psychology

Advanced Fusion 2.5

update Updated Dec 2025

folder AI & Models

What is Fusion 2.5?

Fusion 2.5 is s3eidatGPT's most capable model tier — it synthesizes outputs from multiple frontier models to produce the highest-quality response possible.

Capabilities

Deep research and synthesis across complex topics
Long-context document analysis (up to 128K tokens)
Advanced code generation and debugging
Creative writing with exceptional depth
Multi-step reasoning with built-in verification

Availability

Fusion 2.5 is exclusive to the Advanced plan. Select it from the model dropdown — it appears as 🔥 Advanced.

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