Model comparison
Grok Build 0.1 vs Kimi K3
Kimi K3 is the stronger model overall, scoring 59.5 to 36.4 on the Noometry Index. Grok Build 0.1 costs 4.8× less per token, which makes it the better buy when Kimi K3's lead doesn't matter for your workload.
Last verified . 3 shared benchmarks.
Summary
- They share 3 benchmarks with published results for both. Grok Build 0.1 scores higher in 0 categories and Kimi K3 in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Kimi K3 leads 63.0 to 32.2.
- The biggest single-benchmark swing is GBAEval: 2.4% for Grok Build 0.1 and 48.3% for Kimi K3.
- Grok Build 0.1 is cheaper at $1 / $2 per million input/output tokens, against $3 / $15 for Kimi K3.
- Kimi K3 accepts more context: 1.05M tokens versus 256K.
- Kimi K3 has downloadable open weights; the other is API-only.
Side by side
| Grok Build 0.1 | Kimi K3 | |
|---|---|---|
| Provider | xAI | Moonshot AI |
| Noometry Index | 36.4 | 59.5 |
| Released | 2026-04-16 | 2026-07-16 |
| Weights | Proprietary | Open |
| Context window | 256K | 1.05M |
| Max output | 256K | 1.05M |
| Input $ / M tokens | $1 | $3 |
| Output $ / M tokens | $2 | $15 |
| Results tracked | 3 | 53 |
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Category by category
Coding Kimi K3 leads
Grok Build 0.1: 43.1 (#91), Kimi K3: 61.0 (#10)
| Benchmark | Grok Build 0.1 | Kimi K3 |
|---|---|---|
| SciCode | 50.2% | 59.5% |
| DeepSWE | — | 68.5% |
| FrontierCode | — | 44.2% |
| LMArena WebDev | — | 1654 |
| FrontierSWE | — | 25.9% |
| WeirdML | — | 82.6% |
| LMArena Coding | — | 1508 |
| ALE-Bench | — | 1,524 |
Agentic & Tool Use Kimi K3 leads
Grok Build 0.1: 22.7 (#129), Kimi K3: 41.8 (#20)
| Benchmark | Grok Build 0.1 | Kimi K3 |
|---|---|---|
| GBAEval | 2.4% | 48.3% |
| APEX-Agents | — | 50.6% |
| τ²-bench Banking | — | 37.1% |
| PostTrainBench | — | 32% |
| GDP.pdf | — | 19% |
| Vending-Bench 2 | — | 5,165 |
Reasoning Kimi K3 leads
Grok Build 0.1: 32.2 (#77), Kimi K3: 63.0 (#17)
| Benchmark | Grok Build 0.1 | Kimi K3 |
|---|---|---|
| CritPt | 9.1% | 23.4% |
| ARC-AGI-2 | — | 60.4% |
| SimpleBench | — | 60.7% |
| NYT Connections (extended) | — | 93.6% |
| ARC-AGI-1 | — | 94.5% |
| Chess Puzzles | — | 39% |
| LMArena Hard Prompts | — | 1496 |
| Mystery Game Puzzles | — | 26% |
| DTBench | — | 91.2% |
| LMCA | — | 52.7% |
| Surface Evolver Bench | — | 95% |
| Epoch Capabilities Index | — | 157.45 |
| ForecastBench | — | 61.1 |
Math Not comparable
Grok Build 0.1: —, Kimi K3: 74.2 (#16)
| Benchmark | Grok Build 0.1 | Kimi K3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 72.2% |
| FrontierMath Tier 4 | — | 39% |
| MathArena Final-Answer Competitions | — | 87.8% |
| OTIS Mock AIME 2024-2025 | — | 97.2% |
| ProofBench | — | 87% |
| LMArena Math | — | 1491 |
Knowledge Not comparable
Grok Build 0.1: —, Kimi K3: 63.2 (#21)
| Benchmark | Grok Build 0.1 | Kimi K3 |
|---|---|---|
| GPQA Diamond | — | 93.1% |
| SimpleQA Verified | — | 50.6% |
| LMArena Expert | — | 1521 |
Multimodal Not comparable
Grok Build 0.1: —, Kimi K3: 37.8 (#70)
| Benchmark | Grok Build 0.1 | Kimi K3 |
|---|---|---|
| Blueprint-Bench 2 | — | 29.5% |
| Furniture Assembly | — | 34.2% |
Multilingual Not comparable
Grok Build 0.1: —, Kimi K3: 56.3 (#21)
| Benchmark | Grok Build 0.1 | 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
Grok Build 0.1: —, Kimi K3: 77.7 (#14)
| Benchmark | Grok Build 0.1 | Kimi K3 |
|---|---|---|
| LMArena Instruction Following | — | 1483 |
Long Context Not comparable
Grok Build 0.1: —, Kimi K3: 45.8 (#29)
| Benchmark | Grok Build 0.1 | Kimi K3 |
|---|---|---|
| LMArena Longer Query | — | 1494 |
Writing & Preference Not comparable
Grok Build 0.1: —, Kimi K3: 76.6 (#4)
| Benchmark | Grok Build 0.1 | 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 Grok Build 0.1 better than Kimi K3?
Kimi K3 is the stronger model overall, scoring 59.5 to 36.4 on the Noometry Index. Grok Build 0.1 costs 4.8× less per token, which makes it the better buy when Kimi K3's lead doesn't matter for your workload.
Which is cheaper, Grok Build 0.1 or Kimi K3?
Grok Build 0.1 is cheaper. It lists at $1 per million input tokens and $2 per million output tokens; Kimi K3 lists at $3 and $15.
Is Grok Build 0.1 or Kimi K3 better for coding?
Kimi K3 scores higher on coding benchmarks: 61.0 versus 43.1 in the Noometry coding category.
Which has the bigger context window?
Kimi K3 does, with 1.05M tokens against 256K.
How many benchmarks do Grok Build 0.1 and Kimi K3 share?
3 benchmarks have published results for both models. Grok Build 0.1 has 3 scored results on Noometry and Kimi K3 has 53.