Model decision surface
Compare AI models
Start with GPT-5.6 Luna and o3 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-5.6 Luna vs o3 Pro
Live dataset updated 8/17/2026, 11:13:20 PM UTC
Open 1200×630 evidence receipt| Field | GPT-5.6 Luna OpenAI | o3 Pro OpenAI |
|---|---|---|
| ModelCap position | #17 | #54 |
| Index score | 68.0 | 46.5 |
| Evidence | Measured6 public benchmark observations across 6 boards | Measured1 public benchmark observation across 1 board |
| Input / 1M | $0.20 | $20.00 |
| Output / 1M | $1.20 | $80.00 |
| Pricing status | fresh | fresh |
| Context | 1M | 200K |
| Providers | 3 | 1 |
| Weight access | API only | API only |
Decision facts
- GPT-5.6 Luna is #17; o3 Pro is #54 on the same current language board.
- Index scores are 68.0 for GPT-5.6 Luna and 46.5 for o3 Pro.
- Both positions use Measured evidence.
- Listed output price per 1M tokens is $1.20 for GPT-5.6 Luna and $80.00 for o3 Pro.
- Published context is 1,050,000 tokens for GPT-5.6 Luna and 200,000 for o3 Pro.
- ModelCap currently lists 3 providers for GPT-5.6 Luna and 1 for o3 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.