Compare · ModelsLive · 2 picked · head to head
DeepSeek V4 Pro 0813 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
DeepSeek V4 Pro 0813
#50 by perf·#10 by attention
GPT-5.5
#2 by perf·#8 by attention
Best value
DeepSeek V4 Pro 0813
9.4x better value than GPT-5.5
DeepSeek V4 Pro 0813
45.5 pts/$
$1.32/M
GPT-5.5
4.9 pts/$
$17.50/M
Vendor risk
Mixed exposure
One or more vendors flagged
DeepSeek
$3.4B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
2 benchmarks · 2 models
DeepSeek V4 Pro 0813GPT-5.5
ARC-AGI
GPT-5.5 leads by +4.5
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
DeepSeek V4 Pro 0813
90.5
GPT-5.5
95.0
GPQA diamond
GPT-5.5 leads by +4.7
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
DeepSeek V4 Pro 0813
88.9
GPT-5.5
93.6
Full benchmark table
| Benchmark | DeepSeek V4 Pro 0813 | 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. | 90.5 | 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. | 88.9 | 93.6 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.66 | $1.98 | 1.0M tokens (~524 books) | $9.90 | |
| $5.00 | $30.00 | 400K tokens (~200 books) | $112.50 |