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Model comparison Synced Apr 6, 2026

Google: Gemini 2.5 Flash vs OpenAI: o3

Side-by-side comparison of Google: Gemini 2.5 Flash and OpenAI: o3. Compare pricing, context window, capabilities, and find out which is better for your workflow.

Verdict

strong confidence

Google: Gemini 2.5 Flash leads overall

Google: Gemini 2.5 Flash leads in price and context window and capabilities, making it the stronger choice for most workflows. OpenAI: o3 remains competitive with advantages in max output.

Best for with Google: Gemini 2.5 Flash

Budget-conscious workflowsLong document processingMulti-modal tasks

Best for with OpenAI: o3

Long-form content generation

Side-by-side

Technical specifications

Google: Gemini 2.5 Flash OpenAI: o3
Provider Google OpenAI
Input price $0.30/M $2/M
Output price $3/M $8/M
Context window 1.0M 200K
Max output 66K 100K
Capabilities
Tool useVisionAudioReasoning
Tool useVisionReasoning
Released Jun 17, 2025 Apr 16, 2025
View Google: Gemini 2.5 Flash profile View OpenAI: o3 profile

Scoring breakdown

How each dimension compares

Price

Google: Gemini 2.5 Flash leads

Google: Gemini 2.5 Flash

$3/M tokens

OpenAI: o3

$8/M tokens

Context Window

Google: Gemini 2.5 Flash leads

Google: Gemini 2.5 Flash

1.0M tokens

OpenAI: o3

200K tokens

Capabilities

Google: Gemini 2.5 Flash leads

Google: Gemini 2.5 Flash

4/4

OpenAI: o3

3/4

Max Output

OpenAI: o3 leads

Google: Gemini 2.5 Flash

66K tokens

OpenAI: o3

100K tokens

Recency

Google: Gemini 2.5 Flash

Jun 2025

OpenAI: o3

Apr 2025

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