Gemini 4 Argon
Advanced reasoning and long-horizon coding for demanding workflows.
$2.00 in · $10.00 out / 1M
gemini-4-argonTokenRex brings Google's full creative and reasoning line-up to one OpenAI-compatible API: Gemini chat models, Gemini image generation, Veo video, Lyria music, text-to-speech, transcription and embeddings. One key, one wallet, and the same request format you already use.

The Google models most people start with. Prices are live and update automatically.
Advanced reasoning and long-horizon coding for demanding workflows.
$2.00 in · $10.00 out / 1M
gemini-4-argonFast multimodal intelligence for coding, reasoning, and agentic workflows.
$0.75 in · $3.75 out / 1M
gemini-3.8-flashAdvanced multimodal reasoning for complex problems and coding tasks.
$2.00 in · $12.00 out / 1M
gemini-3.1-pro-previewCreate and edit detailed images with support for complex visual instructions.
$0.134 per image
gemini-3-pro-imageGenerate high-quality video with cinematic control and synchronized audio.
$0.40 per second
veo-3.1Create longer music tracks with vocals or instrumentals from creative prompts.
$0.08 per song
lyria-3-pro-previewGenerate natural-sounding speech from text with low-latency synthesis.
$0.0341 per 1k chars
gemini-3.1-flash-tts-previewCreate multimodal embeddings for semantic search, retrieval, and recommendations.
$0.20 in / 1M
gemini-embedding-2Gemini 4 Argon and Gemini 3.8 Flash for chat, coding, long documents and agent workflows.
Gemini image models create and edit detailed images, including 2K and 4K versions.
Generate short videos with Veo 3.1 or the lower-cost Veo 3.1 Lite. Start a job, then check its status.
Create music clips and longer tracks from a text or image prompt, returned as MP3.
Natural text-to-speech voices and multilingual transcription.
Gemini embeddings for semantic search, retrieval and recommendations.
TokenRex sits between your app and Google. You send a normal API request with your TokenRex key; we check the key and your balance, pass the request to Google, stream the answer back, and bill the exact usage Google reports.
Your app
SDK, agent or BYOK tool
TokenRex
Checks key and balance
Runs the Google model
Answer + bill
Streamed back, billed per use
Sign up with email or Google. New accounts can claim free starter credit.
Open API keys in your dashboard and create a key. Keep it private.
Set the base URL to https://tokenrex.ai/api/public in your SDK or BYOK app and paste your key.
Copy the exact model ID from the list on this page, for example from a flagship card.
Each request is billed at the live model price and deducted from your prepaid wallet.
Python · OpenAI SDK
from openai import OpenAI
client = OpenAI(
base_url="https://tokenrex.ai/api/public",
api_key="YOUR_TOKENREX_KEY",
)
reply = client.chat.completions.create(
model="gemini-3.8-flash",
messages=[{"role": "user", "content": "Write three product taglines for a solar lamp."}],
)
print(reply.choices[0].message.content)Endpoints for Google models
POST /v1/chat/completionsGemini chat, with streamingPOST /v1/images/generationsGemini image generationPOST /v1/videosStart a Veo video jobGET /v1/videos/{id}Check a video jobPOST /v1/musicLyria music generationPOST /v1/audio/speechText-to-speechPOST /v1/audio/transcriptionsSpeech-to-textPOST /v1/embeddingsEmbeddings32 models in 27 families. Open a model to see every version, cache rates and limits.
Top up once and every request is deducted from your balance. No subscription and no monthly minimum.
If Google reports cached input tokens, they are billed at the model's lower cache-read rate.
Where offered, Fast versions answer about 2x faster at 2x the price.
No. You only need a TokenRex account and API key. TokenRex handles the connection to Google.
Not yet. Call Gemini models through the OpenAI-compatible endpoints listed on this page.
Veo video is billed per second of video and Lyria per track, at the live price on each model page.
Some are. Model pages show a Deprecated tag and the shutdown date Google has announced, when there is one.
Google and its logo are trademarks of their owner and are shown only to identify the models available. TokenRex is an independent service by Asirex Labs and is not affiliated with or endorsed by Google.