OpenAI
GPT-6.1 Sol
gpt-6.1-sol
Total Context
1.1M
Max Output
128K
Released
N/A
Input$2 / M tokens
Output$10 / M tokens
GPT-5.5 Pro
gpt-5.5-proGPT-5.5 Pro is the higher-compute variant of OpenAI’s GPT-5.5 generation, intended for the hardest professional tasks where answer quality matters more than speed. OpenAI materials describe the Pro tier as thinking harder for greater precision across coding, research, data analysis, and document-heavy work. It should be positioned for difficult reasoning and professional-grade deliverables rather than routine chat.
Context Window
1.1M tokens
Maximum Output
128K tokens
Release Date
Apr 23, 2026
Modalities
GPT-5.5 Pro Pricing
| Input Price | Output Price |
|---|---|
| $30/M | $180/M |
GPT-5.5 Pro API Capabilities
Reasoning
Supported
Tool calling
Supported
Temperature parameter
Not supported
Attachments
Supported
Knowledge Base
2025-12-01
Endpoint Protocols
Completions API
GPT-5.5 Pro Model Highlights
GPT-5.5 Pro applies additional reasoning compute, a large context window and visual understanding to demanding professional problems.
Deeper Reasoning
Uses more compute than the standard GPT-5.5 model to produce more precise answers to difficult, reasoning-intensive questions.
Million-Token Context
Accepts up to 1,050,000 tokens of context, allowing evidence and constraints from very large inputs to be considered together.
Visual Reasoning
Accepts image inputs alongside text, enabling difficult questions to incorporate diagrams, screenshots and document pages.
GPT-5.5 Pro Use Cases
GPT-5.5 Pro is suited to difficult analytical work, large evidence reviews and decisions where response precision matters more than latency.
Complex Technical Analysis
Evaluates difficult engineering or scientific questions, reconciles competing constraints and produces a reasoned recommendation.
Large Evidence Review
Reviews extensive reports and supporting images, compares claims across sources and prepares traceable conclusions.
High-Precision Review
Checks complex plans, specifications or analyses for inconsistencies and returns a carefully reasoned revision.
How to Use GPT-5.5 Pro via the TokenHub API
import OpenAI from "openai"
const client = new OpenAI({
apiKey: process.env.TOKENHUB_API_KEY,
baseURL: "https://us-api.tokenhub.com/v1",
})
const result = await client.chat.completions.create({})
console.log(result.choices[0]?.message?.content)GPT-5.5 Pro Comparisons
GPT-5.5 Pro FAQ
GPT-5.5 Pro: capabilities, use cases, limits, and TokenHub guidance.
What is GPT-5.5 Pro built for?+
GPT-5.5 Pro is a OpenAI model for maximum-quality complex professional work.
When is GPT-5.5 Pro most useful?+
Best for complex coding, research and synthesis and professional documents and spreadsheets, especially when maximum answer quality is the priority.
What distinguishes GPT-5.5 Pro?+
Key strength: more test-time compute for smarter, more precise responses.
What should I watch for?+
The Pro variant is restricted to the Responses API and may take longer to finish. For speed and cost efficiency, consider GPT-5.5.
How do I check availability?+
Use the exact ID shown by TokenHub; follow your account docs and verify current features.
Ready to use GPT-5.5 Pro?
Use one API key to access GPT-5.5 Pro and more AI models through TokenHub.
Media and Discussions
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