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GPT-5.6 Luna
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Tool use · Reasoning
Overview
Pricing
Evaluations
Evaluation overview
Overall rank
#41
82.4 points · 212 models
Coding rank
#34
85.5 points · 192 models
Data coverage
56 items
8 sources · updated through 2026-09-02
Domain performance
Coding
#34 / 192
85.5
Research
#55 / 206
82.9
Agents
#38 / 159
78.5
Vision
#45 / 92
76.8
Long context
#27 / 98
86.4
Evaluation highlights
All evaluations
Arena Text Rating
Reasoning · Arena.ai Text · xHigh mode
1,452.57Elo
50
/ 375
Arena Agent Bash Recovery
Agents · Arena.ai Agent · xHigh mode
11.3%
8
/ 52
Terminal Bench 2.1 (Terminus-2)
Coding · Google Gemini 3.6 Flash Official Release Evaluation
84.7%
8
/ 36
Arena Vision Rating
Multimodal · Arena.ai Vision · xHigh mode
1,253.52Elo
32
/ 133
Arena Document Rating
Long context · Arena.ai Document · xHigh mode
1,462.3Elo
14
/ 33
CyberGym
Cybersecurity · OpenAI GPT-5.6 Release
77.9%
15
/ 31
Basic information
Context (input / output)
1.05M / 128K
Release date
2026-07
Input modalities
Text · Image
Output modalities
Text
Family
GPT-5.6
Exact release date
2026-07-09
API model ID
gpt-5.6-luna
Availability
OpenAI
Full pricing
Input
$0.2 /1M
Output
$1.2 /1M
Related links
Official site
Version relationships
GPT-5.6 family
GPT-5.6 Luna
Current
2026-07 · Current model
GPT-5.6 Sol
2026-07 · Same series
GPT-5.6 Terra
2026-07 · Same series
Provider variants
xHigh / Codex Harness
Runtime modes
xHigh