OpenAI officially released GPT-5.5 (codenamed “Spud”) on Thursday, April 23, 2026. This model is the first fully retrained base model since GPT-4.5 and marks a major strategic shift toward “agentic AI”—systems that can independently plan, iterate, and execute complex workflows rather than just generating text.
1. Key Variants: Standard & Pro
OpenAI has bifurcated the release to cater to different levels of professional and research needs:
- GPT-5.5 (Standard): The default model for high-efficiency professional work. It matches GPT-5.4’s latency but offers a significant step up in reasoning and tool use.
- GPT-5.5 Pro: A higher-intelligence variant reserved for the most demanding math, retrieval, and architectural tasks. It is available only to Pro, Business, and Enterprise subscribers.
2. Benchmark Performance
GPT-5.5 is designed to beat rivals like Claude Opus 4.7 in autonomous “computer use” and command-line tasks, though it slightly trails in pure multi-file coding precision.
| Benchmark | GPT-5.5 | Claude Opus 4.7 | Focus Area |
| Terminal-Bench 2.0 | 82.7% | 69.4% | CLI & DevOps Workflows |
| GDPval | 84.9% | 80.3% | Professional Knowledge Work |
| OSWorld-Verified | 78.7% | 78.0% | Autonomous Computer Use |
| SWE-Bench Pro | 58.6% | 64.3% | GitHub Issue Resolution |
3. Core Technical Improvements
- 1M Token Context: The model features a massive 1-million-token context window (400K in Codex), with a step-change in “needle-in-a-haystack” retrieval accuracy (74% on internal tests).
- Token Efficiency: While more expensive per token, OpenAI claims GPT-5.5 uses significantly fewer tokens to complete the same tasks as GPT-5.4, often making the “cost per task” lower.
- Native Computer Use: Improved ability to operate browsers, navigate desktop interfaces, and move across different tools without external middleware.
4. Availability and Pricing
| Surface / Tier | Availability | Monthly Cost |
| ChatGPT Plus | Standard Model Available Now | $20/month |
| ChatGPT Pro | Standard + Pro Available Now | $100–$200/month |
| Codex Desktop | Standard + Pro (400K Context) | Part of Paid Tiers |
| API | “Coming Soon” (Safeguards Pending) | $5 In / $30 Out (per 1M) |
5. Strategic Context: The Death of Sora
The release of GPT-5.5 confirms OpenAI’s decision to discontinue Sora and other consumer-focused video tools. The company is now reallocating its massive compute resources toward Enterprise Agents and a “Super App” for desktop that combines a browser, IDE, and terminal into a single AI-driven environment.
