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GPT-5.5

GPT-5.5 is a verified current AI model with official specs, pricing or access details, capabilities, best use cases and key limitations.

General Purpose Language ModelTextImage Paid
In plain English

What is this model and why does it matter?

GPT-5.5 is an OpenAI flagship model for complex coding and professional work with configurable reasoning and broad tool support.

CodingProfessional analysisAgentsComputer useLong-context workflows
Model overview

GPT-5.5: features, use cases and important details

GPT-5.5 is a current AI model verified from first-party OpenAI sources.

GPT-5.5 verified specifications

GPT-5.5 is an OpenAI flagship model for complex coding and professional work with configurable reasoning and broad tool support. Its verified context or usage limit is 1050000 tokens, with 128000 tokens maximum output.

GPT-5.5 pricing and access

GPT-5.5 costs $5 per 1M input tokens, $0.50 per 1M cached input tokens and $30 per 1M output tokens. Prompts above 272K input tokens use higher long-context rates.

GPT-5.5 best uses

Coding, Professional analysis, Agents, Computer use, Long-context workflows.

GPT-5.5 limitations

Long-context premium, No fine-tuning, Important outputs still need validation.

Get started

How to use this model

  1. Create an OpenAI API key.
  2. Call gpt-5.5.
  3. Choose reasoning effort.
  4. Provide text or image input.
  5. Add tools or structured outputs where needed.
Copy and try

Example prompts

  • Audit this codebase and propose a safe fix.
  • Analyze these documents and produce a decision memo.
  • Use tools to complete this multistep task.
Capabilities

What it can do

  • 1.05M context
  • 128K output
  • Reasoning controls
  • Image input
  • Function calling
  • Structured outputs
  • Computer use
  • MCP
Best for

Practical use cases

  • Software engineering
  • Agents
  • Research
  • Enterprise analysis
  • Document workflows
Pricing

What does it cost?

GPT-5.5 costs $5 per 1M input tokens, $0.50 per 1M cached input tokens and $30 per 1M output tokens. Prompts above 272K input tokens use higher long-context rates.

Input$5 / 1M tokens
Output$30 / 1M tokens
Simple summaryFlagship pricing is $5/M input and $30/M output, with a long-context premium above 272K input tokens.

What stands out

  • Strong professional performance
  • Very large context
  • Rich tool ecosystem

Things to consider

  • Higher cost than smaller GPT tiers
  • Proprietary
Limitations

Important restrictions and trade-offs

  • Long-context premium
  • No fine-tuning
  • Important outputs still need validation
SimplifyAITools verdict

Our editorial take

A major current OpenAI model with strong search and developer interest for coding, agents and professional work.

References

Primary sources

  1. Open source 1 ↗
  2. Open source 2 ↗
  3. Open source 3 ↗
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