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Interactive LLM testing

Test any model.
Right now.

An interactive playground for 200+ models. Chat, tweak parameters, compare responses, and generate integration code — all from your browser.

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Playground features

From prompt to production. Instantly.

Live Chat Interface

real-time · streaming

Full chat interface with conversation history, system prompts, and real-time streaming. Test prompts against any model before writing a single line of code.

gpt-4o
1.2s
Explain quantum computing in simple terms.
Quantum computing uses quantum bits (qubits) that can be 0, 1, or both at once — unlike classical bits. This lets quantum computers solve certain problems exponentially faster...
142 tokens$0.0021

200+ Models

Switch models mid-conversation. Compare responses across providers without changing a thing.

gpt-4oOpenAI
claude-3.5-sonnetAnthropic
gemini-proGoogle

Streaming

Real-time token streaming. Watch responses appear as the model generates them.

Generating

Code Generation

15 languages · auto-generated

Every playground session auto-generates integration code in 15 languages. Copy, paste, and ship — your exact prompt configuration, ready for production.

integration.py
from openai import OpenAI
client = OpenAI(
api_key="sk-nemo-...", # your virtual key
base_url="https://api.nemorouter.com/v1"
)
response = client.chat.completions.create(
model="gpt-4o",
messages=[{"role": "user", "content": "..."}],
temperature=0.7,
)
PythonNode.jsGoRubyJavaC#PHPRustcURLSwiftKotlinDartRElixirScala

Parameter Tuning

Fine-tune temperature, top_p, and max_tokens with visual sliders. See how parameters affect output in real time.

temperature0.7
top_p0.9
max_tokens2048

Your Virtual Key

Uses your own API key, stored in browser sessionStorage only. Cleared on tab close. Never the master key.

sk-nemo-...x4kfsessionStorage

Stop guessing. Start testing.

200+ models, real-time streaming, instant code generation. Test any model in seconds, ship integration code in minutes.

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