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o3 vs Gemini 3.5 Flash-Lite

At a glance

OpenAI's most powerful reasoning model — top across math, coding, and science.

79200K ctx$2.00/$8.00 per M#27/92

Google's high-efficiency model for focused subagent work and multi-agent workflows.

1.0M ctx$0.30/$2.50 per M
Agent Demos
All agent demos

No shared agent demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI79.2
Reasoning & Knowledge
Graduate Science81.8%Expert-Level20.3%Factual Recall53.0%
Math
Math Problems97.8%Competition Math83.9%Research Math18.7%
Coding
Real-World Coding62.3%Code Editing81.3%
Agentic
Novel Reasoning6.5%Task Horizon1.5h
No benchmarks available

This model hasn't been benchmarked yet.

Specs
200K
Context
100K
Max output
Apr 2025
Released
1.0M
Context
66K
Max output
Jul 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$2.00/M tokens
Output$8.00/M tokens
Cache read$0.50/M tokens
Web search29%$0.01/search
Live pricing, shown before you run
Input85%$0.30/M tokens
Output69%$2.50/M tokens
Reasoning$2.50/M tokens
Cache read94%$0.03/M tokens
Cache write$0.08/M tokens
Image input$0.30/M tokens
Audio input$0.30/M tokens
Web search$0.01/search
Chat with o3Go to model
Chat with Gemini 3.5 Flash-LiteGo to model
Frequently Asked Questions: o3 vs Gemini 3.5 Flash-Lite▼

Which is better, o3 or Gemini 3.5 Flash-Lite?

▼

Both o3 and Gemini 3.5 Flash-Lite are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, o3 or Gemini 3.5 Flash-Lite?

▼

Gemini 3.5 Flash-Lite has a lower blended cost. o3: $2.00 input / $8.00 output. Gemini 3.5 Flash-Lite: $0.30 input / $2.50 output.

Which has a larger context window, o3 or Gemini 3.5 Flash-Lite?

▼

Gemini 3.5 Flash-Lite has a larger context window: o3 supports 200K tokens vs Gemini 3.5 Flash-Lite at 1M tokens.

Do both o3 and Gemini 3.5 Flash-Lite support vision?

▼

Yes, both o3 and Gemini 3.5 Flash-Lite support vision/image input.

What are the key differences between o3 and Gemini 3.5 Flash-Lite?

▼

Key differences: Gemini 3.5 Flash-Lite is significantly cheaper. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both o3 and Gemini 3.5 Flash-Lite for free on idapt.app to see which performs better for your specific needs.

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