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Claude Code Desktop App Redesigned
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AI ToolDead Man Walking
GPT 5.5 Review
GPT 5.5 is OpenAI's flagship large language model, built for complex agentic tasks, multi-step workflows, and general intelligence across various modalities.
shipped May 29, 2026aifreemium
1Released on April 23, 2026, succeeding GPT-5.4.
2API pricing for GPT-5.5 starts at $5 per 1M input tokens and $30 per 1M output tokens.
3Achieved a 71.4% (±8.0%) average pass rate on AI Security Institute's expert-level cyber tasks.
4Compliant with ISO/IEC 27001:2022, 27017:2015, 27018:2019, 27701:2019, 42001:2023 standards.
Stork Quadrant
Dead Man Walking· 13/100
An LLM can do most of what this tool's UI promises. No moat, no agent presence.
“GPT 5.5 is the product being replaced by itself. Every capability it offers is, by definition, what a frontier LLM does — there is no moat below the model layer. Brand is real: OpenAI has cultural authority and enterprise trust that Anthropic and Google are still fighting for. But brand alone at the model layer is fragile when the underlying capability is commoditizing fast.”
Defensibility · 7/100
- Physical-world coupling
- Regulatory moat
- Network liquidity
- Proprietary refreshing data
- High-trust catastrophic workflows
- Multi-party coordination
- Brand / community / taste
An LLM alone could replace
- Generate text, summaries, and structured documents from a prompt
- Write and debug code across any language
- Answer complex multi-step reasoning questions
- Plan and draft multi-step workflows or agent task sequences
Agent-Readiness · 20/100
- Verified MCP
- Listed on agent surfaces— anthropic_directory, cursor
- Usage-based pricing
- Headless agent auth
- Public OpenAPI
- Active changelog
- llms.txt
How to defend
The only durable move is owning the rails — memory, tool-use APIs, fine-tuning pipelines, and enterprise compliance contracts that make switching painful. The model is not the moat; the ecosystem lock-in is.
- Ship an MCP server and list it on Stork — biggest single point gain (+25).
- Add a usage-based or per-call tier; per-seat-only pricing dies when agents replace seats (+15).
- Expose API-key auth with a self-serve sandbox tier; remove sales-call gates (+15).
- Publish an OpenAPI spec at /openapi.json or /.well-known/openapi (+10).
- Publish a public changelog and ship in the last 90 days — silence reads as abandonment (+10).
GPT 5.5 at a Glance
About GPT 5.5
Pricing Plans
Plus
$20/mo / monthly
- • Access to GPT-5
- • Faster response times
- • Priority access during peak times
Pro
$50/mo / monthly
- • All Plus features
- • Advanced features for developers
- • Increased usage limits
Business
Custom pricing / annual
- • All Pro features
- • Dedicated support
- • Custom integrations
Enterprise
Custom pricing / annual
- • All Business features
- • Enhanced security and compliance
- • Custom SLAs
Leadership
Elon MuskCo-founder
Sam AltmanCo-founder
Greg BrockmanCo-founder
Investors
Y Combinator, Microsoft, Khosla Ventures
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overview
What is GPT 5.5?
GPT 5.5 is a large language model tool developed by OpenAI that enables developers, businesses, and researchers to perform complex agentic tasks, multi-step workflows, and general intelligence across various modalities. It represents a significant advancement over its predecessor, GPT-5.4, with enhanced capabilities in planning, tool use, and error recovery.
quick facts
Quick Facts
| Attribute | Value |
|---|---|
| Developer | OpenAI |
| Business Model | Freemium / Hybrid (Subscription SaaS & Usage-based) |
| Pricing | Freemium starting at $5 per 1M input tokens (API) / $20/mo (ChatGPT Plus) |
| Platforms | Web, API, Mobile |
| API Available | Yes |
| Integrations | Slack, Zapier, Microsoft Teams |
| Founded | 2015 |
| HQ | San Francisco, USA |
| Funding | Series D, $1 billion |
features
Key Features of GPT 5.5
GPT 5.5 incorporates advanced architectural designs to facilitate complex reasoning, multi-step task execution, and robust multimodal processing. Its feature set is engineered for high-stakes professional applications requiring precision and autonomous operation.
- 1Complex Agentic Task Execution: Designed for multi-step, tool-using workflows over extended time horizons.
- 2Multimodal (technology) Input Processing: Capable of understanding and generating content from both text and image inputs.
- 3Advanced Coding and Software Development: Excels in agentic coding, complex software generation, and debugging.
- 4Enhanced Error Recovery: Demonstrates significant improvements in recovering from errors during long interactions.
- 5Efficient Tool Use: Optimized for more effective and reliable integration with external tools.
- 6Configurable Data Retention: Offers a Zero Data Retention option for eligible API endpoints and configurable retention for enterprise products.
- 7HIPAA Alignment: Business Associate Agreements (BAA) are available for eligible API services and ChatGPT for Healthcare.
- 8ISO/IEC Certified: Holds ISO/IEC 27001:2022, 27017:2015, 27018:2019, 27701:2019, 42001:2023 certifications.
- 9SOC 2 Type 2 Compliant: Adheres to SOC 2 Type 2 security standards.
- 10Default_off User Data Training: User data is not used for training by default, with an opt-in option for the API dashboard.
use cases
Who Should Use GPT 5.5?
GPT 5.5 is primarily targeted at professionals and organizations requiring a highly capable AI for demanding, complex workloads. Its design supports a range of applications from advanced software engineering to deep scientific inquiry.
- 1Developers/Engineers: For complex agentic coding, generating intricate software, and debugging processes.
