Compare · ModelsLive · 2 picked · head to head
GPT-5.5 Pro vs o3 Pro
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.5 Pro wins on 0/0 benchmarks
Not enough overlapping benchmarks to declare a winner yet · GPT-5.5 Pro · o3 Pro are still filling in scores.
Hype vs Reality
Attention vs performance
GPT-5.5 Pro
#1 by perf·no signal
o3 Pro
#35 by perf·no signal
Best value
o3 Pro
1.5x better value than GPT-5.5 Pro
GPT-5.5 Pro
0.8 pts/$
$105.00/M
o3 Pro
1.2 pts/$
$50.00/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
OpenAI
$840.0B·Tier 1
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $30.00 | $180.00 | 400K tokens (~200 books) | $675.00 | |
| $20.00 | $80.00 | 200K tokens (~100 books) | $350.00 |