Gemini CLI vs GPT-5.2 o1
A detailed comparison to help you choose the right AI tool for your needs.
Our Pick
GPT-5.2 Thinking
GPT-5.2 Thinking edges out Gemini CLI with superior overall performance and features that make it the better choice for most users.
Try GPT-5.2 o1Feature Comparison
Feature
Gemini CLI
GPT-5.2 o1
Ratings
Overall Rating
4.6
4.9
Coding
4.5
4.8
Writing
4.4
4.5
Reasoning
4.6
5.0
Speed
4.7
3.8
Value
5.0
4.0
Pricing
Monthly Price
$0
$200
Free Tier
Input (per 1M tokens)
$1.25
$15
Output (per 1M tokens)
$5
$60
Features
Context Window
1000K
128K
Vision/Images
Audio
Video
Code Generation
AI Agents
Gemini CLI
Pros
- Most generous free tier (1,000/day)
- 1M token context window
- Fully open source (Apache 2.0)
- Built-in Google Search grounding
- MCP support for extensions
Cons
- Newer than Claude Code
- Less proven in enterprise settings
GPT-5.2 Thinking
Pros
- Best reasoning model from OpenAI
- Edges out Gemini 3 and Claude Opus 4.5 on most tests
- Performs at/above human expert level on GDPval
- Excellent for coding, math, and document analysis
- State-of-the-art on SWE-Bench Pro
Cons
- Expensive ($200/mo for Pro subscription)
- Slower than Instant variant
- Requires Pro subscription for full access
- Writing can feel robotic
Choose Gemini CLI if you need:
Budget-conscious developers, large codebases, Google ecosystem users
Choose GPT-5.2 o1 if you need:
Complex reasoning, software engineering, research, math proofs
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.