Claude Sonnet 4.6 vs Grok 4.20 Beta
anthropic/claude-sonnet-4.6 · x-ai/grok-4.20-beta
As of November 3, 2026, Claude Sonnet 4.6 is the cheaper API on UberLLM: $0.0034 per million input tokens and $0.0172 per million output, versus $0.1750 / $0.3500 for Grok 4.20 Beta, about 95% less when output is 3 tokens for every input token. These are the best prices on the market right now. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose Claude Sonnet 4.6 to cut cost; choose Grok 4.20 Beta when context size wins. Grok 4.20 Beta carries the larger context window (2,000,000 vs 1,000,000 tokens), which can matter for long-document work.
Claude Sonnet 4.6 vs Grok 4.20 Beta, side by side
| Spec | Claude Sonnet 4.6 | Grok 4.20 Beta |
|---|---|---|
| Price · input / 1M | $0.0034 | $0.1750 |
| Price · output / 1M | $0.0172 | $0.3500 |
| Context length | 1,000,000 | 2,000,000 |
| Max output tokens | 64,000 | 128,000 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 99.9% off | 86% off |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 3, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Claude Sonnet 4.6 vs Grok 4.20 Beta — FAQ
Is Claude Sonnet 4.6 or Grok 4.20 Beta cheaper?
Claude Sonnet 4.6 is cheaper on a blended token mix, by about 95%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between Claude Sonnet 4.6 and Grok 4.20 Beta?
Claude Sonnet 4.6: $0.0034 in / $0.0172 out per 1M tokens. Grok 4.20 Beta: $0.1750 in / $0.3500 out per 1M tokens. That's roughly a 95% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 4.6 and Grok 4.20 Beta with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.