GPT-5.5 Pro
Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding
Context
1,050,000
Max output
128,000
Input / 1M
$27.27
Output / 1M
$163.64
Providers
18
01Profile
Profile
Released
2026-04-23
Last updated
2026-04-24
Knowledge cutoff
2025-12-01
Weights
Closed
02Capabilities
Capabilities
Input
text · image · pdf
Output
text
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Attachments
Yes
Cache read
Not listed
Cache write
Not listed
03Pricing
Pricing across 18 providers
Per 1M tokens, USD. Sorted by input price. First-party row highlighted.
04History
Change history
12+ recent events since 2026-04-23
2026-08-27ContextorcarouterMax output—→ 100,000
2026-08-27Price uprequestyinput / 1M$27.00→ $30.00
2026-08-27Price uprequestyoutput / 1M$162.00→ $180.00
2026-08-24Contextcloudflare-ai-gatewayContext window—→ 1,000,000
2026-08-23Addedopperoffering→ new
2026-08-20Addedllmgateway-providersoffering→ new
2026-08-20Price cutrequestyinput / 1M$30.00→ $27.00
2026-08-20Price cutrequestyoutput / 1M$180.00→ $162.00
2026-08-18Addedrequestyoffering→ new
2026-08-14Addedcloudflare-ai-gatewayoffering→ new
2026-08-14Addededenaioffering→ new
2026-08-07Price upneoninput / 1M—→ $30.00