Claude Sonnet 5 vs Grok 4.3
anthropic/claude-sonnet-5 · x-ai/grok-4.3
As of November 8, 2026, Grok 4.3 is the cheaper API on UberLLM: $0.0124 per million input tokens and $0.0248 per million output, versus $0.0816 / $0.4080 for Claude Sonnet 5, about 93% 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 Grok 4.3 to cut cost; choose Claude Sonnet 5 when its capabilities fit your task better.
Claude Sonnet 5 vs Grok 4.3, side by side
| Spec | Claude Sonnet 5 | Grok 4.3 |
|---|---|---|
| Price · input / 1M | $0.0816 | $0.0124 |
| Price · output / 1M | $0.4080 | $0.0248 |
| Context length | 1,000,000 | 1,000,000 |
| 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 | 95.9% off | 99% off |
| First token, median (7 days) | 3.2 s (3,415 requests) | — |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 8, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Claude Sonnet 5 vs Grok 4.3 — FAQ
Is Claude Sonnet 5 or Grok 4.3 cheaper?
Grok 4.3 is cheaper on a blended token mix, by about 93%. 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 5 and Grok 4.3?
Claude Sonnet 5: $0.0816 in / $0.4080 out per 1M tokens. Grok 4.3: $0.0124 in / $0.0248 out per 1M tokens. That's roughly a 93% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 5 and Grok 4.3 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.