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GPT-5.6 Terra vs Grok 4.6
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| Attribute | GPT-5.6 Terra | Grok 4.6 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 159 | 156 |
| Coding | 73 | 86 |
| Math | 90 | 87 |
| Reasoning & Knowledge | 67 | 69 |
| Agentic & Tools | 61 | 91 |
| Specifications | ||
| Developer | OpenAI | xAI |
| Family | GPT | Grok |
| Released | Jul 9, 2026 | Aug 12, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 1.1M | 500K |
| Price — $/M input | $2.00 | $2.00 |
| Price — $/M output | $12.00 | $6.00 |
| Inputs | file, image, text | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 99% |
| APEX | 58% | 65% |
| ARC-AGI | 97% | 88% |
| ARC-AGI-2 | 84% | 67% |
| GPQA Diamond | 93% | 94% |
| Humanity's Last Exam | 43% | 43% |
| SciCode | 55% | 56% |
| SimpleBench | 49% | 76% |
| SimpleQA Verified | 43% | 49% |
| WebDev Arena | 1521 | 1618 |
| WeirdML | 78% | 67% |
| τ²-bench | 86% | — |
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.