Compare · ModelsLive · 2 picked · head to head
GPT-5.5 Pro vs Kimi K3
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.5 Pro wins on 1/1 benchmarks
GPT-5.5 Pro wins 1 of 1 shared benchmarks. Leads in knowledge.
Category leads
knowledge·GPT-5.5 Pro
Hype vs Reality
Attention vs performance
GPT-5.5 Pro
#1 by perf·#4 by attention
Kimi K3
#51 by perf·#17 by attention
Best value
Kimi K3
8.8x better value than GPT-5.5 Pro
GPT-5.5 Pro
0.8 pts/$
$105.00/M
Kimi K3
7.4 pts/$
$8.10/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
Moonshot AI
$18.0B·Tier 1
Head to head
1 benchmark · 2 models
GPT-5.5 ProKimi K3
GPQA diamond
GPT-5.5 Pro leads by +3.4
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 Pro
94.2
Kimi K3
90.8
Full benchmark table
| Benchmark | GPT-5.5 Pro | Kimi K3 |
|---|---|---|
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 94.2 | 90.8 |
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 | |
| $2.70 | $13.50 | 1.0M tokens (~524 books) | $54.00 |