EarlyTerms

GPT-5.5

Validating · Emerged · 54 days old · Last reviewed

GPT-5.5 is OpenAI's frontier language model released on April 23, 2026 — the first fully retrained base model since GPT-4.5, with every GPT-5.x release between them being a post-training iteration. Designed for autonomous, multi-step agentic tasks, it matches GPT-5.4's per-token latency while delivering higher intelligence with fewer tokens.

OpenAI released GPT-5.5 (internal codename "Spud") simultaneously to ChatGPT Plus, Pro, Business, and Enterprise users and in the Codex coding agent on April 23, 2026. API pricing is $5/$30 per million input/output tokens, with a GPT-5.5 Pro tier at $30/$180 and 1M context window. Terminal-Bench 2.0: 82.7%; SWE-Bench Pro: 58.6%; GDPval: 84.9%.

Think of it as a new chassis, not a new coat of paint — full retrain versus post-training tuning.

Search Interest

peak ~9.6K/mo
updated 2026-06-14
~9.6K/mo ~4.8K/mo 0
2026-05-16 2026-05-31 2026-06-14
Term Lifecycle
  1. Nascent
    0–7 days
  2. Emergent
    8–30 days
  3. Validating ← now
    31–90 days
  4. Rising
    91–180 days
  5. Established
    180 days +

Why is it emerging now?

TL;DR

On April 23, 2026, OpenAI released GPT-5.5 — the first fully retrained base model since GPT-4.5 — into ChatGPT and Codex simultaneously. The new architecture sets benchmark leads on Terminal-Bench 2.0 (82.7%) and GDPval (84.9%), with biosecurity risk rated 'High' under OpenAI's Preparedness Framework.

5 forces driving coverage — scroll →
OpenAI
Introducing GPT-5.5
First fully retrained base since GPT-4.5; Terminal-Bench 2.0: 82.7%, GDPval: 84.9%, SWE-Bench Pro: 58.6%
Apr 23, 2026
TechCrunch
OpenAI releases GPT-5.5, bringing company one step closer to an AI 'super app'
Greg Brockman: 'a faster, sharper thinker for fewer tokens'; OpenAI envisions ChatGPT + Codex + AI browser as unified enterprise super app
Apr 23, 2026
Y Hacker News
GPT-5.5
Apr 23, 2026 1447 points · 968 comments
XBOW
GPT-5.5: Mythos-Like Hacking, Open to All
Vulnerability miss rate drops from 40% (GPT-5) to 10%; outperforms GPT-5 even in black-box testing; 97.5% on visual acuity benchmarks
Apr 23, 2026
Axios
OpenAI releases 'Spud' GPT-5.5 model
Codename 'Spud'; early access teams reported saving up to 10 hours weekly; reactive to Anthropic's Opus 4.7 shipped one week prior
Apr 23, 2026

Outlook

6-month signal projection and commercial timeline.

Signal high
Revenue strong

Full-retrain architecture sets a new compute baseline; agentic and Codex integration ensures 6+ months of sustained enterprise and dev mindshare.

Risk · Rapid successor models (GPT-5.6, Claude Mythos) could compress the SEO window within 90 days.

Analogs · GPT-4 · Claude Opus 4.6 · Gemini 3.1 Pro

Monetization timeline
  1. now
    Comparison content, API integrations

    GPT-5.5 vs Opus 4.7 comparison articles and Codex integration guides rank immediately.

  2. 3-6mo
    Agentic tooling and courses

    Developer workshops and SaaS tools built on GPT-5.5 agentic API reach monetization.

  3. 6-12mo
    Enterprise migration and mini tier

    GPT-5.5 mini likely ships; enterprise migration guides and benchmark dashboards sustain traffic.

Competition & Opportunity for term “GPT-5.5” Placeholder

Needs at least one tracked query to compute — run enrich-trends or enrich-autocomplete to populate.

Content Gap
SERP dominated by X vs underserved queries
Revenue Potential
CPC range, affiliate availability, paid-platform count
Build Difficulty
Time-to-MVP, required integrations, incumbent lock-in

Ideas for term “GPT-5.5”

Buildable pitches — turn this term into an article, site, product, post, newsletter, video, or course. Steal any card and run with it.

Article
GPT-5.5 vs Claude Opus 4.7: Which Model Wins Your Workflow in 2026?

High commercial intent query with no definitive neutral guide yet. Benchmark split (Opus leads SWE-Bench Pro 64.3% vs 58.6%; GPT-5.5 leads Terminal-Bench 82.7% vs 69.4%) makes a workflow-segmented comparison highly rankable.

