GPT-5.6 Luna vs Grok 4.3: Release Comparison
Comparison of the GPT-5.6 Luna and Grok 4.3 releases: 6 and 4 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 10 models.
- For intelligence, GPT-5.6 Luna scores highest: GPT-5.6 Luna (max) at 38, against Grok 4.3 (high) at 25 for Grok 4.3.
- For output speed, Grok 4.3 is fastest: Grok 4.3 (high) at 119 t/s, against GPT-5.6 Luna (xhigh) at 118 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 Grok 4.3 (Non-reasoning) at $0.14 for Grok 4.3.
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 v4.0 · 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
Weights | Provider Benchmarks | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| GPT-5.6 Luna (max) |  OpenAI | 38 | - | 1M | $0.2 | 117 | Not available |  | |
| GPT-5.6 Luna (xhigh) | OpenAI | 35 | - | 1M | $0.2 | 118 | Not available |  | |
| GPT-5.6 Luna (high) | OpenAI | 32 | - | 1M | $0.2 | 102 | Not available | | |
| GPT-5.6 Luna (medium) | OpenAI | 25 | - | 1M | $0.2 | 105 | Not available | | |
| Grok 4.3 (high) |  SpaceXAI | 25 | - | 1M | $0.6 | 119 | Not available | | |
| Grok 4.3 (medium) | SpaceXAI | 25 | - | 1M | $0.6 | 118 | Not available | | |
| Grok 4.3 (low) | SpaceXAI | 24 | - | 1M | $0.6 | 113 | Not available | | |
| GPT-5.6 Luna (low) | OpenAI | 22 | - | 1M | $0.2 | 107 | Not available | | |
| GPT-5.6 Luna (Non-reasoning) | OpenAI | 17 | - | 1M | $0.2 | 98 | Not available | | |
| Grok 4.3 (Non-reasoning) | SpaceXAI | 15 | - | 1M | $0.6 | 118 | Not available | |