Claude Sonnet 5.5 vs Claude Sonnet 5: Release Comparison
Comparison of the Claude Sonnet 5.5 and Claude Sonnet 5 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, Claude Sonnet 5.5 scores highest: Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) at 56, against Claude Sonnet 5 (Adaptive Reasoning, Max Effort) at 38 for Claude Sonnet 5.
- For output speed, Claude Sonnet 5.5 is fastest: Claude Sonnet 5.5 (Adaptive Reasoning, Xhigh Effort, Default Fallback) at 171 t/s, against Claude Sonnet 5 (Adaptive Reasoning, Max Effort) at 77 t/s for Claude Sonnet 5.
- For cost per task, Claude Sonnet 5.5 is cheapest: Claude Sonnet 5.5 (Adaptive Reasoning, Low Effort, Default Fallback) at $0.41, against Claude Sonnet 5 (Adaptive Reasoning, Low Effort) at $0.51 for Claude Sonnet 5.
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 | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) |  Anthropic | 56 | 57 | 60 | 56 | - | 58 | 61 | $7.60 | $1.5 | $2.00 | $10.00 | $0.20 | $8,977 | 193k | 142k | 411M | - | - | - | - | - | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |   | |
| Claude Sonnet 5.5 (Adaptive Reasoning, Xhigh Effort, Default Fallback) | Anthropic | 52 | 52 | 56 | 52 | - | 54 | 56 | $2.74 | $1.5 | $2.00 | $10.00 | $0.20 | $2,738 | 74k | 48k | 104M | 171 | 135.07s | 135.07s | 138.00s | 329.29s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5.5 (Adaptive Reasoning, High Effort, Default Fallback) | Anthropic | 47 | 47 | 52 | 49 | - | 48 | 52 | $1.08 | $1.5 | $2.00 | $10.00 | $0.20 | $1,176 | 34k | 18k | 50M | 97 | 10.97s | 10.97s | 16.12s | 187.78s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) | Anthropic | 41 | 41 | 45 | 44 | - | 42 | 47 | $0.59 | $1.5 | $2.00 | $10.00 | $0.20 | $701 | 19k | 8k | 29M | 115 | 3.79s | 3.79s | 8.16s | 108.81s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, Max Effort) | Anthropic | 38 | 40 | 39 | 42 | 43 | 40 | 49 | $5.09 | $1.5 | $2.00 | $10.00 | $0.20 | $6,998 | 118k | 88k | 367M | 77 | 171.16s | 171.16s | 177.68s | 934.62s | - | 1M | Jun 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |  | |
| Claude Sonnet 5.5 (Adaptive Reasoning, Low Effort, Default Fallback) | Anthropic | 36 | 37 | 41 | 40 | - | 38 | 44 | $0.41 | $1.5 | $2.00 | $10.00 | $0.20 | $544 | 14k | 5k | 23M | 93 | 1.17s | 1.17s | 6.57s | 95.30s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, Xhigh Effort) | Anthropic | 34 | 37 | 37 | 38 | - | 35 | 45 | $2.87 | $1.5 | $2.00 | $10.00 | $0.20 | $3,255 | 65k | 44k | 135M | 69 | 13.42s | 13.42s | 20.66s | 606.01s | - | 1M | Jun 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, High Effort) | Anthropic | 32 | 33 | 33 | 35 | - | 32 | 41 | $1.79 | $1.5 | $2.00 | $10.00 | $0.20 | $2,086 | 44k | 28k | 89M | 66 | 4.37s | 4.37s | 11.97s | 403.11s | - | 1M | Jun 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, Medium Effort) | Anthropic | 28 | 30 | 30 | 32 | - | 29 | 38 | $1.00 | $1.5 | $2.00 | $10.00 | $0.20 | $1,218 | 27k | 15k | 51M | 56 | 1.50s | 1.50s | 10.36s | 280.35s | - | 1M | Jun 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Adaptive Reasoning, Low Effort) | Anthropic | 24 | 26 | 26 | 28 | - | 25 | 33 | $0.51 | $1.5 | $2.00 | $10.00 | $0.20 | $653 | 15k | 7k | 25M | 56 | 1.14s | 1.14s | 10.07s | 156.49s | - | 1M | Jun 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Sonnet 5 (Non-reasoning, High Effort) | Anthropic | 23 | - | - | - | - | - | - | - | $1.5 | $2.00 | $10.00 | $0.20 | - | - | - | - | 65 | 1.01s | 1.01s | 8.67s | - | - | 1M | Jun 2026 | - | No | Supports: text and image | Supports: text | Not available | - | | |