The AI race just got more interesting. OpenAI dropped GPT-5.5 on April 23, 2026, and it's going head-to-head with Anthropic's Claude Opus 4.7. Both are frontier models. Both are gunning for the same users. But they're not the same — and depending on what you do, one is clearly better for you.

Here's the honest breakdown.

What GPT-5.5 Is Built For

OpenAI designed GPT-5.5 as an agentic model — meaning it's meant to take a messy, multi-step task and run with it autonomously. You don't have to hold its hand through every step. You give it a goal, and it plans, executes, checks its own work, and keeps going until it's done.

That shows up clearly in the benchmarks:

Terminal-Bench 2.0: 82.7% (vs. Opus 4.7's 69.4%)

OSWorld-Verified: 78.7% (vs. Opus 4.7's 78.0% — nearly tied)

BrowseComp: 84.4% (vs. Opus 4.7's 79.3%)

FrontierMath Tier 1–3: 51.7% (vs. Opus 4.7's 43.8%)

FrontierMath Tier 4: 35.4% (vs. Opus 4.7's 22.9%)

CyberGym: 81.8% (vs. Opus 4.7's 73.1%)

The coding gap is especially significant.…