GPT-5.4

OpenAI's general-purpose model from the GPT-5.4 series with a 1.05M token context window, released in early 2026 as the standard variant bridging lightweight and professional-grade tiers.

Strengths

Handles long-context tasks across reasoning, coding, and multimodal work with broad capability across document analysis, extended conversations, and complex workflows.

Best for

Document-heavy applications, long research sessions, and tasks requiring sustained context that don't require the specialized depth of GPT-5.4 Pro or the latest frontier capabilities of GPT-5.5.

Limitations

Superseded by GPT-5.5 for highest-accuracy reasoning and professional workloads; smaller context than GPT-5.4 Pro and lacks its unified system integration.