76.66 | 3,244 | 50 | GPT-5.6 Luna (medium)average per case | Original sourcenot winner eligible | Third-party benchmark |
At a Glance
Model Facts
Capacity
- Token context
- 1,050K tokens
- Maximum output
- 128K tokens
- Total parameters
- Unknown
- Active parameters
- Unknown
- Knowledge cutoff
- Feb 16, 2026
Interface and Access
- Inputs
- Text, Image
- Outputs
- Text
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- Reasoning
- Yes
- Vision
- Yes
- Tool calling
- Yes
- Capabilities
- chat, generation, reasoning, tools
This page represents one developer model product. Dated API snapshots, serving endpoints, pricing, regions, quantizations, and service tiers attach as versioned aliases or provider details and never create duplicate public model records.
Version Lineage
PredecessorUnknown
SuccessorsUnknown
Aliasesgpt-5.6-luna
Explicit Unknowns
- Release date
- Architecture
- Tokenizer
Primary Evidence
Sources and Observation Date
Comparable Peers
Related Model Comparisons
| A | Pair | B | Context |
|---|---|---|---|
GPT-5.6 LunaOpenAI | vs | GPT-6 AstraOpenAI | family variantsimage, text |
GPT-5.6 LunaOpenAI | vs |  MiniMax M3MiniMax | cross-developer peersimage, text |
GPT-5.6 LunaOpenAI | vs | Claude Sonnet 5Anthropic | cross-developer peersimage, text |
GPT-5.6 LunaOpenAI | vs | GPT-6 LunaOpenAI | family variantsimage, text |
GPT-5.6 LunaOpenAI | vs | Claude Fable 5Anthropic | cross-developer peersimage, text |
GPT-5.6 LunaOpenAI | vs | Claude Opus 4.8Anthropic | cross-developer peersimage, text |
GPT-5.6 LunaOpenAI | vs |  Gemini 2.5 ProGoogle DeepMind | cross-developer peerstext |
GPT-5.6 LunaOpenAI | vs | cross-developer peersimage, text | |
GPT-5.6 LunaOpenAI | vs | cross-developer peersimage, text | |
GPT-5.6 LunaOpenAI | vs | GPT-4.1 NanoOpenAI | family variantsimage, text |
GPT-5.6 LunaOpenAI | vs | GPT-5.4 MiniOpenAI | family variantsimage, text |
GPT-5.6 LunaOpenAI | vs | GPT-5.4 ProOpenAI | family variantsimage, text |
Questions
GPT-5.6 Luna FAQs
What is GPT-5.6 Luna?+
GPT-5.6 Luna is OpenAI's API model for cost-sensitive, high-volume workloads. It is developed by OpenAI and its current sourced lifecycle status is active.
What inputs and outputs does GPT-5.6 Luna support?+
GPT-5.6 Luna's current record lists Text and Image as input and Text as output.
How much context does GPT-5.6 Luna support?+
The current record lists a 1,050K-token context window and a maximum output of 128K tokens.
Is GPT-5.6 Luna available through an API?+
GPT-5.6 Luna is marked as API-available. The directly sourced provider records currently include Openai and Openrouter.
How much does GPT-5.6 Luna cost through an API?+
The lowest directly sourced prices currently attached to GPT-5.6 Luna are $0.20 per million input tokens through Openai and $1.20 per million output tokens through Openai. Prices are provider-specific and should be checked against each cited observation date.
What capabilities and tasks does GPT-5.6 Luna support?+
GPT-5.6 Luna's recorded capabilities are chat, generation, reasoning, and tools. Its supported tasks are image and text.
Can GPT-5.6 Luna be self-hosted?+
GPT-5.6 Luna is not marked as an open-weight model. Self-hosting is marked as unsupported, with no license recorded.
Does GPT-5.6 Luna have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are gpt-5.6-luna.
Which models can GPT-5.6 Luna be compared with?+
The current compatible peer set includes GPT-6 Astra, MiniMax M3, Claude Sonnet 5, GPT-6 Luna, and Claude Fable 5. Compatibility requires shared sourced modalities and tasks; it does not imply that one model is better. Browse model comparisons →
How current is the Model Markets record for GPT-5.6 Luna?+
GPT-5.6 Luna was last verified Aug 28, 2026 from OpenAI's primary source, “Models | OpenAI API.” The evidence is classified as official fact.