Gemini 3.5 Flash vs DeepSeek V4 Flash

Side-by-Side API Pricing & Specs

Live per-million-token pricing served through Newton’s unified OpenAI-compatible gateway.

Real-World Engineering Workload Cost

Estimated spend for typical coding and autonomous agent workloads based on published per-token rates:

When to Route to Gemini 3.5 Flash vs DeepSeek V4 Flash

Because Newton’s exposes both gemini-3.5-flash and deepseek-v4-flash behind the same API key and base URL, engineering teams frequently combine both models in the same workflow:

• Primary Planning & ArchitectureGemini 3.5 Flash (gemini-3.5-flash)
• High-Volume Execution & VerificationDeepSeek V4 Flash (deepseek-v4-flash)
• Interactive Cost SimulatorOpen Token Calculator →

Switch Between Both Models With One API Key

Point the official OpenAI SDK, Cursor, or Claude Code at https://newtons.dev/api/v1 and swap the model string on demand:

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.NEWTONS_API_KEY,
  baseURL: "https://newtons.dev/api/v1",
});

// Switch between Gemini 3.5 Flash and DeepSeek V4 Flash with 1 line:
const response = await client.chat.completions.create({
  model: "gemini-3.5-flash", // or "deepseek-v4-flash"
  messages: [{ role: "user", content: "Compare architecture trade-offs." }],
});

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