Gemini 1.5 Pro vs Gemini 3.6 Flash

Side-by-side comparison of pricing, capabilities, benchmarks, and use case fit.

G

Gemini 1.5 Pro

Google

Overall 87

standard

G

Gemini 3.6 Flash

Google

Overall 92

fast

Capability radar

Normalized coding, reasoning, writing, vision, context, and value

Gemini 1.5 ProGemini 3.6 Flash

Comparison of Gemini 1.5 Pro vs Gemini 3.6 Flash
Metric	Gemini 1.5 Pro	Gemini 3.6 Flash
Input Price / 1M	$1.25	$1.50
Output Price / 1M	$5.00	$7.50
Combined Price / 1M	$6.25	$9.00
Context Window	2,097,152	1,000,000
Coding Score	86	91
Reasoning Score	87	92
Vision Score	88	94
Audio	No	Yes
Streaming	Yes	Yes
Function Calling	Yes	Yes
Latency Tier	standard	fast
Release Date	2/15/2024	7/21/2026

Gemini 1.5 Pro — Strengths & Weaknesses

Strengths

2M context
Mature API
Good document processing

Weaknesses

Being superseded by 2.5 series

Gemini 3.6 Flash — Strengths & Weaknesses

Strengths

Fast latency
Strong multimodal
Large context

Weaknesses

Pricing varies by endpoint/region

Use Case Verdicts

Coding

Gemini 3.6 Flash

Gemini 3.6 Flash scores 91 vs 86 on coding benchmarks.

General Chat

Gemini 3.6 Flash

Gemini 3.6 Flash leads on writing quality (90 vs 85).

Long Context

Gemini 1.5 Pro offers 2.1M tokens vs 1M.

Cost Efficiency

Gemini 1.5 Pro is cheaper at $6.25/M combined vs $9.00/M.

Enterprise Use

Gemini 1.5 Pro combines strong reasoning, tooling, and context for enterprise workloads.

Agent Workflows

Gemini 3.6 Flash

Gemini 3.6 Flash is better suited for agentic workflows with tool use and coding capability.