GPT-5.5 Pro pricing & benchmarks
Released Apr 24, 2026 · served by 1 provider
What GPT-5.5 Pro is
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
- Model ID:
openai/gpt-5.5-pro - Modality: text+image+file->text
- Knowledge cutoff: 2025-12-01
- Tool calling: supported · Structured output: supported
Providers and prices for GPT-5.5 Pro
The same model costs different amounts depending on who serves it. Prices are per 1M tokens, cheapest first. Uptime and throughput are OpenRouter's rolling measurements, not vendor claims.
| Provider | Input | Output | Context | Quant | Uptime 24h | Throughput |
|---|---|---|---|---|---|---|
| OpenAIcheapest | $15.00 | $90.00 | 1.1M | — | 100.0% | — |
FAQ
How much does the GPT-5.5 Pro API cost?
$15.00 per 1M input tokens and $90.00 per 1M output tokens. A typical workload of 1M input + 300K output tokens costs about $42.00.
Is GPT-5.5 Pro free?
No. It is a paid model starting at $15.00 per 1M input tokens, though some providers offer trial credits.
Which provider is cheapest for GPT-5.5 Pro?
OpenAI at $15.00 input / $90.00 output per 1M tokens.
Can I self-host GPT-5.5 Pro?
No. GPT-5.5 Pro is closed-weight and only available through hosted APIs.