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LLM Gateway · OpenAI

GPT-3.5 Turbo API: pricing, context window & how to call it

Provider: OpenAIAvailable via withConfluxtoolsjson16K context

GPT-3.5 Turbo by OpenAI — current API prices and limits, plus how to call it with one withConflux key, one bill across every model.

Get a key → call GPT-3.5 TurboRequest early accessSee all modelsPricing as of 1 Oct 2026 · provider list price
withConflux LLM GATEWAY · OPENAI GPT-3.5 Turbo 16K context tools · json one key · one bill

Pricing

Input
$0.50 /1M
Output
$1.50 /1M
Context
16K tokens

How to call GPT-3.5 Turbo

withConflux is OpenAI-compatible — change only the base URL and key, then pass gpt-3.5-turbo.

// Node — official OpenAI SDK, OpenAI-compatible
import OpenAI from "openai";
const ai = new OpenAI({ baseURL: "https://withconflux.com/v1", apiKey: process.env.CONFLUX_KEY });

const res = await ai.chat.completions.create({
  model: "gpt-3.5-turbo",
  messages: [{ role: "user", content: "Hello" }],
});

Cost example

A request with a 10,000-token prompt and a 2,000-token response on GPT-3.5 Turbo costs about $0.0080 ($0.50/1M in × 10k + $1.50/1M out × 2k). At 100,000 such calls/month that's roughly $800 — the same whether you call OpenAI directly or through withConflux, just on one bill.

GPT-3.5 Turbo vs alternatives

ModelInput /1MOutput /1MContext
GPT-3.5 Turbo$0.50$1.5016K
GPT-6 Astra$20.00$75.001.05M
GPT-5.6 Sol$8.00$30.001.05M
GPT-5.6 Terra$4.00$18.001.05M

Frequently asked questions

How much does the GPT-3.5 Turbo API cost?

$0.50 per 1M input tokens and $1.50 per 1M output tokens (provider list price), as of 1 Oct 2026. withConflux passes provider pricing through on one bill.

What is GPT-3.5 Turbo's context window?

16K tokens.

Can I use the OpenAI SDK with withConflux?

Yes — withConflux is OpenAI-compatible. Change only the base URL and your API key, then pass "gpt-3.5-turbo" as the model.

How do I call GPT-3.5 Turbo?

Send a chat completion to https://withconflux.com/v1 with model "gpt-3.5-turbo" and your withConflux key. See the code example on this page.

Related models

Prices shown as of 1 Oct 2026, sourced from the providers' public pricing — check the provider for the latest. Product and model names are trademarks of their respective owners; withConflux is not affiliated with or endorsed by them.

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