Grok 4.6 vs Kimi K3: Benchmark Comparison
Grok 4.6 has the higher score on 13 of 29 shared benchmarks; Kimi K3 leads on 15.
The largest observed score gap is 36.00 pts on ProofBench v1.1 , where Kimi K3 leads.
Reported ±1 standard-error ranges overlap on 18 of 28 shared benchmarks with comparable uncertainty data. This is not a pairwise statistical significance test.
Shared benchmark results
Scores and reported standard errors come from the latest visible Vals benchmark version available for both models.
| Benchmark | Grok 4.6 | Kimi K3 | Gap | Reported uncertainty |
|---|---|---|---|---|
| Vals Index | 52.09% ±1.15 | 50.30% ±0.99 | 1.80 pts | Reported ±1 SE ranges overlap |
| Vals RSI Index | 25.46% | 20.88% | 4.58 pts | Uncertainty comparison unavailable |
| Harvey's Legal Agent Benchmark | 15.83% ±2.65 | 12.92% ±2.68 | 2.92 pts | Reported ±1 SE ranges overlap |
| Legal Research Bench | 48.08% ±3.47 | 46.15% ±3.46 | 1.92 pts | Reported ±1 SE ranges overlap |
| LegalBench | 86.31% ±0.42 | 86.21% ±0.41 | 0.09 pts | Reported ±1 SE ranges overlap |
| EMB | 62.73% ±3.08 | 66.68% ±2.87 | 3.95 pts | Reported ±1 SE ranges overlap |
| Finance Agent (v2) | 53.68% ±0.67 | 53.11% ±0.37 | 0.57 pts | Reported ±1 SE ranges overlap |
| MortgageTax | 64.19% ±0.95 | 66.34% ±0.91 | 2.15 pts | Reported ±1 SE ranges do not overlap |
| Tax Agent Bench | 70.79% ±3.00 | 68.67% ±3.08 | 2.12 pts | Reported ±1 SE ranges overlap |
| TaxEval v2 | 71.10% ±0.90 | 75.72% ±0.84 | 4.62 pts | Reported ±1 SE ranges do not overlap |
| MedCode | 44.71% ±2.26 | 49.36% ±2.20 | 4.64 pts | Reported ±1 SE ranges do not overlap |
| MedScribe | 86.53% ±1.96 | 88.05% ±1.98 | 1.51 pts | Reported ±1 SE ranges overlap |
| ProofBench v1.1 | 51.00% ±5.02 | 87.00% ±3.38 | 36.00 pts | Reported ±1 SE ranges do not overlap |
| BioMysteryBench | 72.22% ±0.00 | 72.59% ±1.61 | 0.37 pts | Reported ±1 SE ranges overlap |
| Terminal-Bench Science | 11.43% ±3.83 | 1.43% ±1.43 | 10.00 pts | Reported ±1 SE ranges do not overlap |
| GPQA Diamond | 94.70% ±1.13 | 92.93% ±1.31 | 1.77 pts | Reported ±1 SE ranges overlap |
| MMLU Pro | 89.40% ±0.30 | 87.97% ±0.32 | 1.43 pts | Reported ±1 SE ranges do not overlap |
| SAGE | 28.90% ±3.08 | 52.78% ±3.41 | 23.88 pts | Reported ±1 SE ranges do not overlap |
| Code Migration | 44.57% ±4.48 | 16.10% ±4.10 | 28.47 pts | Reported ±1 SE ranges do not overlap |
| IOI | 47.61% ±2.09 | 48.94% ±9.82 | 1.33 pts | Reported ±1 SE ranges overlap |
| LiveCodeBench | 88.22% ±0.94 | 87.19% ±0.97 | 1.04 pts | Reported ±1 SE ranges overlap |
| ProgramBench | 1.00% ±0.70 | 2.00% ±0.99 | 1.00 pts | Reported ±1 SE ranges overlap |
| SWE-bench | 95.60% ±0.92 | 93.40% ±1.11 | 2.20 pts | Reported ±1 SE ranges do not overlap |
| Terminal-Bench 4.0 | 17.17% ±1.34 | 17.17% ±0.51 | 0.00 pts | Reported ±1 SE ranges overlap |
