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GPT-5.5 Pro pricing & benchmarks

GPT-5.5 Pro is available from OpenAI at $30.00 per million input tokens and $180.00 per million output tokens ($67.50 blended at 3:1). It accepts up to 1,050,000 tokens of context. 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...

Pricing
Per million tokens · OpenRouter
Input$30.00
Output$180.00
Blended (3:1)$67.50
Specification
openai/gpt-5.5-pro
Context window1.1M
Max output128K
ReleasedApr 2026
LicenceProprietary
Modalitiesin:text, in:image, in:file, out:text
Benchmarks
Independently run — not vendor self-reports. Every score links its source.
BenchmarkScoreConfigRunSource
FrontierMath T1–3 87.7% ±1.9 — 2026-06-12 Independently run · Epoch AI
FrontierMath T4 78.0% ±6.5 — 2026-06-12 Independently run · Epoch AI
Scores published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0.
Where to run GPT-5.5 Pro
2 options across 1 provider · 2.0× between cheapest and dearest. Blended at 3:1. ⚠ marks an option serving less context than the best available, or re-pricing above a prompt-length threshold. Bracketed labels are the provider's own service tier or region.
HostBlended $/1MIn / OutContextUptime 24h
OpenAI (flex)
⚠ re-prices above 272K prompt tokens ($30.00/$135.00)
 $33.75 $15.00 / $90.00 1.1M 100.0%
OpenAI
⚠ re-prices above 272K prompt tokens ($60.00/$270.00)
 $67.50 $30.00 / $180.00 1.1M 100.0%
Host prices and uptime from OpenRouter, synced 2026-08-08.
Compare GPT-5.5 Pro
GPT-5.5 Pro vs Qwen3.8 Max GPT-5.5 Pro vs DeepSeek V4 Flash 0731 GPT-5.5 Pro vs Claude Opus 5 GPT-5.5 Pro vs Gemini 3.6 Flash GPT-5.5 Pro vs Kimi K3 GPT-5.5 Pro vs Grok 4.5 GPT-5.5 Pro vs Claude Sonnet 5 GPT-5.5 Pro vs GLM 5.2
FAQ
How much does GPT-5.5 Pro cost?
GPT-5.5 Pro costs $30.00 per million input tokens and $180.00 per million output tokens on OpenRouter. At a 3:1 input:output mix that blends to $67.50 per million tokens.
What is GPT-5.5 Pro's context window?
GPT-5.5 Pro accepts up to 1,050,000 tokens of context, and can generate up to 128,000 output tokens.