Compare · ModelsLive · 2 picked · head to head
Gemini 3.5 Flash vs GPT-5.5
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
Gemini 3.5 Flash
#44 by perf·no signal
GPT-5.5
#2 by perf·no signal
Best value
Gemini 3.5 Flash
2.5x better value than GPT-5.5
Gemini 3.5 Flash
11.9 pts/$
$5.25/M
GPT-5.5
4.9 pts/$
$17.50/M
Vendor risk
Who is behind the model
Google DeepMind
$4.00T·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
2 benchmarks · 2 models
Gemini 3.5 FlashGPT-5.5
ARC-AGI
GPT-5.5 leads by +2.5
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Gemini 3.5 Flash
92.5
GPT-5.5
95.0
GPQA diamond
GPT-5.5 leads by +3.2
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Gemini 3.5 Flash
90.4
GPT-5.5
93.6
Full benchmark table
| Benchmark | Gemini 3.5 Flash | GPT-5.5 |
|---|---|---|
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 92.5 | 95.0 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 90.4 | 93.6 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $1.50 | $9.00 | 1.0M tokens (~524 books) | $33.75 | |
| $5.00 | $30.00 | 400K tokens (~200 books) | $112.50 |