gemini-2.5-flash-preview-09-2025 vs Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible))
Both have similar output pricing, while Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible)) offers a larger context window. Choose gemini-2.5-flash-preview-09-2025 or Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible)) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | gemini-2.5-flash-preview-09-2025 | Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible)) |
|---|---|---|
| Provider | 302.AI | LLM Gateway |
| Input / 1M tokens | $0.30 | $1.25 |
| Output / 1M tokens | $2.50 | $2.50 |
| Context window | 1M | 2M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Sep 2025 | Mar 2026 |
| LMArena (Chatbot Arena) Elo score | 1406 | — |
| LMArena Vision Elo score | 1253 | — |
gemini-2.5-flash-preview-09-2025 details →Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible)) details →
FAQ
Is gemini-2.5-flash-preview-09-2025 or Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible)) cheaper?
gemini-2.5-flash-preview-09-2025 and Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible)) have comparable output pricing.
Which has the larger context window, gemini-2.5-flash-preview-09-2025 or Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible))?
Grok 4.20 Reasoning (Vertex AI (OpenAI-compatible)) has the larger context window (2M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.