GPT-5.2 o1 vs Synthesia
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 Synthesia with superior overall performance and features that make it the better choice for most users.
Try GPT-5.2 o1Feature Comparison
Feature
GPT-5.2 o1
Synthesia
Ratings
Overall Rating
4.9
4.6
Coding
4.8
-
Writing
4.5
-
Reasoning
5.0
-
Speed
3.8
4.5
Value
4.0
4.4
Pricing
Monthly Price
$200
$22
Free Tier
Input (per 1M tokens)
$15
-
Output (per 1M tokens)
$60
-
Features
Context Window
128K
-
Vision/Images
Audio
Video
Code Generation
AI Agents
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
Synthesia
Pros
- Realistic AI avatars
- 140+ languages and voices
- No video production skills needed
- Fast turnaround
- Enterprise-ready with SOC 2 compliance
Cons
- Avatar-based only (no text-to-video)
- Limited creative flexibility
- Higher cost for heavy usage
- Avatars may feel uncanny to some viewers
Choose GPT-5.2 o1 if you need:
Complex reasoning, software engineering, research, math proofs
Choose Synthesia if you need:
Training videos, corporate communications, localization
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.