GPT-6 Astra vs Grok 4.6
GPT-6 Astra (OpenAI) and Grok 4.6 (xAI) compared on benchmarks, pricing, context window, and use-case rankings.
- GPT-6 Astra leads on overall intelligence (ECI 169 vs 157).
- Grok 4.6 is cheaper on input tokens: $2.00 vs $10.00 per 1M.
- GPT-6 Astra has a larger context window (1.1M vs 500K tokens).
- GPT-6 Astra ranks higher for coding (92nd vs 85th percentile).
| Attribute | GPT-6 Astra | Grok 4.6 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 169 | 157 |
| Coding | 92 | 85 |
| Math | 87 | 81 |
| Reasoning & Knowledge | 98 | 67 |
| Agentic & Tools | 86 | 88 |
| Specifications | ||
| Developer | OpenAI | xAI |
| Family | GPT | Grok |
| Released | Sep 3, 2026 | Aug 12, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 1.1M | 500K |
| Price — $/M input | $10.00 | $2.00 |
| Price — $/M output | $50.00 | $6.00 |
| Inputs | file, image, text | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 99% |
| APEX | 65% | 65% |
| ARC-AGI | 99% | 88% |
| ARC-AGI-2 | 95% | 67% |
| GPQA Diamond | 96% | 94% |
| GSO (code optimization) | 79% | — |
| Humanity's Last Exam | 55% | 43% |
| SciCode | 56% | 56% |
| SimpleQA Verified | 76% | 49% |
| WebDev Arena | 1800 | 1618 |
| WeirdML | 94% | 67% |
| SimpleBench | — | 76% |
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.
Frequently asked questions
Is GPT-6 Astra better than Grok 4.6?
On Epoch AI's Capabilities Index, GPT-6 Astra scores higher (169) than Grok 4.6 (157). The right pick depends on your task, so compare their coding, math, and reasoning scores in the table above.
Which is cheaper, GPT-6 Astra or Grok 4.6?
Grok 4.6 is cheaper on input tokens at $2.00 per million, versus $10.00 (representative OpenRouter pricing).
Which has a larger context window, GPT-6 Astra or Grok 4.6?
GPT-6 Astra supports up to 1.1M tokens, compared with 500K for the other.
Which is better for coding, GPT-6 Astra or Grok 4.6?
GPT-6 Astra ranks higher across coding benchmarks like WebDev Arena and SciCode: 92nd vs 85th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.