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Get started freeGPT-5.2 vs GPT-OSS 20B
Compare GPT-5.2 and GPT-OSS 20B. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | GPT-5.2 | GPT-OSS 20B |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Model Type | text | text |
| Context Window | 400,000 tokens | 128,000 tokens |
| Input Cost | $1.75/ 1M tokens | $0.00/ 1M tokens |
| Output Cost | $14.00/ 1M tokens | $0.00/ 1M tokens |
Stop choosing. Use both.
With Appaca you don't have to pick — build apps that are powered by GPT-5.2, GPT-OSS 20B, for your specific use case.
Build your first app freeStrengths & Best Use Cases
GPT-5.2
OpenAI1. Advanced Reasoning for Diverse Domains
- Built to tackle coding and agentic workflows across multiple industries, with configurable reasoning support.
2. Multi-Modal & Long-Form Capabilities
- Handles both text and image inputs, producing text output.
- Allows up to 128 k output tokens for lengthy responses.
3. Large Context & Updated Knowledge
- 400 k token context window accommodates extensive codebases or documents.
- Knowledge cut-off of Aug 31 2025 keeps it current with recent developments.
GPT-OSS 20B
OpenAI- Open-weight / Apache 2.0 licensed: you can use, modify, and deploy freely (commercially & academically) under permissive terms.
- Large model size (≈ 21B parameters) with Mixture-of-Experts (MoE) architecture: only ~3.6B parameters active per token, yielding efficient inference.
- Very long context window support: up to ~128 K tokens (or ~131 K tokens per some sources) enabling in-depth reasoning, long documents, or multi-turn context.
- Adjustable reasoning effort: you can trade latency vs quality by tuning “reasoning effort” levels.
- Efficient hardware requirements (for its class): designed to run on a single 16 GB-class GPU or optimized local deployments for lower latency applications.
- Strong for tasks such as reasoning, tool-use, structured output, chain-of-thought debugging: because the model is open and you can inspect its chain of thought.
- Flexibility: since weights are available, you can self-host, fine-tune, or deploy offline, giving more control than closed API models.
Prompts to Get Started
Use these prompts to power AI products you build on Appaca. Each works great with the models above.
Best for GPT-5.2
textExit Ticket Questions
Create quick exit ticket questions to check student understanding at end of lesson.
Project-Based Learning Rubric
Create a comprehensive rubric for assessing a project-based learning assignment.
Integration Test Plan
Write an integration test plan for a new service integration.
Best for GPT-OSS 20B
textPlain Language Terms of Service
Rewrite or summarise complex terms of service in clear, accessible language.
SMART Goal Refinement
Refine a vague goal into a specific, measurable, achievable SMART goal.
Lease Addendum Drafter (Permission + Restrictions)
Draft a professional lease addendum clause for special tenant requests (pets, installations, home business) with clear responsibilities and protections.