Model comparison
GPT-5.4 Pro vs Kimi K3
GPT-5.4 Pro and Kimi K3 score almost the same on the Noometry Index (58.9 vs 59.5), so choose on price, context window or the category you care about most.
Last verified . 11 shared benchmarks.
Summary
- They share 11 benchmarks with published results for both. GPT-5.4 Pro scores higher in 2 categories and Kimi K3 in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in coding, where Kimi K3 leads 61.0 to 43.2.
- The biggest single-benchmark swing is WeirdML: 57.4% for GPT-5.4 Pro and 82.6% for Kimi K3.
- Kimi K3 is cheaper at $3 / $15 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 1.05M.
- Kimi K3 has downloadable open weights; the other is API-only.
Side by side
| GPT-5.4 Pro | Kimi K3 | |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Noometry Index | 58.9 | 59.5 |
| Released | 2026-03-05 | 2026-07-16 |
| Weights | Proprietary | Open |
| Context window | 1.05M | 1.05M |
| Max output | 128K | 1.05M |
| Input $ / M tokens | $30 | $3 |
| Output $ / M tokens | $180 | $15 |
| Results tracked | 16 | 53 |
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Category by category
Coding Kimi K3 leads
GPT-5.4 Pro: 43.2 (#90), Kimi K3: 61.0 (#10)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| WeirdML | 57.4% | 82.6% |
| DeepSWE | — | 68.5% |
| FrontierCode | — | 44.2% |
| LMArena WebDev | — | 1654 |
| FrontierSWE | — | 25.9% |
| SciCode | — | 59.5% |
| LMArena Coding | — | 1508 |
| ALE-Bench | — | 1,524 |
Agentic & Tool Use Not comparable
GPT-5.4 Pro: —, Kimi K3: 41.8 (#20)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| APEX-Agents | — | 50.6% |
| τ²-bench Banking | — | 37.1% |
| PostTrainBench | — | 32% |
| GBAEval | — | 48.3% |
| GDP.pdf | — | 19% |
| Vending-Bench 2 | — | 5,165 |
Reasoning GPT-5.4 Pro leads
GPT-5.4 Pro: 70.7 (#13), Kimi K3: 63.0 (#17)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| ARC-AGI-2 | 83.3% | 60.4% |
| SimpleBench | 74.1% | 60.7% |
| ARC-AGI-1 | 94.5% | 94.5% |
| CritPt | 30% | 23.4% |
| Chess Puzzles | 58.6% | 39% |
| Epoch Capabilities Index | 158.93 | 157.45 |
| NYT Connections (extended) | — | 93.6% |
| EnigmaEval | 23.8% | — |
| LMArena Hard Prompts | — | 1496 |
| Mystery Game Puzzles | — | 26% |
| DTBench | — | 91.2% |
| LMCA | — | 52.7% |
| Surface Evolver Bench | — | 95% |
| ForecastBench | — | 61.1 |
Math Kimi K3 leads
GPT-5.4 Pro: 72.4 (#22), Kimi K3: 74.2 (#16)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | 72.2% |
| FrontierMath Tier 4 | 58.5% | 39% |
| MathArena Final-Answer Competitions | — | 87.8% |
| OTIS Mock AIME 2024-2025 | — | 97.2% |
| ProofBench | — | 87% |
| LMArena Math | — | 1491 |
| 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 K3: 63.2 (#21)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| GPQA Diamond | 94.6% | 93.1% |
| SimpleQA Verified | 46.3% | 50.6% |
| Humanity's Last Exam | 44.3% | — |
| Vectara Hallucination Rate | 8.3% | — |
| LMArena Expert | — | 1521 |
Multimodal Not comparable
GPT-5.4 Pro: —, Kimi K3: 37.8 (#70)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| Blueprint-Bench 2 | — | 29.5% |
| Furniture Assembly | — | 34.2% |
Multilingual Not comparable
GPT-5.4 Pro: —, Kimi K3: 56.3 (#21)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| LMArena Non-English | — | 1466 |
| LMArena Chinese | — | 1529 |
| LMArena French | — | 1491 |
| LMArena German | — | 1488 |
| LMArena Japanese | — | 1487 |
| LMArena Korean | — | 1458 |
| LMArena Russian | — | 1482 |
| LMArena Spanish | — | 1472 |
Instruction Following Not comparable
GPT-5.4 Pro: —, Kimi K3: 77.7 (#14)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| LMArena Instruction Following | — | 1483 |
Long Context Not comparable
GPT-5.4 Pro: —, Kimi K3: 45.8 (#29)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| LMArena Longer Query | — | 1494 |
Writing & Preference Not comparable
GPT-5.4 Pro: —, Kimi K3: 76.6 (#4)
| Benchmark | GPT-5.4 Pro | Kimi K3 |
|---|---|---|
| LMArena Text | — | 1476 |
| LMArena Creative Writing | — | 1454 |
| EQ-Bench Creative Writing | — | 2082 |
| EQ-Bench 4 | — | 1339 |
| LMArena Multi-Turn | — | 1488 |
Frequently asked questions
Is GPT-5.4 Pro better than Kimi K3?
GPT-5.4 Pro and Kimi K3 score almost the same on the Noometry Index (58.9 vs 59.5), so choose on price, context window or the category you care about most.
Which is cheaper, GPT-5.4 Pro or Kimi K3?
Kimi K3 is cheaper. It lists at $3 per million input tokens and $15 per million output tokens; GPT-5.4 Pro lists at $30 and $180.
Is GPT-5.4 Pro or Kimi K3 better for coding?
Kimi K3 scores higher on coding benchmarks: 61.0 versus 43.2 in the Noometry coding category.
Which has the bigger context window?
GPT-5.4 Pro does, with 1.05M tokens against 1.05M.
How many benchmarks do GPT-5.4 Pro and Kimi K3 share?
11 benchmarks have published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and Kimi K3 has 53.