GPT-6.1 Sol vs GPT-5.6 Terra: Release Comparison
Comparison of the GPT-6.1 Sol and GPT-5.6 Terra releases: 5 and 6 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 11 models.
- For intelligence, GPT-6.1 Sol scores highest: GPT-6.1 Sol (max) at 52, against GPT-5.6 Terra (max) at 42 for GPT-5.6 Terra.
- For output speed, GPT-5.6 Terra is fastest: GPT-5.6 Terra (max) at 98 t/s, against GPT-6.1 Sol (low) at 74 t/s for GPT-6.1 Sol.
- For cost per task, GPT-6.1 Sol is cheapest: GPT-6.1 Sol (low) at $0.13, against GPT-5.6 Terra (Non-reasoning) at $0.14 for GPT-5.6 Terra.
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-6.1 Sol (max) |  OpenAI | 52 | 54 | 57 | 58 | - | 54 | 59 | $0.72 | $1.5 | $2.00 | $10.00 | $0.10 | $1,082 | 38k | 25k | 67M | 67 | 267.64s | 267.64s | 275.12s | 568.66s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6.1 Sol (xhigh) | OpenAI | 51 | 53 | 56 | 57 | - | 53 | 58 | $0.39 | $1.5 | $2.00 | $10.00 | $0.10 | $662 | 18k | 9k | 36M | 64 | 68.65s | 68.65s | 76.51s | 271.10s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6.1 Sol (high) | OpenAI | 50 | 53 | 55 | 56 | - | 52 | 58 | $0.32 | $1.5 | $2.00 | $10.00 | $0.10 | $521 | 13k | 6k | 25M | 66 | 57.26s | 57.26s | 64.81s | 202.65s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6.1 Sol (medium) | OpenAI | 48 | 50 | 53 | 54 | - | 50 | 56 | $0.21 | $1.5 | $2.00 | $10.00 | $0.10 | $361 | 8k | 3k | 15M | 62 | 5.29s | 5.29s | 13.36s | 126.91s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-6.1 Sol (low) | OpenAI | 42 | 45 | 46 | 50 | - | 44 | 52 | $0.13 | $1.5 | $2.00 | $10.00 | $0.10 | $250 | 4k | 1k | 9M | 74 | 1.84s | 1.84s | 8.56s | 54.07s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Terra (max) | OpenAI | 42 | 41 | 47 | 41 | 40 | 43 | 45 | $1.40 | $1.7 | $2.00 | $12.00 | $0.20 | $2,501 | 39k | 26k | 122M | 98 | 139.35s | 139.35s | 144.44s | 398.17s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |  | |
| GPT-5.6 Terra (xhigh) | OpenAI | 38 | 40 | 44 | 40 | 38 | 38 | 44 | $0.63 | $1.7 | $2.00 | $12.00 | $0.20 | $1,187 | 20k | 12k | 52M | 83 | 24.87s | 24.87s | 30.89s | 241.94s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |  | |
| GPT-5.6 Terra (high) | OpenAI | 34 | 37 | 40 | 37 | 34 | 34 | 42 | $0.34 | $1.7 | $2.00 | $12.00 | $0.20 | $768 | 11k | 5k | 33M | 86 | 2.68s | 2.68s | 8.52s | 130.77s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Terra (medium) | OpenAI | 30 | 32 | 34 | 34 | 31 | 31 | 37 | $0.18 | $1.7 | $2.00 | $12.00 | $0.20 | $447 | 5k | 2k | 17M | 80 | 1.74s | 1.74s | 7.98s | 67.75s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Terra (low) | OpenAI | 27 | 30 | 31 | 31 | 27 | 28 | 34 | $0.14 | $1.7 | $2.00 | $12.00 | $0.20 | $350 | 4k | 1k | 11M | 77 | 1.81s | 1.81s | 8.26s | 48.90s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| GPT-5.6 Terra (Non-reasoning) | OpenAI | 21 | 21 | 23 | 22 | - | 21 | 24 | $0.14 | $1.7 | $2.00 | $12.00 | $0.20 | $256 | 3k | 0 | 6M | 85 | 0.78s | 0.78s | 6.66s | 36.68s | - | 1M | Jul 2026 | - | No | Supports: text and image | Supports: text | Not available | - | | |