GPT-5.6 Luna Pro
openai/gpt-5.6-luna-pro- OpenAI
- Family · GPT-5 Luna Pro
- File · Image · Text → Text
- Reasoning · adjustable
- Tools · JSON · Vision
Not on OSMEXO yet
Spec & list price
Context1M
Max output128K
Input / 1M$0.20
Output / 1M$1.206× input
Usage
Tokens / day8.3B▼ 18% 7d
Usage rank#94
Requests / day163.5K
Tool calls / req0.24
Per request · 30 days
Avg input61.9K4.2× median
Avg output2.1K3.1× median
Cache hit69%about median
Reasoning share50%0.9× median
Tool-call failures0.4%0.2× median
Consumption
Peak 30.6B 28 SepLow 6.9B 17 OctRank today #94
News & trends
News · latest from OpenAI
- GPT-6.1 Terra vs. Claude Opus 5.5: Cheaper and faster in three tests at maxthenewstack.io · 2 Nov
- Chinese labs now target OpenAI's GPT-6 Astra for distillationfork.zone · 1 Nov
- GPT-6.1 Terrasimonwillison.net · 31 Oct
- GPT-5.6 Sol can beat Factorio on peaceful moderyanmadden.net · 31 Oct
Speed
Output speed#43/334117 tok/s1.8× faster than median
Fastest provider168 tok/sbest of 4 providers
First token#32612 s11.1× longer than median
Technical details
- Reasoning
- on · medium
- Tokenizer
- GPT
- Knowledge cutoff
- 2026-02-16
- Moderation
- moderated
Reasoning effort
- max
- xhigh
- high
- medium · default
- low
- none
Request parameters 11
- tools
- tool_choice
- response_format
- structured_outputs
- reasoning
- reasoning_effort
- include_reasoning
- max_tokens
- max_completion_tokens
- seed
+1 more
- verbosity
When to use
Best for
- Harder reasoning at maximum effort
- Long document analysis with images
- Coding and analysis needing more depth
- Tool-calling workflows with structured output
Think twice for
- High-volume simple chat (cheaper options exist)
- Latency-critical interactive apps
- Self-hosting (closed weights)
Same family
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