GPT-5.6 Luna Pro
OpenAI · released Jul 9, 2026
- Type
- Proprietary
- Input
- $0.50
- Output
- $3.00
- Cached
- $0.050
List price · per 1M tokens · OpenAI at 1.1M context · source ↗
Our take
Written Aug 3, 2026GPT-5.6 Luna Pro is a proprietary multimodal model from OpenAI that handles text, images and files across a one-million-token request limit. It is available through three providers with tiered throughput options, though no benchmark scores are yet in our data.
Pick this for long-document analysis at over one million tokens, or for budget multimodal inference through OpenAI or OpenRouter. Choose the Azure route if you need guaranteed throughput at 161 tokens per second. Skip it if you need measured quality scores to compare against peers, or if you want to self-host or avoid proprietary lock-in.
The case for it
- One of the longest request limits we track, at 1,050,000 tokens.
- Wide throughput choice on Azure: a 2.6× speed jump for a modest price step-up.
- Same entry-level rate on both OpenAI direct and OpenRouter.
The case against it
- No measured quality scores in our data — no Elo, MMLU or other benchmarks listed.
- Premium tier costs four times the entry rate with no verified throughput gain in our data.
- Azure's cheapest tier is slower and costs more than OpenAI direct.
How good is it?
We hold no score for this model.
We look for every model we track on every board we watch, and none of them has turned up GPT-5.6 Luna Pro — so there is no intelligence, coding, agentic or writing score to show you, not a low one, none.
Or rent it from someone else
Why this differs from the header. The strip above quotes OpenAI's own list price. This is the cheapest live offer at the widest standard context we hold, whoever is serving it — a reseller undercutting a lab is ordinary commerce, not an error.
- per 1M tokens
- $0.50 in / $3.00 out
- Context served
- 1.1M
- Throughput
- Not measured
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouter | $0.50 / $3.00 | 1.1M | not measured | Unknown | Unknown | Unknown |
| OpenAIflex tier | $0.50 / $3.00 | 1.1M | not measured | No | Yesunknown period | Unknown |
| OpenAI | $0.50 / $3.00 | 1.1M | 98 tok/s | No | Yesunknown period | Unknown |
| Microsoft Azure AI | $1.00 / $6.00 | 1.1M | 124 tok/s | No | No | Confirmed |
| Microsoft Azure AIeu | $1.10 / $6.60 | 1.1M | 161 tok/s | No | No | Confirmed |
| OpenAIpriority tier | $2.00 / $12.00 | 1.1M | not measured | No | Yesunknown period | Unknown |
Microsoft Azure AIAcross the 6 listings we hold: 5 say they do not train on prompts, 0 say they do and 1 do not say. 2 appear in the zero-retention registry we check; the rest are unknown to us rather than confirmed either way.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
- ✓
- Supported
- ✗
- Not supported
- Not published
- host gave no parameter list
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenRouter | ✓ | ✓ | ✓ |
| OpenAIflex | ✓ | ✓ | ✓ |
| OpenAI | ✓ | ✓ | ✓ |
| Microsoft Azure AI | ✓ | ✓ | ✓ |
| Microsoft Azure AIeu | ✓ | ✓ | ✓ |
| OpenAIpriority | ✓ | ✓ | ✓ |
Tool calling: 6 of 6 listings say yes. JSON output: 6 of 6 listings say yes. Strict schema: 6 of 6 listings say yes.
When we formed this view
Dates behind this page
Prices last checked 9d ago
What we do not know about this model yet
- No board we watch has turned up a score, so we hold no quality figures at all.
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 6 listings do not say whether they train on prompts.
Licence and identifiers
What the licence allowsWe hold no licence record for this model. Inside are the identifiers you need to pull it — its Hugging Face repo where we have one, our slug and a machine-readable card.
Licence
Commercial API terms. We hold no licence record for this model, so there is nothing to summarise here.
Identifiers
- Modality record
- text+image+file->text
- Catalogue slug
- openai-gpt-5-6-luna-pro