- 2Researchers/Analysts: For conducting deep research, analyzing extensive information, and deriving scientific insights.
- 3Business Professionals: For problem-solving, advanced reasoning, and generating high-quality documents and spreadsheets.
- 4Writers/Content Creators: For generating high-quality text, code, and images, and facilitating creative ideation and brainstorming.
- 5Cybersecurity Teams: Vetted teams can utilize GPT-5.5-Cyber under OpenAI's Trusted Access for Cyber program for specialized security tasks.
pricing
GPT 5.5 Pricing & Plans
GPT 5.5 is available through OpenAI's API and via paid ChatGPT subscription plans. GPT-5.5 Instant is accessible to free-tier ChatGPT users. API pricing is usage-based, calculated per million tokens.
- 1GPT-5.5 API: Input Price $5 per 1M tokens, Output Price $30 per 1M tokens.
- 2GPT-5.5 Pro API: Input Price $30 per 1M tokens, Output Price $180 per 1M tokens.
- 3ChatGPT Plus: $20/month (monthly subscription for advanced features).
- 4ChatGPT Pro: $50/month (monthly subscription offering enhanced capabilities).
- 5ChatGPT Business: Custom pricing (annual subscription for organizational use).
- 6ChatGPT Enterprise: Custom pricing (annual subscription for large-scale enterprise deployments).
- 7GPT-5.5 Instant: Available to free-tier ChatGPT users.
competitors
GPT 5.5 vs Competitors
GPT 5.5 is positioned as OpenAI's frontier model, designed for complex professional workloads and demonstrating superior performance in specific benchmarks against key competitors in the large language model market.
1
Anthropic Claude Opus↗
Excels in complex reasoning, coding, and knowledge work, with a strong focus on safety and a large context window, often reaching 1 million tokens.
Claude Opus models, like GPT 5.5, are designed for frontier AI tasks and multimodal processing. Claude Opus 4.7 offers a 1 million token context window at standard pricing and is noted for strong performance in advanced coding and multi-tool orchestration, while GPT-5.5 shows strengths in terminal-first agentic workflows and certain benchmarks. Pricing for Opus 4.7 is $5 per million input tokens and $25 per million output tokens, comparable to GPT-5.5's reported $5/$30 per million tokens.
2
Google Gemini Advanced↗
Natively multimodal, designed to process and understand various data types including text, images, audio, and video, with deep integration into Google's ecosystem.
Gemini Ultra and its successors (like 1.5 Pro, 3.1 Pro) are highly competitive with GPT 5.5 in multimodal understanding and complex reasoning. Gemini Advanced offers a freemium model with a paid tier at $19.99/month for access to its most advanced models and Google Workspace integration, similar to GPT 5.5's freemium model with paid tiers. Gemini 3.1 Pro is noted for its long context window (up to 2M tokens) and aggressive pricing for processing large documents.
3
Mistral Large↗
Offers top-tier reasoning and multimodal capabilities with a focus on efficiency and competitive pricing, particularly for enterprise use cases.
Mistral Large 3 provides strong performance in reasoning and multimodal tasks, often at a more cost-efficient price point compared to models like GPT-5.5. While GPT-5.5 is noted for complex agentic and coding workloads, Mistral Large 3 also supports vision, function calling, and structured output. Mistral Large 3 pricing is $0.50 per million input tokens and $1.50 per million output tokens, making it significantly cheaper than GPT-5.5's reported $5/$30.
4
Meta Llama 3↗
An open-source, open-weight large language model that provides flexibility for customization and private deployments, with competitive performance.
Llama 3.1, while open-source and offering cost-efficiency and customization, competes with GPT 5.5 in performance, particularly in mathematical reasoning and coding tasks. Unlike GPT 5.5's proprietary access, Llama 3.1 can be self-hosted or accessed via various API providers, with pricing often being more cost-effective for high throughput.
❓
Frequently Asked Questions
+What is GPT 5.5?
GPT 5.5 is a large language model tool developed by OpenAI that enables developers, businesses, and researchers to perform complex agentic tasks, multi-step workflows, and general intelligence across various modalities. It represents a significant advancement over its predecessor, GPT-5.4, with enhanced capabilities in planning, tool use, and error recovery.
+Is GPT 5.5 free?
GPT 5.5 operates on a freemium model. GPT-5.5 Instant is available to free-tier ChatGPT users. Access to the full GPT-5.5 model via API is usage-based, starting at $5 per 1M input tokens and $30 per 1M output tokens. Paid ChatGPT plans, such as Plus ($20/month) and Pro ($50/month), also provide access to GPT 5.5.
+What are the main features of GPT 5.5?
Key features of GPT 5.5 include complex agentic task execution, multimodal input processing (text and images), advanced coding capabilities, enhanced error recovery, and efficient tool use. It also offers configurable data retention, HIPAA alignment, and holds ISO/IEC and SOC 2 Type 2 certifications.
+Who should use GPT 5.5?
GPT 5.5 is designed for developers, engineers, researchers, analysts, business professionals, and content creators who require an advanced AI for complex, multi-step workflows. Specialized variants like GPT-5.5-Cyber are available for vetted cybersecurity teams.
+How does GPT 5.5 compare to alternatives?
GPT 5.5 demonstrates strong performance in agentic workflows and specific benchmarks against competitors like Anthropic Claude Opus and Google Gemini Advanced. While competitive in multimodal understanding, GPT 5.5's API pricing is higher than models like Mistral Large 3, which offers similar capabilities at a lower cost. Unlike Meta Llama 3, GPT 5.5 is a proprietary model.
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