/AI5d ago

OpenAI's Thibault Sottiaux teases a GPT-5 roadmap where sequential decimal increments through GPT-5.5 deliver efficiency and speed gains

The efficiency gains target costs in long-running agentic workflows

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Tibo@thsottiaux#768inAI

When we go from GPT-5.0 -> GPT-5.1 -> ... -> GPT-5.5, the number incrementing goes with improvements in capabilities and token efficiency (which translates to speed gains). With GPT-5.5 our best model yet.

A simple strategy that we would like to continue.

12:41 AM · May 30, 2026 · 462.2K Views
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Eric@ericmitchellai

OpenAI is famous for leaks but man to just go out there and tell people we will train more models

Huge alpha in following this guy

Tibo@thsottiaux

When we go from GPT-5.0 -> GPT-5.1 -> ... -> GPT-5.5, the number incrementing goes with improvements in capabilities and token efficiency (which translates to speed gains). With GPT-5.5 our best model yet.

A simple strategy that we would like to continue.

4dViews 257.5KLikes 966Bookmarks 178
RETWEETS22REPLIES42
Chubby♨️@kimmonismus

It’s reasonable to expect that the next iteration will be better. It would be surprising if GPT-5.6 wasnt an improvement over GPT-5.5.

But the more interesting part is token efficiency. As models move into more complex, longer-running, agentic workflows, every wasted token becomes latency, cost, and friction. Obv.

GPT-5.5 seems to be a real step here: not just more capable, but more efficient in how it reasons and executes. Kudos. High hopes for 5.6 being even more efficient.

Tibo@thsottiaux

When we go from GPT-5.0 -> GPT-5.1 -> ... -> GPT-5.5, the number incrementing goes with improvements in capabilities and token efficiency (which translates to speed gains). With GPT-5.5 our best model yet.

A simple strategy that we would like to continue.

4dViews 69.4KLikes 684Bookmarks 46