Gemini 2.5 Flash Lite Preview Reasoning is an AI model from Google. A preview variant of Gemini 2.5 Flash Lite with explicit reasoning mode enabled for step-by-step problem solving at low cost.
Specifications
Canonical IDgoogle-gemini-2-5-flash-lite-preview-reasoning
StatusActive
CreatorGoogleGoogle
Benchmarks
Intelligence Index
21.6
#210
Coding Index
18.2
#195
Math Index
68.7
#91
MMLU-Pro
0.8
#90
GPQA
0.7
#180
HLE
0.1
#204
LiveCodeBench
0.7
#71
IFBench
0.5
#133
Time to First Token
SciCode
0.3
#242
AIME 2025
0.7
#91
LCR
0.6
#92
TerminalBench Hard
0.1
#175
TAU2
0.3
#223
Output TPS
0.0
#347

Capabilities

Input0/5
Text·
Image·
Audio·
Video·
PDF·
Output0/5
Text·
Image·
Audio·
Video·
Embedding·
Capabilities0/13
Reasoning·
Adaptive Reasoning·
Function Calling·
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Gemini 3.1 Flash Lite1.0M$0.250$1.50Available
Gemini 3.1 Flash Lite Preview1.0M$0.250$1.50Available
Gemini 3.1 Flash Lite Live$0.250$1.50Available
Gemini 3.1 Flash Lite Live Preview$0.250$1.50Available
Gemini 3.1 Flash Lite Live TunedAvailable
Gemini 3.1 Flash Lite TunedAvailable
Gemini 2.5 Flash Lite Preview1.0M$0.100$0.400Deprecated
Gemini 2.5 Flash Lite1.0M$0.075$0.300Available
Gemini 2.0 Flash Lite1.0M$0.075$0.300Deprecated
Gemini 2.5 Flash Lite Preview ReasoningCurrent
Gemini 2.5 Flash Lite ReasoningAvailable

Other models

ModelTierReleasedContextInput / 1MOutput / 1M
Gemini 3.1 Flash ImageFlash131K$0.500
Gemini 3.5 FlashFlash1.0M$1.50$9.00
Gemini 3.1 Pro Preview Custom ToolsPro1.0M$2.00$12.00
Gemini 3.1 Pro PreviewPro1.0M$2.00$12.00
Gemini 3 FlashFlash1.0M$0.500$3.00
Gemini 3 Flash PreviewFlash1.0M$0.500$3.00
Gemini 3 Pro PreviewPro1.0M$2.00$12.00
Gemini 3 Pro ImagePro66K$2.00$12.00
Gemini 3 Flash ReasoningFlash
Gemini 3 ProPro$2.00$12.00

Model IDs