GPT-5.6 Luna vs Claude Sonnet 5: Release Comparison
Comparison of the GPT-5.6 Luna and Claude Sonnet 5 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 Luna and Claude Sonnet 5 tie at 38 (GPT-5.6 Luna (max) and Claude Sonnet 5 (Adaptive Reasoning, Max Effort)).
- For output speed, GPT-5.6 Luna is fastest: GPT-5.6 Luna (xhigh) at 117 t/s, against Claude Sonnet 5 (Adaptive Reasoning, Max Effort) at 84 t/s for Claude Sonnet 5.
- For cost per task, GPT-5.6 Luna is cheapest: GPT-5.6 Luna (low) at $0.01, against Claude Sonnet 5 (Adaptive Reasoning, Low Effort) at $0.51 for Claude Sonnet 5.
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 | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Sonnet 5 (Adaptive Reasoning, Max Effort) |  Anthropic | 38 | 41 | 40 | 43 | 43 | 40 | 50 | $5.09 | $1.5 | $2.00 | $10.00 | $0.20 | $6,998 | 118k | 88k | 367M | 84 | 195.83s | 195.83s | 201.79s | 877.37s | - | 1M | Jun 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |    | |
| GPT-5.6 Luna (max) |  OpenAI | 38 | - | - | - | - | 36 | 43 | $0.18 | $0.2 | $0.20 | $1.20 | $0.02 | $320 | 41k | 28k | 154M | 115 | 124.21s | 124.21s | 128.56s | 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 | 117 | 45.03s | 45.03s | 49.32s | 201.94s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, Xhigh Effort) | Anthropic | 35 | 38 | 37 | 39 | - | 36 | 46 | $2.87 | $1.5 | $2.00 | $10.00 | $0.20 | $3,255 | 65k | 44k | 135M | 62 | 22.30s | 22.30s | 30.37s | 672.64s | - | 1M | Jun 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 | 8.74s | 8.74s | 13.31s | 133.23s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, High Effort) | Anthropic | 32 | 34 | 34 | 35 | - | 32 | 42 | $1.79 | $1.5 | $2.00 | $10.00 | $0.20 | $2,086 | 44k | 28k | 89M | 58 | 3.97s | 3.97s | 12.56s | 460.65s | - | 1M | Jun 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Non-reasoning, High Effort) | Anthropic | 29 | - | - | - | - | - | - | - | $1.5 | $2.00 | $10.00 | $0.20 | - | - | - | - | 58 | 1.08s | 1.08s | 9.72s | - | - | 1M | Jun 2026 | - | No | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, Medium Effort) | Anthropic | 28 | 31 | 31 | 32 | - | 29 | 38 | $1.00 | $1.5 | $2.00 | $10.00 | $0.20 | $1,218 | 27k | 15k | 51M | 57 | 1.66s | 1.66s | 10.50s | 285.97s | - | 1M | Jun 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 | 2.36s | 2.36s | 6.81s | 39.50s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, Low Effort) | Anthropic | 25 | 27 | 27 | 29 | - | 26 | 34 | $0.51 | $1.5 | $2.00 | $10.00 | $0.20 | $653 | 15k | 7k | 25M | 56 | 1.25s | 1.25s | 10.21s | 161.65s | - | 1M | Jun 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 | 98 | 2.19s | 2.19s | 7.26s | 24.92s | - | 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 | 107 | 0.85s | 0.85s | 5.53s | 18.94s | - | 1M | Jul 2026 | - | No | Supports: text and image | Supports: text | Not available | - | | |