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Grok 4.5 vs Kimi K2
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| Attribute | Grok 4.5 | Kimi K2 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 154 | 140 |
| Coding | 89 | 7 |
| Math | 84 | 5 |
| Reasoning & Knowledge | 68 | 14 |
| Agentic & Tools | 74 | 18 |
| Specifications | ||
| Developer | xAI | Moonshot |
| Family | Grok | Kimi |
| Released | Jul 8, 2026 | Sep 5, 2025 |
| Parameters | — | 1T |
| Availability | API access | Open weights (restricted use) |
| Context window | 500K | 131K |
| Price — $/M input | $2.00 | $0.57 |
| Price — $/M output | $6.00 | $2.30 |
| Inputs | text, image, file | text |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 98% | 57% |
| APEX | 34% | — |
| ARC-AGI | 87% | — |
| ARC-AGI-2 | 53% | — |
| GPQA Diamond | 93% | 77% |
| Humanity's Last Exam | 40% | 7% |
| SciCode | 54% | 35% |
| SimpleBench | 70% | 26% |
| SimpleQA Verified | 54% | — |
| WebDev Arena | 1551 | — |
| WeirdML | 46% | 39% |
| GSO (code optimization) | — | 5% |
| LiveCodeBench | — | 56% |
| MMLU-Pro | — | 82% |
| Terminal-Bench | — | 28% |
| τ²-bench | — | 61% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.