Claude Opus 4.5 (latest) vs xAI Grok 4
30-second takeaway
- xAI Grok 4 has the cheaper input: $3 vs $5 (per 1M tokens, 40% less)
- xAI Grok 4 has the larger context: 256K vs 200K tokens
| Claude Opus 4.5 (latest) Anthropic | xAI Grok 4 Helicone | |
|---|---|---|
| Input | $5 | $3 |
| Output | $25 | $15 |
| Context | 200K | 256K |
More specs (max output / capabilities)
| max output | 64,000 | 256,000 |
| Reasoning | ✓ Yes | — No |
| Tool calls | ✓ Yes | ✓ Yes |
| Open weights | — No | — No |
Prices are official/data-source rates (per 1M tokens), not what relays actually charge — relay prices vary with discounts and group multipliers. See methodology.