GPT 5.4: Codex Gets a Major Upgrade, Pushing Agent Capabilities Further
research#agent📝 Blog|Analyzed: Mar 18, 2026 13:16•
Published: Mar 18, 2026 13:02
•1 min read
•InterconnectsAnalysis
GPT 5.4 in Codex marks a significant leap forward in the capabilities of OpenAI's agents! This new model demonstrates impressive improvements across correctness, ease of use, speed, and cost, hinting at a future where agents can handle a wider array of complex tasks with remarkable efficiency.
Key Takeaways
- •GPT 5.4 represents a notable advancement in OpenAI's agent technology.
- •The model shows enhanced performance in key areas like correctness and usability.
- •This progress suggests the potential for agents to tackle increasingly complex tasks.
Reference / Citation
View Original"GPT 5.4 in Codex, always on fast mode and high or extra-high effort, is the first OpenAI agent that feels like it can do a lot of random things you can throw at it."