Compare · ModelsLive · 2 picked · head to head
GPT-5.5 vs GPT-6 Astra
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-6 Astra wins on 2/2 benchmarks
GPT-6 Astra wins 2 of 2 shared benchmarks. Leads in reasoning · knowledge.
Category leads
reasoning·GPT-6 Astraknowledge·GPT-6 Astra
Hype vs Reality
Attention vs performance
GPT-5.5
#2 by perf·#4 by attention
GPT-6 Astra
#9 by perf·#1 by attention
Best value
GPT-5.5
1.9x better value than GPT-6 Astra
GPT-5.5
4.9 pts/$
$17.50/M
GPT-6 Astra
2.6 pts/$
$30.00/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-6 Astra
ARC-AGI
GPT-6 Astra leads by +3.5
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-6 Astra
98.5
GPQA diamond
GPT-6 Astra 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-6 Astra
94.4
Full benchmark table
| Benchmark | GPT-5.5 | GPT-6 Astra |
|---|---|---|
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 95.0 | 98.5 |
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 | 94.4 |
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 | |
| $10.00 | $50.00 | 1.1M tokens (~525 books) | $200.00 |