Muse Spark 1.3 vs GPT-5.6 Luna: Release Comparison
Comparison of the Muse Spark 1.3 and GPT-5.6 Luna releases: 2 and 6 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 8 models.
- For intelligence, Muse Spark 1.3 scores highest: Muse Spark 1.3 (max) at 48, against GPT-5.6 Luna (max) at 37 for GPT-5.6 Luna.
- For output speed, Muse Spark 1.3 is fastest: Muse Spark 1.3 (xhigh) at 246 t/s, against GPT-5.6 Luna (max) at 143 t/s for GPT-5.6 Luna.
- For cost per task, GPT-5.6 Luna is cheapest: GPT-5.6 Luna (low) at $0.01, against Muse Spark 1.3 (xhigh) at $1.37 for Muse Spark 1.3.
Releases compared
Intelligence
Artificial Analysis Intelligence Index
Intelligence Index vs. Cost per Intelligence Index Task
Cost per Task (USD, Log Scale)
Cost
Cost per Intelligence Index Task
Speed & Latency
Output Speed
Capability Scores
Capability Indexes
Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, Humanity's Last Exam, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better
Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better
Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, Humanity's Last Exam, AA-LCR v1.1, GDP.pdf, AutomationBench-AA · Higher is better
Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, MLCR-AA, Humanity's Last Exam, AutomationBench-AA · Higher is better
Incorporates 6 evaluations: AA-Omniscience, Humanity's Last Exam, CritPt, GDPval-AA v2.1, AA-Briefcase v1.1, Terminal-Bench 4.0 · Higher is better
Incorporates 5 evaluations: AA-Omniscience, Humanity's Last Exam, GDPval-AA v2.1, AA-Briefcase v1.1, AA-LCR v1.1 · Higher is better
Further details
Input modality | Output modality | Weights | Provider Benchmarks | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muse Spark 1.3 (max) |  Meta | 48 | 50 | 51 | 51 | 50 | 49 | 56 | $1.60 | $0.8 | $1.25 | $4.25 | $0.15 | $2,000 | 60k | 34k | 168M | 221 | 20.98s | 30.01s | 32.27s | 273.31s | - | 1M | Sep 2026 | - | Yes | Supports: text, image, and video | Supports: text | Not available | - | | |
| Muse Spark 1.3 (xhigh) | Meta | 45 | 48 | 49 | 49 | - | 46 | 55 | $1.37 | $0.8 | $1.25 | $4.25 | $0.15 | $1,655 | 55k | 33k | 137M | 246 | 23.47s | 31.60s | 33.63s | 226.81s | - | 1M | Sep 2026 | - | Yes | Supports: text, image, and video | Supports: text | Not available | - | | |
| GPT-5.6 Luna (max) |  OpenAI | 37 | 40 | 44 | 37 | 36 | 36 | 43 | $0.18 | $0.2 | $0.20 | $1.20 | $0.02 | $320 | 41k | 28k | 154M | 143 | 115.79s | 115.79s | 119.28s | 288.22s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |  | |
| GPT-5.6 Luna (xhigh) | OpenAI | 35 | 37 | 41 | 35 | 33 | 34 | 41 | $0.09 | $0.2 | $0.20 | $1.20 | $0.02 | $179 | 24k | 15k | 85M | 129 | 40.24s | 40.24s | 44.11s | 181.53s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |  | |
| GPT-5.6 Luna (high) | OpenAI | 32 | 34 | 37 | 33 | 30 | 32 | 38 | $0.04 | $0.2 | $0.20 | $1.20 | $0.02 | $108 | 14k | 7k | 50M | 130 | 15.15s | 15.15s | 18.99s | 105.62s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Luna (medium) | OpenAI | 25 | 27 | 28 | 28 | 24 | 26 | 32 | $0.02 | $0.2 | $0.20 | $1.20 | $0.02 | $44 | 4k | 2k | 18M | 128 | 2.61s | 2.61s | 6.51s | 34.35s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Luna (low) | OpenAI | 21 | 23 | 22 | 24 | 20 | 23 | 28 | $0.01 | $0.2 | $0.20 | $1.20 | $0.02 | $27 | 3k | 559 | 10M | 131 | 1.63s | 1.63s | 5.46s | 19.27s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Luna (Non-reasoning) | OpenAI | 16 | 16 | 15 | 17 | - | 18 | 22 | $0.01 | $0.2 | $0.20 | $1.20 | $0.02 | $23 | 2k | 0 | 5M | 134 | 0.82s | 0.82s | 4.57s | 15.13s | - | 1M | Jul 2026 | - | No | Supports: text and image | Supports: text | Not available | - | | |