GPT-5.5 Models by OpenAI
OpenAIProprietary
4 models2026Up to 1.05m ctxFrom $5/1M input
Details
ResearcherOpenAI
LicenseProprietary
Commercial useCommercial use: conditional
Models4
Released2026
Max context1.05m
Capabilities
VisionAll models
MultimodalAll models
Reasoning3 of 4 models
Function Calling3 of 4 models
Tool Use3 of 4 models
Structured Outputs3 of 4 models
Code Execution3 of 4 models
Links
WebsiteAbout
GPT-5.5 is OpenAI's fully retrained frontier model family, released April 23, 2026. Designed for agentic coding, computer use, knowledge work, and early scientific research. The family includes standard and Pro variants, with the Pro targeting advanced math, business, legal, and data science tasks.
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
4 in view
GPT-5.5 InstantCurrent
Use when the workload needs 400k context, tool use, and function calling.
2026-05400k contexttool usefunction calling
GPT-5.5-CyberCurrent
Use when the workload needs cybersecurity, reasoning, and multimodal inputs.
2026-04cybersecurityreasoningmultimodal inputs
GPT-5.5Current
Use when the workload needs 1.05m context, reasoning, and tool use.
2026-041.05m contextreasoningtool use
GPT-5.5 ProCurrent
Use when the workload needs 1.05m context, reasoning, and tool use.
2026-041.05m contextreasoningtool use
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| GPT-5.5 Instant | Use when the workload needs 400k context, tool use, and function calling. | 2026-05 | 400k contexttool usefunction calling | Current |
| GPT-5.5-Cyber | Use when the workload needs cybersecurity, reasoning, and multimodal inputs. | 2026-04 | cybersecurityreasoningmultimodal inputs | Current |
| GPT-5.5 | Use when the workload needs 1.05m context, reasoning, and tool use. | 2026-04 | 1.05m contextreasoningtool use | Current |
| GPT-5.5 Pro | Use when the workload needs 1.05m context, reasoning, and tool use. | 2026-04 | 1.05m contextreasoningtool use | Current |
Release Timeline
2 release groups2026-05
1 current
GPT-5.5 Instant
Current400k contexttool usefunction calling
2026-04
3 current
GPT-5.5
Current1.05m contextreasoningtool use
GPT-5.5 Pro
Current1.05m contextreasoningtool use
GPT-5.5-Cyber
Currentcybersecurityreasoningmultimodal inputs
Specifications(4 models)
| Model | Released | Context | Vision | Multimodal | Reasoning | Fn Calling | Tool Use | Structured Outputs | Code Exec |
|---|---|---|---|---|---|---|---|---|---|
| GPT-5.5 Instant | 2026-05 | 400k | Yes | Yes | No | Yes | Yes | Yes | Yes |
| GPT-5.5-Cyber | 2026-04 | — | Yes | Yes | Yes | No | No | No | No |
| GPT-5.5 | 2026-04 | 1.05m | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| GPT-5.5 Pro | 2026-04 | 1.05m | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Available From(4 providers)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| GPT-5.5 | OpenAI API | $5 | $30 | Serverless |
| GPT-5.5 Instant | OpenAI API | $5 | $30 | Serverless |
| GPT-5.5 | OpenRouter | $5 | $30 | Serverless |
| GPT-5.5 | Vercel AI Gateway | $5 | $30 | Serverless |
| GPT-5.5 | AWS Bedrock | $5.5 | $33 | Serverless |
| GPT-5.5 Pro | OpenAI API | $30 | $180 | Serverless |
| GPT-5.5 Pro | OpenRouter | $30 | $180 | Serverless |
Popular comparisons in this family
Comparisons
- Grok 4.3 vs GPT-5.5
- Claude Sonnet 5 vs GPT-5.5
- GPT-5.5 vs Claude Fable 5
- GPT-5.5 Pro vs Claude Fable 5
- GPT-4o (08-06) vs GPT-5.5
- GPT-5.5 vs o3
- DeepSeek V3.1 vs GPT-5.5
- Claude Opus 4.8 vs GPT-5.5
Frequently Asked Questions
- What is GPT-5.5 used for?
- GPT-5.5 is used for cybersecurity, vision and multimodal work, and reasoning. The family description and listed model capabilities point to those workloads as the best fit.
- How does GPT-5.5 compare to GPT Realtime 2?
- GPT-5.5 by OpenAI is strongest where you need cybersecurity, while GPT Realtime 2 by OpenAI is the closest related family to check for realtime voice. GPT-5.5 has 4 listed variants and reaches up to 1.05m context, while GPT Realtime 2 reaches up to 131k context, so compare the specs and pricing tables before choosing a production model.
