Available models
| Model | Context | Strengths | Premium? |
|---|---|---|---|
| GPT-5 | Large | Most capable OpenAI model; leading benchmark scores, broad capability | Yes |
| GPT-4.1 | 128k | Excellent coding and instruction-following | Yes |
| GPT-4.1-mini | 128k | Faster, more efficient version of 4.1 | Pro+ |
| GPT-4.1-nano | 128k | Ultra-fast, cost-efficient; standard tier | Standard |
| GPT-4o | 128k | Multimodal (vision), fast, strong all-around | Yes |
| GPT-4o-mini | 128k | Fast and efficient standard model | Standard |
| GPT-5-mini | — | Fast standard model; good general-purpose default | Standard |
| o3 | — | Advanced reasoning; top-tier for math and logic | Premium |
| o4-mini | — | Efficient reasoning; strong balance of speed and depth | Premium |
GPT model strengths
Coding and instruction-following
OpenAI’s GPT models are consistently strong at generating, debugging, and explaining code. GPT-4.1 in particular is optimized for coding tasks and excels at following precise multi-step instructions.Multimodal capabilities (GPT-4o)
GPT-4o accepts both text and images as input. Send screenshots, diagrams, charts, or photos alongside your text prompt and GPT-4o will analyze the visual content and respond. This is useful for:- Debugging from a screenshot of an error
- Analyzing charts or data visualizations
- Describing or understanding image content
- OCR and reading text from images
Broad general knowledge
GPT models are trained on extensive datasets and perform well across a wide range of domains — science, history, business, writing, and more.Reasoning models: o3 and o4-mini
OpenAI’s o-series models are specialized for extended reasoning. They think through problems step by step before responding, producing significantly better results on:- Complex mathematical problems and proofs
- Multi-step logical reasoning
- Challenging coding problems — algorithm design, optimization, debugging
- Research analysis and synthesis
- Any task where working through the problem carefully produces a better answer
| Model | Speed | Capability | Best for |
|---|---|---|---|
| o3 | Slower | Highest reasoning capability | The hardest problems where accuracy is paramount |
| o4-mini | Faster | Strong reasoning, more efficient | Most reasoning tasks — good balance of depth and speed |
Reasoning models (o3, o4-mini) are slower than standard GPT models — they take longer because they do more work before responding. Use them when you need the extra accuracy, not as a general-purpose default.
Choosing the right OpenAI model
| Use case | Recommended model |
|---|---|
| General chat and Q&A | GPT-4o-mini or GPT-5-mini |
| Complex coding and development | GPT-4.1 or GPT-5 |
| Analyzing images or screenshots | GPT-4o |
| Math, logic, hard reasoning | o3 or o4-mini |
| Fast iterations and drafts | GPT-4o-mini or GPT-5-mini |
| Highest-quality output | GPT-5 |
Standard tier OpenAI models
The following OpenAI models are in ZeroTwo’s standard tier — no monthly cap, available on all plans including Free:- GPT-5-mini: Fast, capable standard model. Good general-purpose default on Free or when conserving premium quota.
- GPT-4o-mini: Efficient, fast, and capable for routine tasks. 128k context.
- GPT-4.1-nano: Ultra-fast and cost-efficient for high-frequency simple tasks.
Best use cases
Software development
GPT-4.1 is a top choice for full-stack development, API design, code review, debugging, and technical documentation.
Multimodal analysis
GPT-4o’s vision capability makes it ideal for screenshot analysis, diagram interpretation, and visual content understanding.
Complex reasoning
o3 and o4-mini are OpenAI’s best models for math, logic, and problems that benefit from careful step-by-step thinking.
General content creation
GPT-5 and GPT-4o are strong choices for writing, research, analysis, and general-purpose tasks at high quality.
Related
Reasoning models
Full guide to o3, o4-mini, and how reasoning models work in ZeroTwo.
Anthropic (Claude)
Compare with Claude Sonnet 4.6 and Opus 4.6 for writing and long context.
Premium vs. Standard
Understand which OpenAI models count against your monthly quota.
Model picker
How to find and select OpenAI models in ZeroTwo.