five models · live—openai-sdk compatible · $5 minimum top-up · no subscription
GPT API, without the full-price bill.
›↵
$0.375 in · $2.25 out / 1m tokens the same openai sdk shape, lower token rates, and no monthly subscription.
models · 5 active · usd / 1m tokensupdated may 12, 2026
model
input
cached
output
ctx
best for
5.4 minigpt-5.4-miniBest value for everyday chat, study tools, bots, and light production use.
400k
everyday apps
5.3 sparkgpt-5.3-codex-sparkFast coding-oriented model for automations and developer workflows.
400k
coding agents
5.3 codexgpt-5.3-codexMost capable agentic coding model for Codex and similar environments.
400k
agentic coding
gpt-5.4gpt-5.4Balanced model for higher quality answers without jumping to the top tier.
1.05M
balanced quality
gpt-5.5gpt-5.5Highest quality option for demanding prompts and important outputs.
1.05M
hard prompts
cached input billed at 1/10x when prefixes repeatlong-context tiers apply past threshold on selected models
quickstart · the openai client, pointed elsewhere
01 · install
# any openai-compatible client works
$ npm install openai
$ export REALROUTER_KEY=sk_rr_•••
02 · call
import OpenAI from "openai"
const client = new OpenAI({
baseURL: "https://api.realrouter.com/v1",
apiKey: process.env.REALROUTER_KEY,
})
const r = await client.responses.create({
model: "gpt-5.4-mini",
input: "plan my week",
})
↳ same shapes for chat.completions, responses, streaming, tools, vision.full docs → capabilities · what the api supports
✓streaming
semantic sse events, on by default
✓function calling
tools, structured outputs
✓vision
image inputs on supported models
✓web search
fresh context on demand
✓cached input
1/10× on repeated prefixes
✓mobile
companion app, same balance
may 8
models
gpt-5.5 added to the catalogue
→
may 4
platform
companion mobile app · same key, same balance
→
apr 30
billing
cached input billing live · repeated prefixes at 1/10 cost
→
apr 22
api
streaming defaulted to semantic sse events
→
apr 10
billing
starter $5 top-up live · stripe checkout
→