Model decision surface
Compare AI models
Start with GPT-5.3-Codex and GPT-5.5 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
GPT-5.3-Codex vs GPT-5.5 Pro
Live dataset updated 8/17/2026, 11:13:20 PM UTC
Open 1200×630 evidence receipt| Field | GPT-5.3-Codex OpenAI | GPT-5.5 Pro OpenAI |
|---|---|---|
| ModelCap position | #20 | #76 |
| Index score | 66.4 | 35.2 |
| Evidence | Measured1 public benchmark observation across 1 board | Measured1 public benchmark observation across 1 board |
| Input / 1M | $1.75 | $30.00 |
| Output / 1M | $14.00 | $180 |
| Pricing status | fresh | fresh |
| Context | 400K | 1M |
| Providers | 2 | 1 |
| Weight access | API only | API only |
Decision facts
- GPT-5.3-Codex is #20; GPT-5.5 Pro is #76 on the same current language board.
- Index scores are 66.4 for GPT-5.3-Codex and 35.2 for GPT-5.5 Pro.
- Both positions use Measured evidence.
- Listed output price per 1M tokens is $14.00 for GPT-5.3-Codex and $180.00 for GPT-5.5 Pro.
- Published context is 400,000 tokens for GPT-5.3-Codex and 1,050,000 for GPT-5.5 Pro.
- ModelCap currently lists 2 providers for GPT-5.3-Codex and 1 for GPT-5.5 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.