On April 23, 2026, OpenAI officially launched GPT-5.5, an artificial intelligence model it presents as its smartest and most intuitive to date.
More than a simple technical upgrade, GPT-5.5 embodies a new class of intelligence: an AI designed to carry out real work, handle complex tasks and operate as an autonomous agent on the computer.
An intelligence centered on intent and execution
GPT-5.5 marks a clear break from traditional conversational models. OpenAI stresses that the model understands the user’s intent faster and can “take on more of the work itself.”
In practice, GPT-5.5 can:
- interpret ambiguous or incomplete instructions,
- plan an execution strategy,
- use tools (web browsing, code, software, documents),
- check its own results,
- keep working on the task until it is complete.
This ability places GPT-5.5 at the heart of agentic AI, where AI no longer just answers but acts over time.
Key gains where long-horizon reasoning is essential
OpenAI states that the most significant advances in GPT-5.5 are concentrated in areas where progress depends on reasoning across context and time:
- agentic coding (Codex),
- autonomous computer use,
- knowledge work (analysis, synthesis, reporting),
- exploratory scientific research.
These areas demand far more than correct answers: they require persistence, consistency and the ability to chain decisions together.
Performance comparison with the other leading models
The table below lists the key benchmarks published by OpenAI, in the same spirit as the official comparison.
GPT-5.5 compared with GPT-5.4, Claude Opus 4.7 and Gemini 3.1 Pro
| Benchmark / Capability | GPT-5.5 | GPT-5.4 | Claude Opus 4.7 | Gemini 3.1 Pro |
|---|---|---|---|---|
| Terminal-Bench 2.0 Complex, multi-tool workflows | 82.7% | 75.1% | 69.4% | 68.5% |
| GDPval (44 occupations) Wins or ties | 84.9% | 83.0% | 80.3% | 67.3% |
| OSWorld-Verified Autonomous use of a computer environment | 78.7% | 75.0% | 78.0% | — |
| Toolathlon Tool orchestration | 55.6% | 54.6% | — | 48.8% |
| BrowseComp Web browsing and comprehension | 84.4% | 82.7% | 79.3% | 85.9% |
| FrontierMath (Tier 1–3) | 51.7% | 47.6% | 43.8% | 36.9% |
| FrontierMath (Tier 4) | 35.4% | 27.1% | 22.9% | 16.7% |
| CyberGym Cybersecurity | 81.8% | 79.0% | 73.1% | — |
Key takeaway
On Terminal-Bench 2.0, the flagship benchmark for agentic work, GPT-5.5 outperforms Claude Opus 4.7 by more than 12 points, confirming its clear lead on complex, multi-step, tool-oriented tasks. Higher performance with no compromise on speed.
Despite its higher level of intelligence, GPT-5.5 keeps latency equivalent to GPT-5.4 in production.
It achieves this while using fewer tokens to complete the same tasks, particularly in coding with Codex.
For businesses, this means:
- more performance,
- better operational efficiency,
- a relative cost that is easier to control at scale.
GPT-5.5 in Codex and ChatGPT: from copilot to autonomous agent
In Codex, GPT-5.5 shows a stronger ability to:
- understand the overall structure of a software system,
- identify the real cause of a problem,
- anticipate the impact of a change,
- resolve complex tickets in a single pass.
In ChatGPT, the GPT-5.5 Thinking and GPT-5.5 Pro variants handle more demanding problems with answers that are more complete, better structured and more reliable, particularly for business, legal, educational and scientific uses.
A central building block of tomorrow’s AI infrastructure
OpenAI positions GPT-5.5 as a defining step toward a global agentic AI infrastructure capable of radically amplifying human productivity.
The ambition is clear: enable individuals and organizations to work at a fundamentally new speed by delegating entire blocks of cognitive work to intelligent agents.
Conclusion: a strategic shift, not a simple update
GPT-5.5 is not a routine iteration.
It marks a clear shift:
from AI that answers questions
to AI that executes objectives.
Against Claude Opus 4.7 and Gemini 3.1 Pro, GPT-5.5 now stands as the reference for agentic AI geared toward real work, paving the way for a new generation of autonomous digital coworkers.
