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Claude Opus 5 (batch) vs Grok 4.5
Claude Opus 5 (batch) (—) and Grok 4.5 (xAI) compared on benchmarks, pricing, context window, and use-case rankings.
- Grok 4.5 is cheaper on input tokens — $2.00 vs $2.50 per 1M.
- Claude Opus 5 (batch) has a larger context window (1M vs 500K tokens).
| Attribute | Claude Opus 5 (batch) | Grok 4.5 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | — | 154 |
| Coding | — | 91 |
| Math | — | 85 |
| Reasoning & Knowledge | — | 70 |
| Agentic & Tools | — | 76 |
| Specifications | ||
| Developer | — | xAI |
| Family | Claude | Grok |
| Released | Jul 24, 2026 | Jul 8, 2026 |
| Parameters | — | — |
| Availability | — | API access |
| Context window | 1M | 500K |
| Price — $/M input | $2.50 | $2.00 |
| Price — $/M output | $12.50 | $6.00 |
| Inputs | text, image, file | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | — | 98% |
| APEX | — | 34% |
| ARC-AGI | — | 87% |
| ARC-AGI-2 | — | 53% |
| GPQA Diamond | — | 93% |
| Humanity's Last Exam | — | 40% |
| SciCode | — | 54% |
| SimpleBench | — | 70% |
| SimpleQA Verified | — | 54% |
| WebDev Arena | — | 1551 |
| WeirdML | — | 46% |
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
Which is cheaper, Claude Opus 5 (batch) or Grok 4.5?
Grok 4.5 is cheaper on input tokens at $2.00 per million, versus $2.50 (representative OpenRouter pricing).
Which has a larger context window, Claude Opus 5 (batch) or Grok 4.5?
Claude Opus 5 (batch) supports up to 1M tokens, compared with 500K for the other.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.