AI model comparison
GPT-6 Luna Pro vs GPT-6 Luna
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
OpenAI
GPT-6 Luna Pro
GPT-6 Luna Pro is the same underlying model as [GPT-6 Luna](https://openrouter.ai/openai/gpt-6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.
- Input / 1M
- $0.10
- Output / 1M
- $0.50
- Context
- 1.05M
OpenAI
GPT-6 Luna
GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol.
- Input / 1M
- $0.10
- Output / 1M
- $0.50
- Context
- 1.05M
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Tie
Same price for a typical chat
Higher intelligence score
Tie
Not enough benchmark data
Larger context window
Tie
1.05M vs 1.05M tokens
Newer release
GPT-6 Luna Pro
Released September 22, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
GPT-6 Luna ProNot availableGPT-6 Luna38.1Coding index
GPT-6 Luna ProNot availableGPT-6 LunaNot availableAgentic index
GPT-6 Luna ProNot availableGPT-6 LunaNot availablePricing
GPT-6 Luna Pro vs GPT-6 Luna API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-6 Luna Pro | GPT-6 Luna |
|---|---|---|
| Input tokensPer 1M tokens | $0.10 | $0.10 |
| Output tokensPer 1M tokens | $0.50 | $0.50 |
| Cached input (read)Per 1M tokens | $0.01 | $0.01 |
| Cache writePer 1M tokens | $0.13 | $0.13 |
| Long-context pricingPer 1M tokens, for very long prompts | $0.20 in / $0.75 out above 272K | $0.20 in / $0.75 out above 272K |
| Web searchPer request | $0.01 | $0.01 |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
GPT-6 Luna Pro$0.45GPT-6 Luna$0.45Coding task
30K in, 4K out
GPT-6 Luna Pro$5$2.30 cachedGPT-6 Luna$5$2.30 cachedLong document summary
150K in, 2K out
GPT-6 Luna Pro$16$2.50 cachedGPT-6 Luna$16$2.50 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | GPT-6 Luna Pro | GPT-6 Luna |
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Max output | 128K tokens | 128K tokens |
| Input types | File, Image, Text | File, Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, None | Max, Extra high, High, Medium, Low, None |
| Default reasoning effort | Medium | Medium |
| Release date | September 22, 2026 | September 22, 2026 |
Features
Supported features
API features available for each model.
| Metric | GPT-6 Luna Pro | GPT-6 Luna |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Not supported | Not supported |
| Stop sequences | Not supported | Not supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Supported | Supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
GPT-6 Luna ProView full model details- GPT-6 Luna Pro vs DeepSeek V4.1 Flash
- GPT-6 Luna Pro vs GLM 5.3 Flash
- GPT-6 Luna Pro vs MiMo-V2.6-Flash
- GPT-6 Luna Pro vs Hy3
- GPT-6 Luna Pro vs GPT-5.6 Luna
- GPT-6 Luna Pro vs Claude Haiku 5.5
- GPT-6 Luna Pro vs Qwen3.8 Flash
- GPT-6 Luna Pro vs GPT-4o-mini
- GPT-6 Luna Pro vs GPT-5 Nano
- GPT-6 Luna Pro vs GPT-4.1 Nano
GPT-6 LunaView full model details- GPT-6 Luna vs DeepSeek V4.1 Flash
- GPT-6 Luna vs GLM 5.3 Flash
- GPT-6 Luna vs MiMo-V2.6-Flash
- GPT-6 Luna vs Hy4 preview
- GPT-6 Luna vs DeepSeek V4 Flash 0731
- GPT-6 Luna vs Claude Opus 5.5
- GPT-6 Luna vs GLM 5.3
- GPT-6 Luna vs DeepSeek V4 Flash 0423
- GPT-6 Luna vs Step 5 Preview
- GPT-6 Luna vs Gemini 3.8 Flash
- GPT-6 Luna vs Hy3
- GPT-6 Luna vs GPT-5.6 Luna
- GPT-6 Luna vs GPT-6.1 Sol
- GPT-6 Luna vs Muse Spark 1.3 Contributor
- GPT-6 Luna vs Claude Sonnet 5.5
- GPT-6 Luna vs MiMo-V2.6-Pro
- GPT-6 Luna vs DeepSeek V4 Pro 0813
- GPT-6 Luna vs GPT-6 Astra
- GPT-6 Luna vs Claude Opus 5
- GPT-6 Luna vs Claude Fable 5.1
- GPT-6 Luna vs DeepSeek V4 Pro 0423
- GPT-6 Luna vs Solar Pro 4
- GPT-6 Luna vs Claude Haiku 5.5
- GPT-6 Luna vs Ling 3.1 Flash
- GPT-6 Luna vs Qwen3.8 Flash
- GPT-6 Luna vs Qwen3.7 Flash
- GPT-6 Luna vs DeepSeek V4 Flash Vision Exp
- GPT-6 Luna vs GLM 5.3 FlashX
- GPT-6 Luna vs GPT-5.6 Luna Pro
FAQ
Frequently asked questions
Is GPT-6 Luna Pro or GPT-6 Luna cheaper?
GPT-6 Luna Pro and GPT-6 Luna cost the same for a typical chat (2K input tokens and 500 output tokens). GPT-6 Luna Pro costs $0.10 per 1M input tokens and $0.50 per 1M output tokens, and GPT-6 Luna costs $0.10 per 1M input tokens and $0.50 per 1M output tokens.
Which has a bigger context window, GPT-6 Luna Pro or GPT-6 Luna?
GPT-6 Luna Pro supports up to 1.05M tokens of context, compared with 1.05M for GPT-6 Luna.
Can I use GPT-6 Luna Pro and GPT-6 Luna at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GPT-6 Luna Pro and GPT-6 Luna answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GPT-6 Luna Pro and GPT-6 Luna at the same time. Compare the answers side by side and keep the best one.