Model decision surface
Compare AI models
Start with GPT-5.5 Pro and o4 Mini, 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-5.5 Pro vs o4 Mini
Live dataset updated 9/22/2026, 9:31:46 PM UTC
Open 1200×630 evidence receipt| Field | GPT-5.5 Pro OpenAI | o4 Mini OpenAI |
|---|---|---|
| ModelCap position | #59 | #106 |
| Index score | 64.3 | 51.6 |
| Evidence | Measuredpublisher-corpus-prior over 208 held-out anchors (59%); 1 specialist-board observation at 2.1% support (41%); shrunk 10.1 toward the measured corpus | Measured3 public benchmark observations across 3 boards |
| Input / 1M | $30.00 | $1.10 |
| Output / 1M | $180 | $4.40 |
| Pricing status | fresh | fresh |
| Context | 1M | 200K |
| Providers | 1 | 1 |
| Weight access | API only | API only |
Decision facts
- GPT-5.5 Pro is #59; o4 Mini is #106 on the same current language board.
- Index scores are 64.3 for GPT-5.5 Pro and 51.6 for o4 Mini. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.
- Both positions use Measured evidence.
- Listed output price per 1M tokens is $180.00 for GPT-5.5 Pro and $4.40 for o4 Mini. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $150.00 for GPT-5.5 Pro versus $4.40 for o4 Mini. o4 Mini costs 97.1% 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 1,050,000 tokens for GPT-5.5 Pro and 200,000 for o4 Mini.
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.