GPT-5.5 Pro
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...
Input / 1M
$30.00
Output / 1M
$180.00
Context
1.0M
AA Intelligence
—
Closed weights — available only as a hosted API
file + image + text → text
Knowledge cutoff Dec 2025
View on OpenRouter ↗
Pricing
via OpenRouter · USD per 1M tokens · synced 2026-10-24$30.00
input / 1M
$180.00
output / 1M
—
cached input / 1M
$210.00
1M in + 1M out
:batch variant
$15.00 in · $90.00 out
Price tiers
- Above 272K prompt tokens: input $60.00/M, output $270.00/M (2× base)
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Providers
- 1
- Cheapest provider
- OpenAI · $15.00 / $90.00
- Best throughput
- —
- AA Intelligence / Coding / Agentic
- — / — / —
✓ Tool calling
✓ Reasoning
✓ Structured outputs
✓ Image input
✓ File input
✗ Audio input
✗ Prompt caching
Price history
tracking started — chart appears after 7 days of snapshots (6 recorded)Current: $30.00 input · $180.00 output per 1M tokens
Providers
1 provider · per 1M tokens · last 30 min metrics| Provider | Quant | Context | Input | Output | Uptime | Tok/s |
|---|---|---|---|---|---|---|
| OpenAI | unknown | 1.0M | $15.00 | $90.00 | — | — |
| OpenAI | unknown | 1.0M | $30.00 | $180.00 | 100% | — |
Provider data from OpenRouter's endpoint listing, refreshed daily.
Specifications
- Organisation
- openai
- Released on OpenRouter
- 2026-04-24
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Input
- file, image, text
- Output
- text
- Knowledge cutoff
- December 2025
- Tokenizer
- GPT
- Moderated by provider
- Yes
- OpenRouter id
- openai/gpt-5.5-pro
Compare with
Popular comparisons
Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.