GPT-5.6 Luna — pricing & specs
GPT-5.6 Luna is a fast model from OpenAI, at capability tier 5 of 8. Live $/M-token pricing and specs from the Mintok catalog, as of 2026-08-09.
$/M-token pricing
as of 2026-08-09 · OpenAIWhat GPT-5.6 Luna costs in practice
At $1.20/M output tokens, GPT-5.6 Luna is the 1st-cheapest of 14 priced tier-5 models in the Mintok catalog — about 76% below the tier median of $5/M.
| Scenario | Est. cost |
|---|---|
| 1M input + 1M output tokens | $1.40 |
| A 10K-token request (8K in / 2K out) | $0.0040 |
| 1,000 agent runs (~2K in / 500 out each) | $1.00 |
| 1M-token RAG chat session (900K cached in / 100K out) | $0.210 |
Estimated from list price (as of 2026-08-09) at the token mixes shown; your real cost depends on prompt/response length and cache hit-rate. Model your own volume →
Specifications
- Vendor
- OpenAI
- Family
- GPT- Luna
- Capability tier
- 5 / 8
- Size class
- FAST
- Category
- GENERAL
- Context window
- 1,050,000 tokens
- Licensing
- Proprietary
Alternatives at tier 5
Same capability tier, sorted by output price — the cheaper-capable options.
- Qwen3.7 PlusAlibaba$1.28/M out
- Mistral Large 3Mistral$1.50/M out
- Grok 4.3xAI$2.50/M out
- Gemini 3 Flash PreviewGoogle$3/M out
- Kimi K2.6Moonshot$4/M out
- Magistral MediumMistral$5/M out
FAQ
How much does GPT-5.6 Luna cost per token?
GPT-5.6 Luna costs $0.20 per million input tokens and $1.20 per million output tokens (cached input $0.10/M), via OpenAI, as of 2026-08-09.
Is GPT-5.6 Luna expensive?
At $1.20/M output tokens, GPT-5.6 Luna is the 1st-cheapest of 14 priced tier-5 models in the Mintok catalog — about 76% below the tier median of $5/M.
What does a typical request with GPT-5.6 Luna cost?
At list price, a 10K-token request (8K in / 2K out) with GPT-5.6 Luna costs about $0.0040, and 1,000 agent runs (~2K in / 500 out each) about $1.00.
What is GPT-5.6 Luna's context window?
GPT-5.6 Luna supports a 1,050,000-token context window.
What capability tier is GPT-5.6 Luna?
GPT-5.6 Luna sits at capability tier 5 of 8 on the Mintok scale (FAST size class).
Is GPT-5.6 Luna open-source or proprietary?
GPT-5.6 Luna is a proprietary model from OpenAI, accessed via API.
Put GPT-5.6 Luna to work
Benchmark it on your prompts, or size a deployment and compare $/M-token against alternatives.
Pricing and specs are maintained by Mintok's catalog watchers from public sources. Not investment advice. Methodology.