reinforce42 API

Frontier open models served from private NVIDIA DGX hardware. Your prompts never touch a third-party cloud. The API mirrors the OpenAI spec, so any OpenAI SDK works by changing one line — the base URL.

Authentication

Every request needs your API key in the Authorization header as a bearer token. Keys are metered against a prepaid balance; you can view and top up yours in the account portal.

CopyAuthorization: Bearer sk-your-api-key

Quickstart

Send your first chat completion. Reasoning models spend tokens thinking, so set a generous max_tokens.

Copycurl https://api.reinforce42.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-oss-120b",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Models & pricing

Prices are drawn from your credit balance exactly as you use them — no minimums, no rounding.

List available models programmatically:

CopyGET /v1/models

Chat completions

OpenAI-compatible. Supports messages, max_tokens, temperature, top_p, stream, stop, and tool calling.

Copy# streaming
curl https://api.reinforce42.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-api-key" \
  -d '{"model":"gemma3-27b","stream":true,"messages":[{"role":"user","content":"Write a haiku."}]}'

Transcription (speech-to-text)

Turn call recordings and audio into text with whisper-large-v3 — or whisper-large-v3-turbo for faster, near-identical results. Send the audio as multipart form data. Use response_format=json or text.

Copycurl https://api.reinforce42.com/v1/audio/transcriptions \
  -H "Authorization: Bearer sk-your-api-key" \
  -F "file=@call-recording.mp3" \
  -F "model=whisper-large-v3" \
  -F "response_format=json"

Image generation

Text-to-image with flux-schnell (fast, 4-step — the default) or flux-dev (best quality, 20-step). Pass "model" to choose. Returns a base64 PNG.

Copycurl https://api.reinforce42.com/v1/images/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -d '{"model":"flux-dev","prompt":"a red fox in a snowy forest, golden hour","size":"1024x1024"}'
# -> {"created":..., "data":[{"b64_json":"iVBORw0KG..."}]}

Video generation

Video on our own DGX hardware. Two models — ltx-2.3 (best quality, 22B, synchronized audio — the default) and wan-2.2 (fast, silent). Choose with "model", resolution with "resolution" (480p, 720p, or 1080p). LTX-2.3 generates synchronized audio (voice + ambient sound) by default — pass "audio": false for a silent clip. It accepts several input modes:

Request parameters — everything the endpoint accepts:

Sampler internals (steps, seed, guidance) are not exposed — each model runs at its tuned quality/speed design point.

Generation takes a couple of minutes, so this is an async job API: submit, poll, then download the MP4 (with its audio track).

Copy# 1. submit
curl https://api.reinforce42.com/v1/video/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -d '{"model":"ltx-2.3","prompt":"a woman says: welcome to monkey, warm studio lighting","seconds":3,"resolution":"720p"}'
# -> {"id":"vid_abc","status":"queued","estimated_cost":0.15}

# 2. poll until status is "completed"
curl https://api.reinforce42.com/v1/video/generations/vid_abc \
  -H "Authorization: Bearer sk-your-api-key"
# -> {"status":"completed","video_url":"/v1/video/download/vid_abc.mp4"}

# 3. download the clip
curl -O https://api.reinforce42.com/v1/video/download/vid_abc.mp4

Keyframe conditioning (LTX-2.3) — anchor images at frames (frame 0 = first; positions snap to LTX's 8-frame stride; up to 6 keyframes). strength is 0–1. A single image field is shorthand for one keyframe at frame 0.

Copycurl https://api.reinforce42.com/v1/video/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -d '{
    "model": "ltx-2.3",
    "prompt": "the scene morphs from dawn to dusk, cinematic",
    "seconds": 4,
    "conditioning": [
      {"data": "data:image/png;base64,…", "frame": 0,  "strength": 1.0},
      {"data": "data:image/png;base64,…", "frame": 96, "strength": 1.0}
    ]
  }'

Errors & limits

Standard HTTP status codes. Bodies follow the OpenAI error shape: {"error": {"message": "...", "code": "..."}}.

Rate limits are per key (requests/min). Reliability is built in: failed calls retry automatically and unhealthy backends are taken out of rotation.

Credits & billing

reinforce42 is prepaid. Buy a credit pack and your balance is drawn down per token or audio minute. Manage everything in the account portal: live balance, usage, billing history, and top-ups.

Free trial & auto-recharge

New here? Start free — add a card and get $10 in free credit to try everything. No charge until you've used it up. When your balance runs low, we automatically charge your saved card $10 and top you up so your app never stops. Turn it off any time in the portal.

SDKs

Any OpenAI-compatible client works. Point the base URL at reinforce42.

Python

Copyfrom openai import OpenAI
client = OpenAI(base_url="https://api.reinforce42.com/v1", api_key="sk-your-api-key")
r = client.chat.completions.create(model="gpt-oss-120b",
        messages=[{"role":"user","content":"Hello!"}])
print(r.choices[0].message.content)

JavaScript / TypeScript

Copyimport OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.reinforce42.com/v1", apiKey: "sk-your-api-key" });
const r = await client.chat.completions.create({ model: "gpt-oss-120b",
  messages: [{ role: "user", content: "Hello!" }] });
console.log(r.choices[0].message.content);