Article
GPT-5.5 API Pricing Explained: Standard, Pro, Batch, and Priority Tiers

Four-tier pricing ($5/$30, $30/$180, half-rate batch, 2.5x priority) creates natural long-tail around 'gpt-5.5 pricing' queries from API developers.

Article
What Is 'Fully Retrained' in GPT-5.5? How It Differs From GPT-5.4

Evergreen explainer targeting developers asking why GPT-5.5 feels different — architecture vs post-training distinctions are underexplained in current coverage.

Product
GPT-5.5 benchmark tracker with live Codex and SWE-Bench Pro updates

Rapid model release cadence (4 major models in 6 months) creates ongoing demand for a live leaderboard that goes beyond static blog posts.

Product
GPT-5.5 vs Opus 4.7 cost calculator: input your token usage, get real total-cost comparison

Pricing complexity ($5 vs $5 input but $30 vs $25 output) means most developers can't instantly calculate actual cost difference — a calculator converts SEO traffic to leads.

Video
GPT-5.5 vs Claude Opus 4.7: same agentic task, same prompt — who finishes first?

Head-to-head live demo on a real multi-step coding task (Terminal-Bench-style) produces immediately shareable YouTube content while the models are fresh.

Newsletter
This Week in Frontier Models — GPT-5.5 launch edition and what comes next

Rapid model cadence (OpenAI releasing every 4-6 weeks) creates a recurring newsletter anchor; GPT-5.5 is the hook for the first 3 issues.

Post HN / r/MachineLearning / tech blog
GPT-5.5 Is the First Real Retrain Since GPT-4.5. That's Bigger Than the Benchmarks.

Every GPT-5.x before 5.5 was post-training — same weights, better steering. GPT-5.5 changes the foundation.

Post Newsletter / LinkedIn
I Ran GPT-5.5 on the Same Tasks I Use Claude Opus 4.7 For. Here's What I Kept and What I Switched.

Anthropic leads SWE-Bench Pro 64.3% vs 58.6%. OpenAI leads Terminal-Bench 82.7% vs 69.4%. The right answer is not a single winner.

Post YouTube / Tech media
OpenAI's 'Super App' Strategy, Explained: Why GPT-5.5 + Codex + AI Browser Is the Bigger Story

The model drop is not the point. The product consolidation — ChatGPT + Codex + browser into one enterprise app — is the move OpenAI is making.

What People Search Placeholder

Long-tail queries to rank for — SERP-verified volumes pending enrichment.

Keyword
Est. Volume
Competition
Content Type
gpt-5.5 alternatives
—
Very low
Comparison
how to use gpt-5.5
—
Low
Tutorial
gpt-5.5 vs X
—
Medium
Comparison
gpt-5.5 pricing
—
Low
Explainer
Run make et-enrich-trends to populate real queries.

SERP of term “GPT-5.5”

What searchers see today — organic results on top, paid ads if anyone's bidding. Ad density is a real-time commercial signal.

FAQ

What is GPT-5.5?

GPT-5.5 is OpenAI's frontier language model released on April 23, 2026 — the first fully retrained base model since GPT-4.5, with every GPT-5.x release between them being a post-training iteration.

Why is GPT-5.5 emerging now?

On April 23, 2026, OpenAI released GPT-5.5 — the first fully retrained base model since GPT-4.5 — into ChatGPT and Codex simultaneously. The new architecture sets benchmark leads on Terminal-Bench 2.0 (82.7%) and GDPval (84.9%), with biosecurity risk rated 'High' under OpenAI's Preparedness Framework.

When did GPT-5.5 emerge?

Publicly emerged around 2026-04-23 (about 54 days ago as of 2026-06-16). EarlyTerms first recorded a pipeline signal on 2026-04-24.

Related Terms

Other terms in the same space — aliases, subtypes, competitors, and neighbors to explore next.

Explore next

Sources

Primary URLs this report cites — open any to verify the claim yourself.

  1. 01 OpenAI — Introducing GPT-5.5 openai.com ↗
  2. 02 TechCrunch — OpenAI releases GPT-5.5, one step closer to AI super app techcrunch.com ↗
  3. 03 Axios — OpenAI releases 'Spud' GPT-5.5 model axios.com ↗
  4. 04 XBOW — GPT-5.5: Mythos-Like Hacking, Open to All xbow.com ↗
  5. 05 MarkTechPost — GPT-5.5 fully retrained agentic model marktechpost.com ↗
  6. 06 One Useful Thing — Sign of the Future: GPT-5.5 (Ethan Mollick) oneusefulthing.org ↗
  7. 07 Hacker News — GPT-5.5 (1,447 points) news.ycombinator.com ↗