Claude Opus 4.1 vs Grok Build 0.1
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| Provider | Anthropic | xAI |
| Input Price (1M) | $15.00 | $1.00 |
| Output Price (1M) | $75.00 | $2.00 |
| Context Window | 200,000 | 256,000 |
Verdict
Claude Opus 4.1 costs $15.00 per 1M input tokens and $75.00 per 1M output tokens. Grok Build 0.1 costs $1.00 per 1M input tokens and $2.00 per 1M output tokens. Grok Build 0.1 is 93% cheaper on input tokens than Claude Opus 4.1. For output tokens, Grok Build 0.1 is the more affordable option at $2.00/1M vs $75.00.
On context window, Grok Build 0.1 supports 256,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose Claude Opus 4.1
- ✓ You are already integrated with Anthropic
When to choose Grok Build 0.1
- ✓ You need the lowest input token cost ($ 1.00/1M)
- ✓ Your workload is output-heavy — Grok Build 0.1 generates text cheaper
- ✓ You need a larger context window (256,000 tokens)
- ✓ You are already integrated with xAI
Use the calculator above to simulate your specific workload and find the exact break-even point. For most applications, the cheapest model is the one that minimises your total monthly bill given your input-to-output token ratio.
Frequently Asked Questions
Is Claude Opus 4.1 cheaper than Grok Build 0.1? ▼
Grok Build 0.1 is cheaper on input tokens at $1.00/1M vs $15.00/1M for Claude Opus 4.1 — a 93% saving.
What is the context window of Claude Opus 4.1 vs Grok Build 0.1? ▼
Claude Opus 4.1 has a 200,000-token context window. Grok Build 0.1 has a 256,000-token context window. Grok Build 0.1 supports the larger context, suitable for longer documents and agentic workflows.
Which model is better: Claude Opus 4.1 or Grok Build 0.1? ▼
The best choice depends on your use case. For cost efficiency on input tokens, Grok Build 0.1 is the cheaper option. For maximum context length, Grok Build 0.1 supports 256,000 tokens. Use the comparison table above to find the right fit for your workload.