$ diff grok-4-6 claude-opus-5
Grok 4.6 vs Claude Opus 5
Values come from Grok 4.6 and Claude Opus 5, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
xAIGrok 4.6
- context
- 500K
- weights
- closed
- $/M in
- $2
- $/M out
- $6
- context
- 1M
- weights
- closed
- $/M in
- $5
- $/M out
- $25
What actually differs
- Context window
- Claude Opus 5 takes 1M against 500K — 2× more room in a single request.
- Input price
- Grok 4.6 at $2/M against $5/M — 2.5× cheaper to feed. Standard rates: one of these labs also quotes a lower cached-input tier, which applies only when a prefix is reused — see the full spec below.
- Output price
- Grok 4.6 at $6/M against $25/M — 4.2× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Recency
- Grok 4.6 shipped 14 days after Claude Opus 5 (2026-08-07 vs 2026-07-24).
Full spec
| Attribute | Grok 4.6 | Claude Opus 5 |
|---|---|---|
| Developer | xAI | Anthropic |
| Released | 2026-08-07 | 2026-07-24 |
| Context window | 500,000 tokens | 1M tokens |
| Pricing | $2/M input · $6/M output; a request reaching 200K tokens re-prices in full at $4.00/M input · $1.00/M cached input · $12.00/M output | $5/M input · $25/M output (standard); $10/M · $50/M (Fast mode, research preview) |
| License | proprietary | proprietary |
| Availability | API | Claude.ai, API (`claude-opus-5`), Bedrock (`anthropic.claude-opus-53`), Vertex AI, Microsoft Foundry, Claude Code, Cowork |