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Start with GPT-5.1-Codex-Max and Sonar Reasoning 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
GPT-5.1-Codex-Max vs Sonar Reasoning Pro
Live dataset updated 8/19/2026, 2:25:16 AM UTC
Open 1200×630 evidence receipt| Field | GPT-5.1-Codex-Max OpenAI | Sonar Reasoning Pro Perplexity |
|---|---|---|
| ModelCap position | #113 | #110 |
| Index score | 22.1 | 22.3 |
| Evidence | Estimatedpublisher corpus prior · leave-one-anchor-out calibrated | Measured1 public benchmark observation across 1 board |
| Input / 1M | $1.25 | $2.00 |
| Output / 1M | $10.00 | $8.00 |
| Pricing status | fresh | fresh |
| Context | 400K | 128K |
| Providers | 1 | 1 |
| Weight access | API only | API only |
Decision facts
- GPT-5.1-Codex-Max is #113; Sonar Reasoning Pro is #110 on the same current language board.
- Index scores are 22.1 for GPT-5.1-Codex-Max and 22.3 for Sonar Reasoning Pro.
- Evidence differs: GPT-5.1-Codex-Max is Estimated; Sonar Reasoning Pro is Measured.
- Listed output price per 1M tokens is $10.00 for GPT-5.1-Codex-Max and $8.00 for Sonar Reasoning Pro.
- Published context is 400,000 tokens for GPT-5.1-Codex-Max and 128,000 for Sonar Reasoning 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.