Gemini 3.5 Flash vs Grok 4.20 Multi-Agent Beta
google/gemini-3.5-flash · x-ai/grok-4.20-multi-agent-beta
As of October 31, 2026, Gemini 3.5 Flash is the cheaper API on UberLLM: $0.0615 per million input tokens and $0.3690 per million output, versus $0.6394 / $1.28 for Grok 4.20 Multi-Agent Beta, about 74% less when output is 3 tokens for every input token. These are the median prices buyers paid over the last 24 hours. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose Gemini 3.5 Flash to cut cost; choose Grok 4.20 Multi-Agent Beta when context size wins. Grok 4.20 Multi-Agent Beta carries the larger context window (2,000,000 vs 1,000,000 tokens), which can matter for long-document work.
Gemini 3.5 Flash vs Grok 4.20 Multi-Agent Beta, side by side
| Spec | Gemini 3.5 Flash | Grok 4.20 Multi-Agent Beta |
|---|---|---|
| Price · input / 1M | $0.0615 | $0.6394 |
| Price · output / 1M | $0.3690 | $1.28 |
| Context length | 1,000,000 | 2,000,000 |
| Max output tokens | 65,536 | 128,000 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | — |
| Vision (image input) | Yes | Yes |
| Reasoning | — | Yes |
| % off list | 96% off | 49% off |
Median prices buyers paid on UberLLM over the last 24 hours. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated October 31, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Gemini 3.5 Flash vs Grok 4.20 Multi-Agent Beta — FAQ
Is Gemini 3.5 Flash or Grok 4.20 Multi-Agent Beta cheaper?
Gemini 3.5 Flash is cheaper on a blended token mix, by about 74%. 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 Gemini 3.5 Flash and Grok 4.20 Multi-Agent Beta?
Gemini 3.5 Flash: $0.0615 in / $0.3690 out per 1M tokens. Grok 4.20 Multi-Agent Beta: $0.6394 in / $1.28 out per 1M tokens. That's roughly a 74% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Gemini 3.5 Flash and Grok 4.20 Multi-Agent 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.