AI Chatbots · Head to head
GPT-4o vs GPT-5.1 / 5.2
Both are listed under AI Chatbots. GPT-4o is free plan, paid upgrades; GPT-5.1 / 5.2 is free plan, paid upgrades. Their listed features do not overlap, so the choice comes down to what you need done.
Free plan, paid upgrades
OpenAI's flagship multimodal intelligence engine, natively integrating text, vision, and real-time voice interaction.
Free plan, paid upgrades
OpenAI's planning and memory optimization update, delivering superior coding, research, and long-context processing.
At a glance
| GPT-4o | GPT-5.1 / 5.2 | |
|---|---|---|
| Pricing | Free plan, paid upgrades | Free plan, paid upgrades |
| Free to start | Yes | Yes |
| Category | AI Chatbots | AI Coding Tools |
| Features listed | 6 | 6 |
| HyzenPro rating | 4.9 / 5 | 4.8 / 5 |
Features compared
Only GPT-4o
- Native omni-multimodality (Text, Vision, Audio)
- Blazing-fast real-time speech interaction
- Advanced data analysis & code execution
- Custom GPTs workspace creator
- Excellent multimodal vision capabilities
- 128K token input context window
Only GPT-5.1 / 5.2
- Enhanced structured planning logic
- Deep contextual memory retention
- Advanced coding & multi-file debugging
- High-precision document QA systems
- Stable programmatic API versioning
- Efficient token management
Strengths and drawbacks
GPT-4o
- + Incredibly fluid real-time audio conversation capabilities
- + Exceptional speed and low-latency outputs
- + Excellent data visualization and document analysis
- + Very generous free tier on the web client
- − Hallucinations are still present on complex reasoning
- − API context window (128K) is smaller than Claude's 1M
- − Output tokens can sometimes feel slightly generic
GPT-5.1 / 5.2
- + Excellent planning and logical sequence construction
- + Vastly improved code generation and syntax accuracy
- + Subtle improvements in memory retrieval accuracy
- + Competitive API token cost structures
- − Noticeable processing latency on complex planning loops
- − Requires prompt engineering for complex agent configurations
Which one to pick
Choose GPT-4o if
- You need native omni-multimodality (Text, Vision, Audio).
- You need blazing-fast real-time speech interaction.
- You need advanced data analysis & code execution.
Choose GPT-5.1 / 5.2 if
- You need enhanced structured planning logic.
- You need deep contextual memory retention.
- You need advanced coding & multi-file debugging.
About each tool
GPT-4o
GPT-4o ("o" for omni) is OpenAI's state-of-the-art multimodal model. Built from the ground up as a native omni-model, it processes and generates any combination of text, audio, and visual inputs and outputs in real-time.It features incredibly low latency, superb conversational qualities, robust coding support, and is…
GPT-5.1 / 5.2
GPT-5.1 and GPT-5.2 represent OpenAI's key iteration updates focused on planning, structured memory retention, and codebase reasoning. Engineered to resolve logical dependencies and multi-file debugging tasks, it stands as an exceptional assistant for software developers and data analysts.With a robust retrieval…