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Grok 4.6 vs Step 5 Preview
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| Attribute | Grok 4.6 | Step 5 Preview |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 156 | — |
| Coding | 90 | 95 |
| Math | 91 | — |
| Reasoning & Knowledge | 73 | 93 |
| Agentic & Tools | 95 | — |
| Specifications | ||
| Developer | xAI | StepFun |
| Family | Grok | — |
| Released | Aug 12, 2026 | Sep 18, 2026 |
| Parameters | — | 600B |
| Availability | API access | API access |
| Context window | 500K | — |
| Price — $/M input | $2.00 | — |
| Price — $/M output | $6.00 | — |
| Inputs | text, image, file | — |
| Outputs | text | — |
| Benchmarks | ||
| AIME 2024/2025 | 99% | — |
| APEX | 65% | — |
| ARC-AGI | 88% | — |
| ARC-AGI-2 | 67% | — |
| GPQA Diamond | 94% | — |
| Humanity's Last Exam | 43% | 47% |
| SciCode | 56% | 59% |
| SimpleBench | 76% | — |
| SimpleQA Verified | 49% | — |
| WebDev Arena | 1618 | — |
| WeirdML | 67% | — |
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.