| Vibe Code Bench 1-100 | 14.75% ±3.17 | 18.24% ±3.92 | 3.49 pts | Reported ±1 SE ranges overlap |
| Vibe Code Bench v1.1 | 76.24% ±3.82 | 84.97% ±2.75 | 8.73 pts | Reported ±1 SE ranges do not overlap |
| CyberBench v1.1 | 67.68% ±5.87 | 75.24% ±5.56 | 7.56 pts | Reported ±1 SE ranges overlap |
| Public Benefits Bench v1.1 | 66.85% ±1.23 | 68.20% ±1.21 | 1.35 pts | Reported ±1 SE ranges overlap |
| Time Horizon Index: KSP | 5.83% ±0.00 | 10.50% ±5.38 | 4.67 pts | Reported ±1 SE ranges overlap |
Performance by category
| Category | Grok 4.6 average | Kimi K3 average |
|---|---|---|
| Legal | 50.07% | 48.43% |
| Finance | 64.50% | 66.10% |
| Healthcare | 65.62% | 68.70% |
| Math | 51.00% | 87.00% |
| Science | 41.83% | 37.01% |
| Academic | 92.05% | 90.45% |
| Education | 28.90% | 52.78% |
| Coding | 48.15% | 46.00% |
| Cyber | 67.68% | 75.24% |
| Social Mobility | 66.85% | 68.20% |
Cost and latency
Cost per test appears only where the benchmark reports it for both models. Latency is the measured completion time for that benchmark.
| Benchmark | Grok 4.6 cost | Kimi K3 cost | Grok 4.6 latency | Kimi K3 latency |
|---|---|---|---|---|
| Vals Index | $4.49 | $6.38 | 37m01s | 1h08m |
| Vals RSI Index | $88.12 | $136.82 | 90h00m | 90h00m |
| Harvey's Legal Agent Benchmark | $4.01 | $3.83 | 45m05s | 13m58s |
| Legal Research Bench | $1.53 | $3.47 | 25m04s | 12m40s |
| LegalBench | N/A | N/A | 27.42s | 7.11s |
| EMB | $3.06 | $3.07 | 52m59s | 12m21s |
| Finance Agent (v2) | $1.66 | $1.91 | 16m41s | 4m46s |
| MortgageTax | N/A | N/A | 8.55s | 78.94s |
| Tax Agent Bench | $0.98 | $2.79 | 10m58s | 40m15s |
| TaxEval v2 | N/A | N/A | 47.57s | 2m25s |
| MedCode | N/A | N/A | 2m07s | 36.99s |
| MedScribe | N/A | N/A | 70.94s | 38.24s |
| ProofBench v1.1 | $0.76 | $1.65 | 14m22s | 34m31s |
| BioMysteryBench | $1.23 | $1.06 | 14m18s | 4m55s |
| Terminal-Bench Science | $4.82 | $21.30 | 1h18m | 4h49m |
| GPQA Diamond | N/A | N/A | 3m29s | 2m02s |
| MMLU Pro | N/A | N/A | 54.98s | 38.72s |
| SAGE | N/A | N/A | 3m22s | 47.30s |
| Code Migration | $14.58 | $13.87 | 1h30m | 4h18m |
| IOI | $8.18 | $14.17 | 3h57m | 4h18m |
| LiveCodeBench | N/A | N/A | 118.40s | 3m20s |
| ProgramBench | $16.76 | $70.48 | 4h27m | 5h42m |
| SWE-bench | $0.78 | $0.76 | 10m04s | 10m19s |
| Terminal-Bench 4.0 | $5.07 | $12.02 | 29m27s | 3h09m |
| Vibe Code Bench 1-100 | $26.27 | $9.40 | 2h11m | 1h48m |
| Vibe Code Bench v1.1 | $4.88 | $10.01 | 25m30s | 16m39s |
| CyberBench v1.1 | $4.07 | $2.13 | 36m52s | 30m44s |
| Public Benefits Bench v1.1 | $0.92 | $0.91 | 25m53s | 7m19s |
| Time Horizon Index: KSP | $225.12 | $216.43 | N/A | N/A |
Results available only for Grok 4.6
- MysteryMechanism
- SkillsBench
Results available only for Kimi K3
- MMMU Pro