GPT 5.6 Luna Pro
GPT-5.6 Luna with Pro reasoning mode. Pro mode performs more model work for difficult tasks; reasoning effort remains independently configurable and defaults to medium.
- Reasoning
- Vision
- Native PDF input
- Tool Calling
- Structured Output
Added Jul 9, 2026
Pricing
Auto routing · per 1M tokens- Input
- $0.20
- Output
- $1.20
- Cache read
- $0.020
Specifications
- Context window
- 1.1M
- Max output
- 128K
- Avg output (7d)
- 1.3K tokens
- Longer than 80% of models
Benchmarks
Benchmarks
Sourced from Artificial Analysis.
Intelligence Index
37.3
Coding Index
71.4
Agentic work
AutomationBench-AA
Workflow automation with guardrail penalties
50.2%
Better than 66% of models compared
Harvey LAB-AA
Legal agentic work criterion pass rate
87.9%
Better than 49% of models compared
AA-Briefcase
Agentic knowledge work (Elo)
1343 Elo
Better than 74% of models compared
GDPval-AA v2
Economically valuable tasks (Elo)
1464 Elo
Better than 81% of models compared
Document reasoning
GDP.pdf
Professional PDF reasoning: all-pass rate
24.0%
Better than 82% of models compared
AA-LCR v1.1
Long context reasoning with updated grading
83.7%
Better than 97% of models compared
MLCR-AA
Medical long-context reasoning
19.4%
Better than 65% of models compared
Reasoning
HLE
Humanity's Last Exam
39.5%
Better than 87% of models compared
Coding
Terminal-Bench v4.0
Practical coding and terminal tasks
11.6%
Better than 63% of models compared
SciCode
Python programming for scientific computing
53.6%
Better than 68% of models compared
Legacy benchmarks
GPQA Diamond (legacy)
Graduate-level scientific reasoning
91.1%
Better than 91% of models compared
AA-LCR (unversioned / legacy)
Long context reasoning evaluation
83.7%
Better than 97% of models compared
Last updated Oct 14, 2026
Artificial AnalysisProviders
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