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Grok 4.20 vs Grok 4.5
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| Attribute | Grok 4.20 | Grok 4.5 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 152 | 154 |
| Coding | 51 | 89 |
| Math | 61 | 84 |
| Reasoning & Knowledge | 56 | 68 |
| Agentic & Tools | 61 | 74 |
| Specifications | ||
| Developer | xAI | xAI |
| Family | Grok | Grok |
| Released | Feb 17, 2026 | Jul 8, 2026 |
| Parameters | 500B | — |
| Availability | API access | API access |
| Context window | 2M | 500K |
| Price — $/M input | $1.25 | $2.00 |
| Price — $/M output | $2.50 | $6.00 |
| Inputs | text, image, file | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 92% | 98% |
| ARC-AGI | 90% | 87% |
| ARC-AGI-2 | 65% | 53% |
| GPQA Diamond | 89% | 93% |
| SimpleQA Verified | 35% | 54% |
| Terminal-Bench | 57% | — |
| WebDev Arena | 1395 | 1551 |
| WeirdML | 52% | 46% |
| APEX | — | 34% |
| Humanity's Last Exam | — | 40% |
| SciCode | — | 54% |
| SimpleBench | — | 70% |
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.