Model Comparison

Gemini 1.5 FlashGemini 2.5 Pro
Let's see who can write code better - Gemini 1.5 Flash or Gemini 2.5 Pro

Model Information

Gemini 1.5 Flash

Google

Description

Fast and efficient multimodal model optimized for speed (deprecated - no longer available in API)

Specifications

Context Window1.0M
Max Output8K
ReleasedMay 2024
API✓

Pricing (per 1M)

In / Out
$0.075/ $0.3

Key Features

Fast inferenceLarge context windowMultimodalCost-effective

Strengths

  • ✓Very fast responses
  • ✓Good balance of capability and speed
  • ✓Affordable pricing
  • ✓Strong for its size

Weaknesses

  • ✗Less capable than Pro version
  • ✗May struggle with complex reasoning
  • ✗Limited availability in some regions

Agent Support

No known agents

Gemini 2.5 Pro

Google

Description

Advanced Gemini model with massive context capabilities

Specifications

Context Window1.0M
Max Output8K
ReleasedJan 2025
API✓

Pricing (per 1M)

In / Out
$1.25/ $10

Key Features

1M+ token contextState-of-the-art performanceMulti-modal native

Strengths

  • ✓Unprecedented context length
  • ✓Superior performance
  • ✓Advanced capabilities

Weaknesses

  • ✗Higher cost than Flash models
  • ✗May be slower for simple tasks

Agent Support