Compare · ModelsLive · 2 picked · head to head
GPT-5.5 Pro vs Kimi K3.1 Pro
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.5 Pro wins on 6/8 benchmarks
GPT-5.5 Pro wins 6 of 8 shared benchmarks. Leads in knowledge · general · math.
Category leads
knowledge·GPT-5.5 Progeneral·GPT-5.5 Promath·GPT-5.5 Pro
Hype vs Reality
Attention vs performance
GPT-5.5 Pro
#8 by perf·#9 by attention
Kimi K3.1 Pro
#37 by perf·#15 by attention
Best value
Kimi K3.1 Pro
15.1x better value than GPT-5.5 Pro
GPT-5.5 Pro
0.7 pts/$
$105.00/M
Kimi K3.1 Pro
11.0 pts/$
$6.00/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
Moonshot AI
$50.0B·Tier 1
Head to head
8 benchmarks · 2 models
GPT-5.5 ProKimi K3.1 Pro
Chess Puzzles
GPT-5.5 Pro leads by +17.9
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
GPT-5.5 Pro
60.0
Kimi K3.1 Pro
42.1
Dtbench
GPT-5.5 Pro leads by +4.5
GPT-5.5 Pro
93.3
Kimi K3.1 Pro
88.9
FrontierMath-Tier-4-v2-Private
GPT-5.5 Pro leads by +12.2
GPT-5.5 Pro
78.0
Kimi K3.1 Pro
65.8
FrontierMath-Tiers-1-3-v2-Private
GPT-5.5 Pro leads by +10.0
GPT-5.5 Pro
92.3
Kimi K3.1 Pro
82.4
GPQA diamond
Kimi K3.1 Pro leads by +0.4
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
95.7
Kimi K3.1 Pro
96.1
Lmca
Kimi K3.1 Pro leads by +4.3
GPT-5.5 Pro
63.5
Kimi K3.1 Pro
67.8
OTIS Mock AIME 2024-2025
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
GPT-5.5 Pro
100.0
Kimi K3.1 Pro
100.0
SimpleQA Verified
GPT-5.5 Pro leads by +2.3
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
GPT-5.5 Pro
64.5
Kimi K3.1 Pro
62.2
Full benchmark table
| Benchmark | GPT-5.5 Pro | Kimi K3.1 Pro |
|---|---|---|
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 60.0 | 42.1 |
Dtbench | 93.3 | 88.9 |
FrontierMath-Tier-4-v2-Private | 78.0 | 65.8 |
FrontierMath-Tiers-1-3-v2-Private | 92.3 | 82.4 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 95.7 | 96.1 |
Lmca | 63.5 | 67.8 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 100.0 | 100.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 64.5 | 62.2 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $30.00 | $180.00 | 1.1M tokens (~525 books) | $675.00 | |
| $2.00 | $10.00 | 1.0M tokens (~524 books) | $40.00 |