GPT 5.5 via the Tokenator API

What the model is for

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks.

Specification

Benchmarks

Artificial Analysis data loaded into the catalog for this model.

Upstream providers

A request goes to the first available provider by priority; if it fails, Tokenator switches to the next one.

Example request

curl https://api.tokenator.top/v1/chat/completions \
  -H "Authorization: Bearer sk-your-tokenator-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Compatible tools

The model can be used in any tool that accepts a custom base URL: Claude Code, Codex CLI, OpenCode, Cursor, Cline, Kilo Code, OpenClaw.

See also

Comparisons involving this model: Claude Opus 4.6 vs GPT 5.5, Deepseek V4 Flash vs GPT 5.5, Gemini 3.6 Flash vs GPT 5.5, GPT 5.5 vs Grok 4.5, GPT 5.5 vs Kimi K3.