Claude Opus 5.5 vs JT-4.1 Flash 236B A21B: Release Comparison
Comparison of the Claude Opus 5.5 and JT-4.1 Flash 236B A21B releases: 5 and 2 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 7 models.
- For intelligence, Claude Opus 5.5 scores highest: Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) at 58, against JT-4.1 Flash 236B A21B at 34 for JT-4.1 Flash 236B A21B.
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 Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) |  Anthropic | 58 | 61 | 64 | 63 | 61 | 60 | 66 | $5.98 | $2.9 | $4.00 | $20.00 | $0.20 | $8,708 | 119k | 84k | 260M | 92 | 685.45s | 685.45s | 690.87s | 819.48s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Opus 5.5 (Adaptive Reasoning, Xhigh Effort, Default Fallback) | Anthropic | 56 | 58 | 62 | 61 | - | 59 | 63 | $3.46 | $2.9 | $4.00 | $20.00 | $0.20 | $4,057 | 66k | 40k | 100M | 80 | 125.47s | 125.47s | 131.75s | 506.09s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Opus 5.5 (Adaptive Reasoning, High Effort, Default Fallback) | Anthropic | 54 | 56 | 59 | 59 | - | 56 | 61 | $1.82 | $2.9 | $4.00 | $20.00 | $0.20 | $2,172 | 36k | 18k | 53M | 74 | 33.20s | 33.20s | 39.97s | 295.69s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback) | Anthropic | 51 | 54 | 57 | 57 | - | 54 | 60 | $1.34 | $2.9 | $4.00 | $20.00 | $0.20 | $1,627 | 26k | 12k | 38M | 74 | 23.21s | 23.21s | 29.97s | 217.95s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Opus 5.5 (Adaptive Reasoning, Low Effort, Default Fallback) | Anthropic | 42 | 46 | 48 | 52 | - | 45 | 53 | $0.55 | $2.9 | $4.00 | $20.00 | $0.20 | $860 | 10k | 3k | 20M | 73 | 14.25s | 14.25s | 21.14s | 87.08s | - | 1M | Sep 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |   | |
| JT-4.1 Flash 236B A21B |  China Mobile | 34 | 40 | 41 | 44 | - | 36 | 47 | - | - | - | - | - | - | 86k | 54k | 185M | - | - | - | - | - | 236B 21B active at inference time | 262k | Jul 2026 | - | Yes | Supports: text | Supports: text | Not available | - | - | |
| JT-4.1 Flash 236B A21B (non-reasoning) | China Mobile | 27 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 236B 21B active at inference time | 256k | Jul 2026 | - | No | Supports: text and image | Supports: text | Not available | - | - | |