Google · Efficient
Gemini 2.5 Flash Lite Preview
Ultra-lightweight and fast variant of Gemini 2.5 Flash. Preview release optimized for speed and efficiency.
- Reasoning
- Vision
- Audio input
- Input
- Text, Images, Audio
- Output
- Text
- Reasoning effort
- low · medium · high
- Discovery tier
- Efficient
Pricing
USD per 1M tokens- Input
- $0.15
- Output
- $0.60
- Cache read
- $0.015
Reference prices as published by the model provider. API example
Specifications
- Context window
- 1M
- Max output
- 65.5K
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
6.7
Better than 6% of 326 scored models
Indexes
Math Index
35.3Composite of the math evaluations
Better than 33% of 118 scored models
Document reasoning
AA-LCRv1.1
32.0%Reasoning across long documents
Better than 13% of 309 scored models
Reasoning and knowledge
Humanity’s Last Exam
3.7%Expert-level questions across academic fields
Better than 4% of 323 scored models
GPQA Diamond
47.4%Graduate-level science questions
Better than 7% of 291 scored models
MMLU-Pro
72.4%Multi-subject knowledge and reasoning
Better than 26% of 132 scored models
IFBench
31.5%Following precise output instructions
Better than 6% of 215 scored models
Coding
LiveCodeBench
40.0%Recent competitive programming problems
Better than 31% of 129 scored models
Math
AIME 2025
35.3%Competition mathematics, 2025 problems
Better than 33% of 118 scored models
AIME
50.0%Competition mathematics
Better than 54% of 72 scored models
MATH-500
92.6%Competition math problems
Better than 54% of 73 scored models
Legacy evaluations
Terminal-Bench Hard
2.3%Earlier terminal task suite
Better than 5% of 212 scored models
τ²-Bench Telecom
19.0%Tool use in a customer-support simulation
Better than 7% of 214 scored models
AA-LCR (unversioned)
32.0%Long-context reasoning, earlier grading
Better than 13% of 309 scored models
Scores from Artificial Analysis, updated Oct 26, 2026. Artificial Analysis
Live routing data
Performance and reliability
Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.
- Prompt cache hits
- 0.0%
- About $0.15 per 1M input tokens with caching
- Request success (24h)
- 99.5%
- Reliable
Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.
- Healthy (98% or more)
- Degraded (90–98%)
- Down (under 90%)
- No requests
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": "gemini-2.5-flash-lite-preview-06-17",
"reasoning_effort": "medium",
"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="gemini-2.5-flash-lite-preview-06-17",
messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)Related models
Other Google models, starting with the same family.