GPT-5.5 specs, prices, where it runs and its benchmark standing

Name: GPT-5.5
Author: OpenAI

closed weights · #26 overall, podium score 5.0 · top 10 on 3 of 10 · released Apr 22, 2026

Provider: OpenAI
Release date: Apr 22, 2026; Boards
Parameters: Not disclosed by OpenAI
Modalities: Text, Image, Files to Text; OpenRouter
License: Proprietary; LMArena
Context window: 1.05M tokens; Pricing
Pricing: $5 in / $30 out per 1M tokens; All prices
Hosting: 7 priced API routes · Azure OpenAI (29 regions) · OpenRouter; Pricing Regions
Weights: Closed weights
Benchmarks: 10 boards captured, #26 overall

Rank	Board	Category	Score	Of
8	Search ArenaAgents and tools · as “GPT-5.5 (Search)”	Agents and tools	1,227	40
8	Document ArenaVision · as “GPT-5.5 (High)”	Vision	1,482	40
10	LiveBenchReasoning · as “gpt-5.5-xhigh”	Reasoning	80.2%	64
11	ARC-AGI-2Reasoning · as “GPT-5.5 (XHigh)”	Reasoning	85.0%	92
17	Epoch ECIReasoning · as “GPT-5.5”	Reasoning	160.0	100
18	Vision ArenaVision · as “GPT-5.5”	Vision	1,285	85
22	MCP AtlasAgents and tools · as “gpt-5.5 (xhigh)”	Agents and tools	75.3%	37
25	Text ArenaChat · as “GPT-5.5 (High)”	Chat	1,481	84
38	GPQA DiamondReasoning · as “gpt-5.5_low”	Reasoning	90.7%	100
54	WebDev ArenaCoding · as “GPT-5.5 (xHigh, Codex Harness)”	Coding	1,513	82

Versions and release history

11 versions in this line since May 28, 2023, from Pricing, OpenRouter and the boards.

Category ranks, more models and catalog changes