GPT-5.6 Luna: API pricing, providers and specs
GPT-5.6 Luna is a text model by OpenAI. 30 providers serve it, from $0.96 to $6 /1M; the lowest price is at APIMart.
A newer version is out: GPT-6 Luna · released Sep 22, 2026
How GPT-5.6 Luna compares
Against the 737 text models on the site priced the same way.
- Mid-priced: its lowest price is $0.96 /1M against a median of $1.10; 48% of comparable models cost less.
- Its 1.05M-token context window is larger than 95% of them (median 262K), about 1580 pages of text.
- On LMArena's WebDev board it ranks #43 of the 64 comparable models scored there.
- 30 providers serve it; 97% of comparable models have fewer.
GPT-5.6 Luna prices by provider
Every provider's list price, read from its own price page or API. A price marked “from” changes with context length, resolution or mode.
| Provider | Input | Output | Prompt caching | Context |
|---|---|---|---|---|
| APIMart | $0.16/1M | $0.96/1M | — | — |
 CometAPI | $0.16/1M | From$0.96/1M | — | — |
 Kenari | $0.193/1M | $1.10/1M | $0.019/1M | — |
| OpenAIOfficial | $0.20/1M | From$1.20/1M | $0.02/1M | — |
| ZenMux | $0.20/1M | From$1.20/1M | $0.02/1M | 1.05M |
 CrossModel | $0.20/1M | From$1.20/1M | $0.02/1M | — |
 Opper | $0.20/1M | $1.20/1M | $0.02/1M | — |
 Requesty | $0.20/1M | From$1.20/1M | $0.02/1M | 1.05M |
 Ofox | $0.20/1M | $1.20/1M | $0.02/1M | 1.05M |
 Venice AI | $0.20/1M | $1.20/1M | $0.02/1M | — |
 Boundless | $0.20/1M | $1.20/1M | $0.02/1M | — |
 OrcaRouter | $0.20/1M | $1.20/1M | $0.02/1M | 1.05M |
| Vercel AI Gateway | $0.20/1M | From$1.20/1M | $0.02/1M | 1.05M |
 NEAR AI Cloud | $0.20/1M | $1.20/1M | $0.02/1M | 1.05M |
 Prime Inference | $0.20/1M | From$1.20/1M | — | — |
 AIHubMix | $0.20/1M | From$1.20/1M | $0.02/1M | 1.05M |
 Impossibl | $0.20/1M | From$1.20/1M | $0.02/1M | — |
| OpenRouter | $0.20/1M | From$1.20/1M | $0.02/1M | 1.05M |
| DevPass (LLM Gateway) | $0.20/1M | From$1.20/1M | $0.02/1M | — |
 Perplexity | $0.20/1M | From$1.20/1M | $0.02/1M | — |
 APIYI | $0.20/1M | $1.20/1M | — | — |
 LaoZhang API | $0.20/1M | $1.20/1M | — | — |
 CrazyRouter | $0.20/1M | $1.20/1M | — | — |
| Atlas Cloud | $0.20/1M | $1.20/1M | $0.02/1M | — |
 Azure | $0.20/1M | From$1.20/1M | $0.02/1M | — |
 FastRouter | $0.20/1M | From$1.20/1M | $0.02/1M | 1.05M |
 Jiekou.AI | $0.20/1M | $1.20/1M | $0.02/1M | — |
| AI/ML API | $0.212/1M | $1.27/1M | $0.021/1M | — |
 Cortecs | $0.221/1M | $1.33/1M | $0.022/1M | — |
| Replicate | $1/1M | $6/1M | — | — |
- APIMart$0.96
- CometAPIFrom$0.96
- Kenari$1.10
- Opper$1.20
- Ofox$1.20
- Venice AI$1.20
- Boundless$1.20
- OrcaRouter$1.20
- NEAR AI Cloud$1.20
- APIYI$1.20
- LaoZhang API$1.20
- CrazyRouter$1.20
Specs
- Type
- Text
- Maker
- OpenAI
- Inputs
- Image, Text
- Outputs
- Text
- Context
- 1.05M≈ 1580 pages of text
- Max output
- 128K
- Capabilities
- Prompt caching, JSON, Reasoning, Tool calling, Vision
- Released
- Jul 9, 2026
- License
- proprietary
- Open weights
- No, API only
- Arena score
- 1519WebDev
- Monthly searches
- 33K
Alternatives to GPT-5.6 Luna
Same kind of model from other makers, at a similar price.
| Model | Lowest price | Context | Arena | Providers |
|---|---|---|---|---|
| GPT-5.6 Lunathis model | $0.96/1M | 1.05M | 1519 | 30 |
 GLM-5.3 | $1.10/1M | 1.05M | 1623 | 49 |
 Gemini 3 Flash | $2.40/1M | 1.05M | 1466 | 5 |
 Mistral Large 4 | $2.09/1M | 1.05M | 1543 | 13 |
 Qwen3.8 27B | $0.50/1M | 262K | 1591 | 33 |
| Sonar | $1/1M | 127K | — | 9 |
| GLM-5.2 | $1.80/1M | 1M | 1604 | 44 |
| Grok Build 0.1 | $1.60/1M | 256K | — | 18 |
 MiMo-V2.6-Pro | $0.696/1M | 1.05M | 1625 | 21 |
More from OpenAI
GPT-5.6 Luna FAQ
APIMart, at $0.96 /1M. 30 providers serve GPT-5.6 Luna; the table above lists every one with its price.
GPT-5.6 Luna reads up to 1.05M tokens per request and writes up to 128K.
No. GPT-5.6 Luna is only available through an API; OpenAI does not publish its weights.
30 API providers serve GPT-5.6 Luna. Compare their prices above, or open a provider to see everything it offers.
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