GPT-6 Luna vs GPT-5.6 Sol: Release Comparison
Comparison of the GPT-6 Luna and GPT-5.6 Sol releases: 6 and 6 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 12 models.
- For intelligence, GPT-5.6 Sol scores highest: GPT-5.6 Sol (max) at 47, against GPT-6 Luna (max) at 37 for GPT-6 Luna.
- For output speed, GPT-6 Luna is fastest: GPT-6 Luna (max) at 157 t/s, against GPT-5.6 Sol (max) at 73 t/s for GPT-5.6 Sol.
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 | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GPT-5.6 Sol (max) |  OpenAI | 47 | 49 | 54 | 50 | 45 | 49 | 53 | $1.99 | $3.1 | $4.00 | $20.00 | $0.40 | $3,465 | 29k | 17k | 90M | 73 | 130.17s | 130.17s | 137.05s | 398.87s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |   | |
| GPT-5.6 Sol (xhigh) | OpenAI | 44 | 47 | 52 | 49 | 43 | 45 | 51 | $1.18 | $3.1 | $4.00 | $20.00 | $0.40 | $2,082 | 20k | 10k | 51M | 69 | 35.55s | 35.55s | 42.81s | 287.80s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Sol (high) | OpenAI | 42 | 46 | 51 | 47 | 42 | 43 | 50 | $0.81 | $3.1 | $4.00 | $20.00 | $0.40 | $1,487 | 13k | 6k | 34M | 64 | 17.49s | 17.49s | 25.28s | 204.81s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Sol (medium) | OpenAI | 39 | 43 | 48 | 45 | 39 | 40 | 48 | $0.50 | $3.1 | $4.00 | $20.00 | $0.40 | $997 | 8k | 3k | 21M | 58 | 5.07s | 5.07s | 13.67s | 133.74s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6 Luna (max) | OpenAI | 37 | 39 | 45 | 39 | - | 37 | 45 | - | $0.1 | $0.10 | $0.50 | $0.01 | - | 51k | 39k | 145M | 157 | 152.68s | 152.68s | 155.86s | 318.47s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6 Luna (xhigh) | OpenAI | 34 | 37 | 42 | 37 | - | 33 | 41 | - | $0.1 | $0.10 | $0.50 | $0.01 | - | 27k | 19k | 68M | 153 | 28.52s | 28.52s | 31.80s | 208.46s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Sol (low) | OpenAI | 33 | 38 | 42 | 42 | 36 | 34 | 44 | $0.26 | $3.1 | $4.00 | $20.00 | $0.40 | $637 | 4k | 837 | 13M | 58 | 3.71s | 3.71s | 12.31s | 68.60s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6 Luna (high) | OpenAI | 32 | 36 | 41 | 35 | - | 32 | 40 | - | $0.1 | $0.10 | $0.50 | $0.01 | - | 20k | 13k | 47M | 127 | 6.69s | 6.69s | 10.62s | 153.17s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6 Luna (medium) | OpenAI | 29 | 32 | 37 | 33 | - | 29 | 37 | - | $0.1 | $0.10 | $0.50 | $0.01 | - | 11k | 6k | 28M | 143 | 5.28s | 5.28s | 8.78s | 79.51s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Sol (Non-reasoning) | OpenAI | 28 | 29 | 32 | 31 | - | - | 32 | - | $3.1 | $4.00 | $20.00 | $0.40 | - | - | - | - | 64 | 1.22s | 1.22s | 9.08s | - | - | 1M | Jul 2026 | - | No | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6 Luna (low) | OpenAI | 21 | 24 | 22 | 25 | - | 23 | 30 | - | $0.1 | $0.10 | $0.50 | $0.01 | - | 2k | 515 | 8M | 152 | 1.59s | 1.59s | 4.89s | 13.89s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6 Luna (Non-reasoning) | OpenAI | 18 | 20 | 20 | 19 | - | 21 | 24 | - | $0.1 | $0.10 | $0.50 | $0.01 | - | 4k | 0 | 7M | 131 | 0.74s | 0.74s | 4.57s | 28.01s | - | 1M | Sep 2026 | - | No | Supports: text and image | Supports: text | Not available | - | | |