Compare · ModelsLive · 2 picked · head to head
GPT-5.5 vs GPT-5.4 Pro
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.5 wins on 2/2 benchmarks
GPT-5.5 wins 2 of 2 shared benchmarks. Leads in reasoning · knowledge.
Category leads
reasoning·GPT-5.5knowledge·GPT-5.5
Hype vs Reality
Attention vs performance
GPT-5.5
#2 by perf·no signal
GPT-5.4 Pro
#26 by perf·no signal
Best value
GPT-5.5
7.6x better value than GPT-5.4 Pro
GPT-5.5
4.9 pts/$
$17.50/M
GPT-5.4 Pro
0.6 pts/$
$105.00/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
2 benchmarks · 2 models
GPT-5.5GPT-5.4 Pro
ARC-AGI
GPT-5.5 leads by +0.5
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
GPT-5.5
95.0
GPT-5.4 Pro
94.5
GPQA diamond
GPT-5.5 leads by +0.8
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
GPT-5.5
93.6
GPT-5.4 Pro
92.8
Full benchmark table
| Benchmark | GPT-5.5 | GPT-5.4 Pro |
|---|---|---|
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 95.0 | 94.5 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 93.6 | 92.8 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $5.00 | $30.00 | 400K tokens (~200 books) | $112.50 | |
| $30.00 | $180.00 | 1.1M tokens (~525 books) | $675.00 |