Claude Sonnet 5 vs K2-V2: Release Comparison
Comparison of the Claude Sonnet 5 and K2-V2 releases: 6 and 3 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 9 models.
- For intelligence, Claude Sonnet 5 scores highest: Claude Sonnet 5 (Adaptive Reasoning, Max Effort) at 38, against K2-V2 (high) at 10 for K2-V2.
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 | 74 | 146.51s | 146.51s | 153.28s | 958.81s | - | 1M | Jun 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 | 67 | 30.19s | 30.19s | 37.65s | 594.17s | - | 1M | Jun 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 | 64 | 4.10s | 4.10s | 11.87s | 408.76s | - | 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 | - | - | - | - | 66 | 1.39s | 1.39s | 8.93s | - | - | 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 | 64 | 2.08s | 2.08s | 9.93s | 261.70s | - | 1M | Jun 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 | 65 | 1.89s | 1.89s | 9.56s | 145.61s | - | 1M | Jun 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| K2-V2 (high) |  MBZUAI Institute of Foundation Models | 10 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 70B | 512k | Dec 2025 | - | Yes | Supports: text | Supports: text | - | |||
| K2-V2 (medium) | MBZUAI Institute of Foundation Models | 9 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 70B | 512k | Dec 2025 | - | Yes | Supports: text | Supports: text | - | |||
| K2-V2 (low) | MBZUAI Institute of Foundation Models | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 70B | 512k | Dec 2025 | - | Yes | Supports: text | Supports: text | - | |||