Model comparison
GPT-5.4 Pro vs Kimi K2 Thinking Turbo
GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 45.8 on the Noometry Index.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. GPT-5.4 Pro scores higher in 4 categories and Kimi K2 Thinking Turbo in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.4 Pro leads 70.7 to 32.5.
- The biggest single-benchmark swing is Chess Puzzles: 58.6% for GPT-5.4 Pro and 20% for Kimi K2 Thinking Turbo.
- Kimi K2 Thinking Turbo has downloadable open weights; the other is API-only.
Side by side
| GPT-5.4 Pro | Kimi K2 Thinking Turbo | |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Noometry Index | 58.9 | 45.8 |
| Released | 2026-03-05 | 2025-11-06 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 16 | 21 |
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Category by category
Coding GPT-5.4 Pro leads
GPT-5.4 Pro: 43.2 (#90), Kimi K2 Thinking Turbo: 38.4 (#178)
| Benchmark | GPT-5.4 Pro | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena WebDev | — | 1322 |
| WeirdML | 57.4% | — |
| LMArena Coding | — | 1454 |
Reasoning GPT-5.4 Pro leads
GPT-5.4 Pro: 70.7 (#13), Kimi K2 Thinking Turbo: 32.5 (#75)
| Benchmark | GPT-5.4 Pro | Kimi K2 Thinking Turbo |
|---|---|---|
| Chess Puzzles | 58.6% | 20% |
| ARC-AGI-2 | 83.3% | — |
| SimpleBench | 74.1% | — |
| ARC-AGI-1 | 94.5% | — |
| CritPt | 30% | — |
| EnigmaEval | 23.8% | — |
| LMArena Hard Prompts | — | 1428 |
| Epoch Capabilities Index | 158.93 | — |
Math GPT-5.4 Pro leads
GPT-5.4 Pro: 72.4 (#22), Kimi K2 Thinking Turbo: 47.4 (#68)
| Benchmark | GPT-5.4 Pro | Kimi K2 Thinking Turbo |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | — |
| FrontierMath Tier 4 | 58.5% | — |
| OTIS Mock AIME 2024-2025 | — | 83.1% |
| LMArena Math | — | 1429 |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |
Knowledge GPT-5.4 Pro leads
GPT-5.4 Pro: 68.3 (#7), Kimi K2 Thinking Turbo: 50.9 (#69)
| Benchmark | GPT-5.4 Pro | Kimi K2 Thinking Turbo |
|---|---|---|
| GPQA Diamond | 94.6% | 84.2% |
| Humanity's Last Exam | 44.3% | — |
| SimpleQA Verified | 46.3% | — |
| Vectara Hallucination Rate | 8.3% | — |
| LMArena Expert | — | 1439 |
Multilingual Not comparable
GPT-5.4 Pro: —, Kimi K2 Thinking Turbo: 51.4 (#109)
| Benchmark | GPT-5.4 Pro | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Non-English | — | 1398 |
| LMArena Chinese | — | 1456 |
| LMArena French | — | 1425 |
| LMArena German | — | 1390 |
| LMArena Japanese | — | 1357 |
| LMArena Korean | — | 1330 |
| LMArena Russian | — | 1391 |
| LMArena Spanish | — | 1406 |
Instruction Following Not comparable
GPT-5.4 Pro: —, Kimi K2 Thinking Turbo: 74.0 (#109)
| Benchmark | GPT-5.4 Pro | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Instruction Following | — | 1403 |
Long Context Not comparable
GPT-5.4 Pro: —, Kimi K2 Thinking Turbo: 43.2 (#102)
| Benchmark | GPT-5.4 Pro | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Longer Query | — | 1415 |
Writing & Preference Not comparable
GPT-5.4 Pro: —, Kimi K2 Thinking Turbo: 60.0 (#104)
| Benchmark | GPT-5.4 Pro | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Text | — | 1415 |
| LMArena Creative Writing | — | 1374 |
| LMArena Multi-Turn | — | 1414 |
Frequently asked questions
Is GPT-5.4 Pro better than Kimi K2 Thinking Turbo?
GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 45.8 on the Noometry Index.
Is GPT-5.4 Pro or Kimi K2 Thinking Turbo better for coding?
GPT-5.4 Pro scores higher on coding benchmarks: 43.2 versus 38.4 in the Noometry coding category.
How many benchmarks do GPT-5.4 Pro and Kimi K2 Thinking Turbo share?
2 benchmarks have published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and Kimi K2 Thinking Turbo has 21.