OpenAIGPT-5.6 Luna Pro
GPT-5.6 Luna Pro is an OpenAI proprietary model. It is not yet ranked: no independent benchmark results so far, only pricing and metadata. At $0.450 per million tokens blended it is cheaper than most ranked models. Output speed of 117 tokens per second puts it faster than most, with a first token in 7.2 s.
- Blended price
- $0.450/M
- $0.200 in · $1.20 out
- Output speed
- 117 tok/s
- OpenRouter traffic, 7-day median; not yet measured by Artificial Analysis
- First answer
- 7.24 s
- Context
- 1.1M
- Full answer
- –
- Cost per run
- –
- Released
- –
- date not published by our sources
Versions
OpenAI has shipped 2 models under this name. Each is ranked on its own results; a newer version often has fewer results so far, which holds its index nearer the average until more arrive.
| Model | Released | Index | Rank |
|---|---|---|---|
| GPT-6 Luna Pro | 22 Sept 2026 | – | – |
| GPT-5.6 Luna Prothis page | – | – | – |
No independent quality benchmark results yet — only pricing and metadata.
Where to run it
Every provider serving this model through OpenRouter, with throughput and first-token latency measured on live traffic over the last 30 minutes and each provider’s own price. Purple marks the best in each column.
| Provider | Speed | First token | Input $/M | Output $/M | Context | Quantisation |
|---|---|---|---|---|---|---|
| OpenAI | 113 tok/s | 7.26 s | $0.200 | $1.20 | 1.1M | – |
| Azure | 73 tok/s | 8.50 s | $0.200 | $1.20 | 1.1M | – |
What a task costs
Estimates from list price, output speed and time to first answer for the best configuration. “With caching” assumes three-quarters of the input is served from the prompt cache. Reasoning tokens are not modelled.
| Workload | Tokens in / out | Cost | With caching | Time |
|---|---|---|---|---|
| Chat reply | 400 / 300 | $0.0004 | – | 9.8 s |
| Summarize a 30-page report | 12,000 / 600 | $0.0031 | – | 12.4 s |
| Code edit | 6,000 / 1,500 | $0.0030 | – | 20.1 s |
| Agentic coding session | 60,000 / 4,000 | $0.017 | – | 41.4 s |
| Structured extraction | 2,000 / 200 | $0.0006 | – | 9.0 s |
More from OpenAI
See also
Questions people ask
- Why does GPT-5.6 Luna Pro have no BenchLeader Index score?
- The index needs at least five independent results across at least two categories; as of 25 Oct 2026 GPT-5.6 Luna Pro has 0 that count. Launch-post scores are never used, so it is ranked once independent publishers have measured it.
- How much does GPT-5.6 Luna Pro cost per 1M tokens?
- As of 25 Oct 2026, GPT-5.6 Luna Pro costs $0.200 per 1M input tokens and $1.20 per 1M output tokens, $0.450 blended (three input tokens per output token).
Data as of 25 Oct 2026. Compare with another model.
Cite as: BenchLeader, “GPT-5.6 Luna Pro: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/gpt-5-6-luna-pro.