OpenAI · Frontier
gpt-5.5-pro
A closed model, reached through gm. The route is sealed in transit and in use; the model maker still receives the prompt under its API terms.
- Tool calling: yes
- Image input: yes
Released
Apr 2026Knowledge cutoff
Dec 2025Modalities
Text · Tool calling · Image inputBest price on gm
In
Cached
Out
per Mtok*
Recent effective price
What buyers have actually paid on this model recently, across every provider and cache hits.
Input
$21.21
$30.00Cached input
up to $3.00
Output
$127.26
$180.00How the effective price is calculated
Requests are load balanced across every provider serving this model, each offering its own rate, so what you pay is a blend rather than a single number. These are the blended rates actually paid — priced at what a provider offered, capped at list.
Measured over 168 windows: 13 requests and 55 input-side tokens, short of the 2,000,000 tokens the window walks for. Most recent window closed 2026-08-10 16:47 UTC.
Who's serving this model
Every provider currently serving this model, ranked by discount.
No provider is currently serving this model.
Performance
Measured on the requests gm routed to this model.
Nothing has been measured for this model yet. Throughput and latency are recorded on streaming requests, and the success rate once any request completes.
No requests were served on this model across the last 12 windows.
Benchmarks
Fixed-seed suites gm runs against this model.
No benchmark run has been published for this model.