All Comparisons

Gemini 2.5 Flash vs o3

Gemini 2.5 Flash
Google 🇺🇸
43.4
#231—
medium
$0.30/M in · $2.50/M out
1M context
o3
OpenAI 🇺🇸
47.4
#202—
high
Most Affordable
Gemini 2.5 Flash
$0.30/M input
Largest Context
Gemini 2.5 Flash
1M tokens
Best Benchmark Score
o3
47.4/100

Model Specifications

SpecGemini 2.5 Flasho3
ProviderGoogleOpenAI
Release DateMay 2025Apr 2025
Knowledge Cutoff2025-01-312024-05-31
ParametersUndisclosedUndisclosed
Context Window1M—
Max Output——
Open SourceNoNo
Licenseproprietaryproprietary
Tokenizer——
Modality——
Reasoning ModelNoNo
ModeratedNoNo

Pricing Comparison

Price (per 1M tokens)Gemini 2.5 Flasho3
Input$0.30—
Output$2.50—

API Provider Pricing

Capabilities

FeatureGemini 2.5 Flasho3
Text Input
Image Input (Vision)
Audio Input
Video Input
File Input
Image Output
Audio Output
Tool Use
Structured Output (JSON)
Streaming
Reasoning Tokens
Web Search
Temperature Control
Top-P Sampling
Stop Sequences
Seed (Reproducibility)
Log Probabilities

Category Comparison

Benchmark-by-Benchmark

general

BenchmarkGemini 2.5 Flasho3
SimpleQA
26.9
—

coding

BenchmarkGemini 2.5 Flasho3
SWE-bench Verified
60.4
69.1

math

BenchmarkGemini 2.5 Flasho3
AIME 2025
72
86.4
FrontierMath—
15.8

reasoning

BenchmarkGemini 2.5 Flasho3
GPQA Diamond
82.8
83.3
Humanity's Last Exam
11
14.7
ARC-AGI v2—
6.5

multimodal

BenchmarkGemini 2.5 Flasho3
MMMU
79.7
82.9
MMMU-Pro—
76.4
CharXiv Reasoning—
78.6

agent

BenchmarkGemini 2.5 Flasho3
BrowseComp—
49.7

Category Winners

coding
o3
58.0
math
o3
43.6
reasoning
Gemini 2.5 Flash
44.3
general
Gemini 2.5 Flash
33.3
multimodal
Gemini 2.5 Flash
79.5
agent
o3
19.6

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Frequently Asked Questions