GPT-5.5 API
$4.500 - 9.000(~ 306 - 612 credits) per 1M input tokens; $27.000 - 40.500(~ 1836 - 2754 credits) per 1M output tokens
$0.450 - 0.900(~ 30.6 - 61.2 credits) per 1M cache read tokens
Highest stability with guaranteed 99.9% uptime. Recommended for production environments.
Use the same API endpoint for all versions. Only the model parameter differs.
GPT-5.5 API with EvoLink Pricing & Advanced Reasoning
Access GPT-5.5 on EvoLink with OpenAI-compatible integration, advanced reasoning capabilities, 1M context, 128K max output, and a clear GPT-5.5 pricing path for production teams.
How GPT-5.5 Compares on EvoLink
A quick buyer-focused comparison across frontier models available behind one EvoLink API key.
| Metric | GPT-5.5 | Claude Opus 4.7 | Gemini 3.1 Pro |
|---|---|---|---|
| Context Window | 1M | 200K (1M beta) | 1M |
| Max Output | 128K | 128K | 64K |
| Native Computer Use | Yes | No | No |
| Tool Search | Yes | No | No |
| Reasoning Controls | none to xhigh | standard / extended | limited public controls |
| EvoLink Input | $4.00 / 1M | $4.50 / 1M | $1.60 / 1M |
| EvoLink Output | $24.00 / 1M | $22.50 / 1M | $12.00 / 1M |
What Can You Build with GPT-5.5?
Next-generation reasoning for complex problem solving
Build GPT-5.5 applications for complex multi-step reasoning tasks, research workflows, and decision-support agents. EvoLink gives developers an OpenAI-compatible way to test and deploy GPT-5.5 behind one API key.
Full-codebase analysis and code generation with 1M context
Process large repositories, long documents, or research sets in a single request. GPT-5.5 provides 1M context, making code analysis and generation practical through EvoLink.
Enterprise tool orchestration with Tool Search
Use GPT-5.5 for workflows that need many tools, internal APIs, or MCP connectors. Tool Search helps the model select the right tools on demand instead of loading everything into every prompt, which improves agent quality and lowers token waste.
Why Use GPT-5.5 Through EvoLink?
Get GPT-5.5 with EvoLink pricing, one API key, and a deployment path that stays OpenAI-compatible.
EvoLink pricing for production use
EvoLink lists GPT-5.5 pricing directly on the model page, so you can estimate production costs before routing real workloads.
OpenAI-compatible migration path
For most teams, moving an OpenAI-style integration to EvoLink is a base URL, API key, and model-routing change rather than a platform rewrite.
One key across GPT, Claude, and Gemini
Use one EvoLink API key to access GPT-5.5 plus other frontier models. That makes it easier to compare vendors, add fallbacks, and route traffic without multiplying integration work.
How to Integrate
Three steps from key creation to production monitoring.
Get your API key
Sign up on EvoLink, generate your API key, and use it immediately with GPT-5.5 and 47+ other models.
Send your request
POST with model set to "gpt-5.5", your messages array, and optional parameters.
Deploy and monitor
Track usage, costs, and reasoning-token consumption in the EvoLink dashboard and scale workflows when ready.
Key GPT-5.5 Features
The core capabilities that make GPT-5.5 a strong fit for production agents, coding systems, and enterprise workflows.
1M Context Window
Process large codebases and long documents in one request.
128K Max Output
Generate complete reports and long implementations in one response.
Advanced Reasoning
Advanced reasoning capabilities for complex multi-step problems.
Tool Search
Agents can identify and use the right tools in larger ecosystems without overloading every prompt.
Adjustable Reasoning
Choose reasoning effort from none to xhigh based on latency, depth, and task difficulty.
Better Token Efficiency
Designed for demanding workflows where reasoning depth and context handling matter.
Frequently Asked Questions
Everything you need to know about the product and billing.
GPT Model Family
Switch between GPT family models with one API key and the same deployment surface.
Further Reading
Supporting blog coverage for pricing analysis, comparisons, and release context.