by OpenAI
OpenAI's most capable model with advanced reasoning and tool use.
GPT-5 is OpenAI's most capable reasoning model, released in late 2025. It excels at complex multi-step tasks, long-form content, and nuanced instruction-following.
GPT-5 follows formatting instructions precisely. Specify exactly what you want:
Respond in JSON with these exact fields:
{ "summary": string (max 100 words), "score": number (1-10), "tags": string[] }
GPT-5's system message adherence is excellent. Put behavioral rules there:
System: You are a senior financial analyst. Always cite sources. Never speculate without labeling it as speculation. Format numbers with proper units.
For complex reasoning, explicitly request step-by-step thinking:
Think through this step by step before giving your final answer.
Show your reasoning process.
| Use Case | Quality |
|---|---|
| Complex analysis & reasoning | Excellent |
| Code generation (all languages) | Excellent |
| Creative long-form writing | Very Good |
| Data extraction & structuring | Excellent |
| Math and science | Excellent |
| Summarization | Very Good |
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