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Claude Fable 5 vs Gemini 3.8 Flash High

claude-fable-5-1 · gemini-3.8-flash-high

Both Claude Fable 5 and Gemini 3.8 Flash High are accessible through a single Newton’s API key using standard OpenAI SDKs.

Get API Key for Both Models →Claude Fable 5 SpecsGemini 3.8 Flash High Specs

Side-by-Side API Pricing & Specs

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

MetricAnthropic: Claude Fable 5Google: Gemini 3.8 Flash High
API Model IDclaude-fable-5-1gemini-3.8-flash-high
Provider LabAnthropicGoogle
Gateway StatusCatalogCatalog
Input / 1M tokens——
Cached Input / 1M tokens——
Output / 1M tokens——
Context Window128K+128K+

Real-World Engineering Workload Cost

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

Claude Fable 5 · 10M In + 2M Out—
Gemini 3.8 Flash High · 10M In + 2M Out—
Billing ModelPrepaid · $0 Hard Stop

When to Route to Claude Fable 5 vs Gemini 3.8 Flash High

Because Newton’s exposes both claude-fable-5-1 and gemini-3.8-flash-high behind the same API key and base URL, engineering teams frequently combine both models in the same workflow:

  • Primary Planning & ArchitectureClaude Fable 5 (claude-fable-5-1)
  • High-Volume Execution & VerificationGemini 3.8 Flash High (gemini-3.8-flash-high)
  • 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 Claude Fable 5 and Gemini 3.8 Flash High with 1 line:
const response = await client.chat.completions.create({
  model: "claude-fable-5-1", // or "gemini-3.8-flash-high"
  messages: [{ role: "user", content: "Compare architecture trade-offs." }],
});

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