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. 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.
See nascent terms 7 days before everyone, unlock every stage filter, and get weekly early alerts.
Why is it 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.
Search Interest
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Nascent0–7 days
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Emergent8–30 days
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Validating31–90 days
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Rising ← now91–180 days
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Established180 days +
Outlook
6-month signal projection and commercial timeline.
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
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nowComparison content, API integrations
GPT-5.5 vs Opus 4.7 comparison articles and Codex integration guides rank immediately.
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3-6moAgentic tooling and courses
Developer workshops and SaaS tools built on GPT-5.5 agentic API reach monetization.
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6-12moEnterprise 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”
Signals derived from the tracked queries, the term's monetization cards, and its cluster neighbors. Heuristic except where marked measured (Google KD).
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.
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.
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.
Evergreen explainer targeting developers asking why GPT-5.5 feels different — architecture vs post-training distinctions are underexplained in current coverage.
Rapid model release cadence (4 major models in 6 months) creates ongoing demand for a live leaderboard that goes beyond static blog posts.
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.
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.
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.
Every GPT-5.x before 5.5 was post-training — same weights, better steering. GPT-5.5 changes the foundation.
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.
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
Long-tail queries from Google Suggest + Trends. Volume and competition are heuristics — directional, not audited. Content Type comes from query shape.
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 110 days ago as of 2026-08-11). 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.
- Part of agentic coding Agentic coding is the software-development pattern where an autonomous AI agent plans, writes, tests, and iterates on code against a… →
- Part of agentic-coding Agentic coding is the software-development pattern where an autonomous AI agent plans, writes, tests, and iterates on code against a… →
- Competitor Claude Opus 4.7 Claude Opus 4.7 is Anthropic's flagship LLM, released April 16, 2026. →
- Competitor claude-opus-4-7 Claude Opus 4.7 is Anthropic's flagship LLM, released April 16, 2026. →
- Competitor Claude Mythos Claude Mythos is an unreleased frontier LLM from Anthropic, publicly previewed on April 7, 2026. →
- Competitor claude-mythos Claude Mythos is an unreleased frontier LLM from Anthropic, publicly previewed on April 7, 2026. →
- Competitor Gemini 3.1 Flash Gemini 3.1 Flash is Google's mid-2026 speed-tier refresh of the Gemini model family — a family-of-variants brand rather than a single model. →
- Competitor gemini-3-1-flash Gemini 3.1 Flash is Google's mid-2026 speed-tier refresh of the Gemini model family — a family-of-variants brand rather than a single model. →
- Related OpenAI Codex CLI OpenAI Codex CLI is OpenAI's official terminal-resident coding agent: it reads a repo, edits files, runs commands, invokes subagents,… →
- Related openai-codex-cli OpenAI Codex CLI is OpenAI's official terminal-resident coding agent: it reads a repo, edits files, runs commands, invokes subagents,… →
- Related GPT-5.4 GPT-5.4 is OpenAI's March 2026 frontier language model that unifies the Codex and GPT product lines into a single system, adding native… →
- Related context window A context window is the span of tokens an LLM reads and reasons over in a single forward pass. →
- Competitor GLM-5 GLM-5 is Zhipu AI's (Z.ai) flagship open-weight large language model, a 744-billion-parameter Mixture-of-Experts system built for… →
- Competitor Hy3 Hy3 is Tencent Hunyuan's flagship open-weight large language model, a 295-billion-parameter Mixture-of-Experts system with 21B active… →
- Competitor LongCat 2.0 LongCat-2.0 is a 1.6-trillion-parameter mixture-of-experts language model from Meituan built for agentic coding, with 1M-token context… →
- Competitor Muse Spark 1.1 Muse Spark 1.1 is Meta Superintelligence Labs' second model release, a closed-weight multimodal reasoning model built for agentic tasks… →
- Competitor Release Mythos AI "Release Mythos AI" names the US government's June 26, 2026 authorization for Anthropic to deploy Claude Mythos 5 — its most powerful… →
- Related Sol Pro GPT-5.6 Sol Pro is the maximum reasoning-effort mode of OpenAI's flagship GPT-5.6 Sol model, reserved for ChatGPT Pro and Enterprise… →
- Competitor IndexShare IndexShare is a sparse-attention optimization that reuses one token-selection indexer across a group of transformer layers instead of… →
- Competitor Opus/Fable Opus/Fable is the compound shorthand builders use for treating Claude Opus 4.8 and Claude Fable 5 as a single working tier instead of… →
Sources
Primary URLs this report cites — open any to verify the claim yourself.
- 01 OpenAI — Introducing GPT-5.5 openai.com ↗
- 02 TechCrunch — OpenAI releases GPT-5.5, one step closer to AI super app techcrunch.com ↗
- 03 Axios — OpenAI releases 'Spud' GPT-5.5 model axios.com ↗
- 04 XBOW — GPT-5.5: Mythos-Like Hacking, Open to All xbow.com ↗
- 05 MarkTechPost — GPT-5.5 fully retrained agentic model marktechpost.com ↗
- 06 One Useful Thing — Sign of the Future: GPT-5.5 (Ethan Mollick) oneusefulthing.org ↗
- 07 Hacker News — GPT-5.5 (1,447 points) news.ycombinator.com ↗