Gemini 2.5 Flash Preview Reasoning is an AI model from Google. A preview variant of Gemini 2.5 Flash with explicit reasoning mode, enabling structured chain-of-thought responses.
Specifications
Canonical IDgoogle-gemini-2-5-flash-preview-reasoning
StatusActive
CreatorGoogleGoogle
Benchmarks
Intelligence Index
31.1
#127
Coding Index
24.6
#144
Math Index
78.3
#67
MMLU-Pro
0.8
#37
GPQA
0.8
#98
HLE
0.1
#103
LiveCodeBench
0.7
#57
IFBench
0.5
#133
Time to First Token
SciCode
0.4
#79
AIME 2025
0.8
#67
LCR
0.6
#58
TerminalBench Hard
0.2
#156
TAU2
0.5
#176
Output TPS
0.0
#348

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 3.5 Flash1.0M$1.50$9.00Available
Gemini 3 Flash1.0M$0.500$3.00Available
Gemini 3 Flash Preview1.0M$0.500$3.00Available
Gemini 3 Flash ReasoningAvailable
Gemini 3 Flash Live$0.500$3.00Available
Gemini 3 Flash Live Live$0.750$4.50Available
Gemini 3.1 Flash ImageAvailable
Gemini 3.1 Flash Live$0.750$4.50Available
Gemini 3.1 Flash Live ImageAvailable
Gemini 3.1 Flash Live Preview131K$0.750$4.50Available
Gemini 2.5 Flash Preview ReasoningCurrent

Other models

ModelTierReleasedContextInput / 1MOutput / 1M
Gemini 3.1 Flash LiteFlash-lite1.0M$0.250$1.50
Gemini 3.1 Flash Lite PreviewFlash-lite1.0M$0.250$1.50
Gemini 3.1 Pro Preview Custom ToolsPro1.0M$2.00$12.00
Gemini 3.1 Pro PreviewPro1.0M$2.00$12.00
Gemini 3 Pro PreviewPro1.0M$2.00$12.00
Gemini 3 Pro ImagePro66K$2.00$12.00
Gemini 3 Deep Think
Gemini 3 ProPro$2.00$12.00
Gemini 3 Pro Preview LowPro
Gemini 3 Pro Image GenerationPro

Model IDs