Claude Opus 5 vs Grok 4.6
Claude Opus 5 (Anthropic) and Grok 4.6 (xAI) compared on benchmarks, pricing, context window, and use-case rankings.
- Claude Opus 5 leads on overall intelligence (ECI 162 vs 156).
- Grok 4.6 is cheaper on input tokens — $2.00 vs $5.00 per 1M.
- Claude Opus 5 has a larger context window (1M vs 500K tokens).
- Claude Opus 5 ranks higher for coding (94th vs 92th percentile).
| Attribute | Claude Opus 5 | Grok 4.6 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 162 | 156 |
| Coding | 94 | 92 |
| Math | 90 | 92 |
| Reasoning & Knowledge | 92 | 73 |
| Agentic & Tools | 91 | 85 |
| Specifications | ||
| Developer | Anthropic | xAI |
| Family | Claude | Grok |
| Released | Jul 24, 2026 | Aug 12, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 1M | 500K |
| Price — $/M input | $5.00 | $2.00 |
| Price — $/M output | $25.00 | $6.00 |
| Inputs | text, image, file | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 99% | 99% |
| APEX | 44% | 41% |
| ARC-AGI | 98% | 88% |
| ARC-AGI-2 | 90% | 67% |
| GPQA Diamond | 94% | 94% |
| Humanity's Last Exam | 55% | 43% |
| SciCode | 56% | 56% |
| SimpleBench | 81% | 76% |
| SimpleQA Verified | 60% | 49% |
| WebDev Arena | 1691 | 1629 |
| WeirdML | 92% | 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.
Frequently asked questions
Is Claude Opus 5 better than Grok 4.6?
On Epoch AI's Capabilities Index, Claude Opus 5 scores higher (162) than Grok 4.6 (156). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is cheaper, Claude Opus 5 or Grok 4.6?
Grok 4.6 is cheaper on input tokens at $2.00 per million, versus $5.00 (representative OpenRouter pricing).
Which has a larger context window, Claude Opus 5 or Grok 4.6?
Claude Opus 5 supports up to 1M tokens, compared with 500K for the other.
Which is better for coding, Claude Opus 5 or Grok 4.6?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Claude Opus 5 ranks higher — 94th vs 92th percentile among the models tracked on Model Beat.
Want a different match-up? Open the compare tool to add or swap models.
More comparisons
Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.