Model decision surface
Compare AI models
Start with Claude Opus 5 and Nex-N2.5-Pro, or choose any two current ranked language models. Compare capability evidence, price, context, provider availability, and weight access without pretending one field decides every use case.
Current public data
Claude Opus 5 vs Nex-N2.5-Pro
Live dataset updated 9/9/2026, 9:50:24 PM UTC
Open 1200×630 evidence receipt| Field | Claude Opus 5 Anthropic | Nex-N2.5-Pro Nex AGI |
|---|---|---|
| ModelCap position | #4 | #18 |
| Index score | 86.8 | 76.7 |
| Evidence | Measured6 public benchmark observations across 6 boards | Estimatedglobal-corpus-prior over 180 held-out anchors (11%); launch card against 8 resolved peers on 8 rows (89%); exceeds every named peer on 1 of 8 rows; optimism haircut 0 from cross-lab-probe; shrunk 2.7 toward the measured corpus |
| Input / 1M | $5.00 | Free |
| Output / 1M | $25.00 | Free |
| Pricing status | fresh | fresh |
| Context | 1M | 262K |
| Providers | 5 | 1 |
| Weight access | API only | Open weights |
Decision facts
- Claude Opus 5 is #4; Nex-N2.5-Pro is #18 on the same current language board.
- Index scores are 86.8 for Claude Opus 5 and 76.7 for Nex-N2.5-Pro. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.
- Evidence differs: Claude Opus 5 is Measured; Nex-N2.5-Pro is Estimated.
- Listed output price per 1M tokens is $25.00 for Claude Opus 5 and $0 for Nex-N2.5-Pro. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $22.50 for Claude Opus 5 versus $0 for Nex-N2.5-Pro. Nex-N2.5-Pro costs 100.0% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.
- Published context is 1,000,000 tokens for Claude Opus 5 and 262,144 for Nex-N2.5-Pro.
- Weight access differs: Claude Opus 5 is none; Nex-N2.5-Pro is open.
- ModelCap currently lists 5 providers for Claude Opus 5 and 1 for Nex-N2.5-Pro.
These are separate published fields, not a synthetic winner. ModelCap does not collapse price, access, context, and capability evidence into a hidden recommendation score.
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Each comparison page is a permanent, shareable URL with the same live figures as this tool: ModelCap Index position, API pricing, context window, provider count, weight access and every shared benchmark board.