Gemini 2.5 Flash vs o4 Mini (Comparative Analysis)
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Comparative Analysis: Gemini 2.5 Flash vs. o4 Mini
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Overview
o4 Mini was released 2 months before Gemini 2.5 Flash.
 Gemini 2.5 Flash |  o4 Mini | |
|---|---|---|
Model Provider The organization behind this AI's development | Google | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 1M tokens | 200K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 65.5K tokens | 100K tokens |
Release Date When this model first became publicly available | June 17, 2025 1 year ago June 17th, 2025 | April 16, 2025 1 year ago April 16th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | January 31, 2025 | June 30, 2024 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Gemini 2.5 Flash | o4 Mini | |
|---|---|---|
Input Types Supported input formats | 📁File🖼️Image📝Text🎵Audio🎬Video | 🖼️Image📝Text📁File |
Reasoning Controls Defaults and configurable reasoning effort | Optional | Optional |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Gemini | GPT |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation |
Pricing
Gemini 2.5 Flash is roughly 0.3x less expensive compared to o4 Mini for input tokens and roughly 0.6x less expensive for output tokens.
| Gemini 2.5 Flash | o4 Mini | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.30 per million tokens | $1.10 per million tokens |
Output Token Cost Cost per million output tokens | $2.50 per million tokens | $4.40 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.014 per search | $0.01 per search |
Cache Read Cost Cost to reuse cached input tokens | $0.03 per million tokens | $0.28 per million tokens |
Cache Write Cost Cost to write input tokens to the cache | $0.08 per million tokens | Not specified |
Reasoning Token Cost Cost for internal reasoning tokens | $2.50 per million tokens | Not specified |
Image Input Cost Additional cost for each image input | $0.0000003 per image | Not specified |
Audio Input Cost Additional cost for audio input | $0.000001 per unit | Not specified |
Audio Cache Cost Cost to reuse cached audio input tokens | $0.10 per million tokens | Not specified |
Benchmarks
Compare relevant benchmarks between Gemini 2.5 Flash and o4 Mini.
| Gemini 2.5 Flash | o4 Mini | |
|---|---|---|
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,164 Elo (#63 in Data Viz (48.4% win rate)) | 1,061 Elo (#87 in Game Dev (50.0% win rate)) |
At a Glance
Quick overview of what makes Gemini 2.5 Flash and o4 Mini unique.
Gemini 2.5 Flash by Google understands both text and images, handles audio, analyzes video, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 1M token context window. Reasonably priced at $0.30/M input and $2.50/M output tokens. Released June 17th, 2025.o4 Mini by OpenAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 200K token context window. Reasonably priced at $1.10/M input and $4.40/M output tokens. Includes built-in content moderation for safer outputs. Released April 16th, 2025.Explore More Comparisons
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Compare o4 Mini with:
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Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
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