by OpenAI
Latest GPT-5 variant with 1.05M token context, 33% fewer factual errors. Standard, Thinking, and Pro variants available.
GPT-5.4, released March 2026, is the latest iteration of OpenAI's flagship model. Features a 1.05M token context window, three variants (Standard, Thinking, Pro), and 33% fewer factual errors than GPT-5.2.
Standard: Quick responses, simple tasks, high-volume
Thinking: Complex reasoning, math, code analysis
Pro: Maximum quality, research, critical decisions
With 1M tokens, you can include everything:
Here is our complete API documentation (2000 pages).
Based on this, write a migration guide from v2 to v3 covering every breaking change.
| Use Case | Quality |
|---|---|
| Complex reasoning | Excellent |
| Large document analysis | Excellent |
| Code generation | Excellent |
| Multilingual tasks | Excellent |
| Creative writing | Very Good |
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