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GPT-5 vs GPT-4 API Differences: What Changed and Why It Matters
June 30, 2025•8 min read•FromYou AI Team
Headline Improvements
- • Native multimodal inputs with unified token space
- • Longer context windows and better long-range consistency
- • Stronger function/tool calling with more reliable arguments
- • Significant reasoning and code synthesis upgrades
Migration Tips
- • Audit prompts for assumptions about model behavior; re-run evals.
- • Test function/tool schemas with edge-case arguments.
- • Update token budgets; leverage summarization for context overflow.
- • Validate image/audio/video payload sizes and formats.
Dig Deeper
See the API docs overview, follow the integration guide, and review pricing.