Grok 4.20 Beta vs Claude Sonnet 4.6
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | Grok 4.20 Beta | Claude Sonnet 4.6 |
|---|---|---|
| Provider | xAI | Anthropic |
| Input Price (1M) | $1.25 | $3.00 |
| Output Price (1M) | $2.50 | $15.00 |
| Context Window | 1,000,000 | 1,000,000 |
Verdict
Grok 4.20 Beta costs $1.25 per 1M input tokens and $2.50 per 1M output tokens. Claude Sonnet 4.6 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens. Grok 4.20 Beta is 58% cheaper on input tokens than Claude Sonnet 4.6. For output tokens, Grok 4.20 Beta is the more affordable option at $2.50/1M vs $15.00.
On context window, Grok 4.20 Beta supports 1,000,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose Grok 4.20 Beta
- ✓ You need the lowest input token cost ($ 1.25/1M)
- ✓ Your workload is output-heavy — Grok 4.20 Beta generates text cheaper
- ✓ You are already integrated with xAI
When to choose Claude Sonnet 4.6
- ✓ You are already integrated with Anthropic
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 Grok 4.20 Beta cheaper than Claude Sonnet 4.6? ▼
Grok 4.20 Beta is cheaper on input tokens at $1.25/1M vs $3.00/1M for Claude Sonnet 4.6 — a 58% saving.
What is the context window of Grok 4.20 Beta vs Claude Sonnet 4.6? ▼
Grok 4.20 Beta has a 1,000,000-token context window. Claude Sonnet 4.6 has a 1,000,000-token context window. Grok 4.20 Beta supports the larger context, suitable for longer documents and agentic workflows.
Which model is better: Grok 4.20 Beta or Claude Sonnet 4.6? ▼
The best choice depends on your use case. For cost efficiency on input tokens, Grok 4.20 Beta is the cheaper option. For maximum context length, Grok 4.20 Beta supports 1,000,000 tokens. Use the comparison table above to find the right fit for your workload.