LLM Comparison

GPT-5.5 Pro vs GPT-5.4 Mini

Side-by-side specs, pricing & capabilities · Updated April 2026

Price vs Intelligence

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2/6 models

Same tier:

	GPT-5.5 Pro	GPT-5.4 Mini
Organization	OpenAI	OpenAI
OpenTools Score	97 0.9	46 17.6
Family	GPT	GPT
Status	Current	Current
Release Date	Apr 2026	Mar 2026
Context Window	1.1M tokens	400K tokens
Input Price	$30.00/M tokens	$0.75/M tokens
Output Price	$180.00/M tokens	$4.50/M tokens
Pricing Notes	No cached input discount. Long context (>272K tokens): 2x input, 1.5x output. Batch API: 50% discount. Regional processing: 10% uplift.	Cache read: $0.0750/M tokens
Capabilities	textvisioncodetool-useextended-thinkingweb-search	textvisioncode
Training Cutoff	December 2025	—
Max Output	128K tokens	128K tokens
API Identifier	`openai/gpt-5.5-pro`	`openai/gpt-5.4-mini`
Benchmarks
FrontierMath Tier 4	39.6openai	—
FrontierMath Tier 1-3	52.4openai	—
HLE (with tools)	57.2openai	—
HLE (no tools)	43.1openai	—
BrowseComp	90.1openai	—
GeneBench	33.2openai	—
GDPval	82.3openai	—
Investment Banking Modeling	88.6openai	—
GPQA Diamond	—	88openai
SWE-bench Pro	—	54.4openai
OSWorld-Verified	—	72.1openai
Terminal-Bench 2.0	—	60openai
MMMU-Pro	—	76.6openai
	View GPT-5.5 Pro	View GPT-5.4 Mini

Cost Calculator

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Input tokens / month

Output tokens / month

Model	Input	Output	Total / mo	vs Best
GPT-5.4 MiniCheapest	$0.75	$2.25	$3.00	—
GPT-5.5 Pro	$30.00	$90.00	$120.00	+3900%

OpenAI

GPT-5.5 Pro

GPT-5.5 Pro uses more compute to think harder and provide consistently better answers than GPT-5.5. Designed for the toughest problems, some requests may take several minutes. It excels at FrontierMath Tier 4 (39.6%) and BrowseComp (90.1%), offering the highest intelligence available from OpenAI at a premium price point.

OpenAI

GPT-5.4 Mini

GPT-5.4 Mini is a multimodal llm from OpenAI. Supports up to 400,000 token context window. Available from $0.75/M input tokens.