OpenAI · Balanced
GPT-3.5 Turbo
Older model. Brought ChatGPT to the mainstream, seen as dated nowadays. 90% cheaper than GPT-4-Turbo, recommended for very simple tasks.
- Input
- Text
- Output
- Text
- Discovery tier
- Balanced
Pricing
USD per 1M tokens- Input
- $0.50
- Output
- $1.50
Reference prices as published by the model provider. API example
Specifications
- Context window
- 16.4K
- Max output
- 4.1K
Side by side
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Public evaluations
Benchmarks
Independent evaluation results, with how each score ranks among the models in the Noumen catalog.
Intelligence Index
5.5
Better than 1% of 326 scored models
Indexes
Coding Index
10.7Composite of the coding evaluations
Better than 5% of 168 scored models
Reasoning and knowledge
GPQA Diamond
29.7%Graduate-level science questions
Better than 1% of 291 scored models
MMLU-Pro
46.2%Multi-subject knowledge and reasoning
Better than 2% of 132 scored models
Math
MATH-500
44.1%Competition math problems
Better than 1% of 73 scored models
Scores from Artificial Analysis, updated Oct 26, 2026.
Developers
Use it through the API
Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.
curl https://www.noumen.xyz/api/v1/chat/completions \
-H "Authorization: Bearer $NOUMEN_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-3.5-turbo",
"messages": [{ "role": "user", "content": "Explain this stack trace." }]
}'import os
from openai import OpenAI
client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
model="openai/gpt-3.5-turbo",
messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)OpenAI
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