GPT-5.6 Luna vs Gemma 4 31B: Release Comparison
Comparison of the GPT-5.6 Luna and Gemma 4 31B releases: 6 and 2 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 8 models.
- For intelligence, GPT-5.6 Luna scores highest: GPT-5.6 Luna (max) at 38, against Gemma 4 31B (Reasoning) at 15 for Gemma 4 31B.
- For output speed, GPT-5.6 Luna is fastest: GPT-5.6 Luna (xhigh) at 118 t/s, against Gemma 4 31B (Non-reasoning) at 45 t/s for Gemma 4 31B.
Releases compared
Intelligence
Artificial Analysis Intelligence Index
Intelligence Index vs. Cost per Intelligence Index Task
Cost
Cost per Intelligence Index Task
Speed & Latency
Output Speed
Capability Scores
Capability Indices
Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2, AA-Briefcase, Humanity's Last Exam, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better
Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2, AA-Briefcase, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better
Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2, AA-Briefcase, Humanity's Last Exam, AA-LCR v1.1, GDP.pdf, AutomationBench-AA · Higher is better
Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2, AA-Briefcase, MLCR-AA, Humanity's Last Exam, AutomationBench-AA · Higher is better
Incorporates 6 evaluations: AA-Omniscience, Humanity's Last Exam, CritPt, GDPval-AA v2, AA-Briefcase, Terminal-Bench 4.0 · Higher is better
Incorporates 5 evaluations: AA-Omniscience, Humanity's Last Exam, GDPval-AA v2, AA-Briefcase, AA-LCR v1.1 · Higher is better
Further details
Input modality | Output modality | Weights | Provider Benchmarks | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5.6 Luna (max) |  OpenAI | 38 | - | - | - | - | 36 | 43 | $0.18 | $0.2 | $0.20 | $1.20 | $0.02 | $320 | 41k | 28k | 154M | 115 | 128.28s | 128.28s | 132.63s | 364.90s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |  | |
| GPT-5.6 Luna (xhigh) | OpenAI | 35 | 38 | 41 | 35 | 33 | 34 | 41 | $0.09 | $0.2 | $0.20 | $1.20 | $0.02 | $179 | 24k | 15k | 85M | 118 | 43.95s | 43.95s | 48.20s | 200.27s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |  | |
| GPT-5.6 Luna (high) | OpenAI | 32 | 35 | 37 | 33 | 30 | 32 | 38 | $0.04 | $0.2 | $0.20 | $1.20 | $0.02 | $108 | 14k | 7k | 50M | 109 | 8.87s | 8.87s | 13.43s | 133.23s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Luna (medium) | OpenAI | 25 | 27 | 29 | 28 | 25 | 27 | 32 | $0.02 | $0.2 | $0.20 | $1.20 | $0.02 | $44 | 4k | 2k | 18M | 112 | 2.22s | 2.22s | 6.67s | 39.50s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Luna (low) | OpenAI | 22 | 24 | 23 | 25 | 21 | 23 | 29 | $0.01 | $0.2 | $0.20 | $1.20 | $0.02 | $27 | 3k | 559 | 10M | 100 | 2.19s | 2.19s | 7.17s | 24.66s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Luna (Non-reasoning) | OpenAI | 16 | 17 | 15 | 18 | - | 19 | 22 | $0.01 | $0.2 | $0.20 | $1.20 | $0.02 | $23 | 2k | 0 | 5M | 109 | 0.83s | 0.83s | 5.42s | 18.57s | - | 1M | Jul 2026 | - | No | Supports: text and image | Supports: text | Not available | - | | |
| Gemma 4 31B (Reasoning) |  Google | 15 | 15 | 11 | 15 | - | 17 | 22 | $0.00 | $0.0 | $0.00 | $0.00 | - | $0 | 13k | 8k | 49M | 35 | 1.01s | 50.72s | 65.04s | 345.28s | 30.7B | 256k | Apr 2026 | - | Yes | Supports: text, image, and video | Supports: text |    +11 | |||
| Gemma 4 31B (Non-reasoning) | Google | 14 | - | - | - | - | - | - | - | $0.2 | $0.14 | $0.40 | $0.14 | - | - | - | - | 45 | 1.95s | 1.95s | 13.17s | - | 30.7B | 256k | Apr 2026 | - | No | Supports: text, image, and video | Supports: text |   +8 | |||