LLM Comparison

GPT-5.5 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	GPT-5.4 Mini
Organization	OpenAI	OpenAI
OpenTools Score	90 5.1	46 17.6
Family	GPT	GPT
Status	Current	Current
Release Date	Apr 2026	Mar 2026
Context Window	1.1M tokens	400K tokens
Input Price	$5.00/M tokens	$0.75/M tokens
Output Price	$30.00/M tokens	$4.50/M tokens
Pricing Notes	Cached input: $0.50/M tokens. Long context (>272K tokens): 2x input, 1.5x output. Batch API: 50% discount. Priority: 2.5x standard.	Cache read: $0.0750/M tokens
Capabilities	textvisioncodetool-useextended-thinkingcomputer-useweb-search	textvisioncode
Training Cutoff	December 2025	—
Max Output	128K tokens	128K tokens
API Identifier	`openai/gpt-5.5`	`openai/gpt-5.4-mini`
Benchmarks
MMLU	92.4openai	—
GPQA Diamond	93.6openai	88openai
ARC-AGI-2	85openai	—
Terminal-Bench 2.0	82.7openai	60openai
SWE-bench Pro	58.6openai	54.4openai
OSWorld-Verified	78.7openai	72.1openai
BrowseComp	84.4openai	—
MMMU-Pro	81.2openai	76.6openai
FrontierMath Tier 4	35.4openai	—
HLE (with tools)	52.2openai	—
GDPval	84.9openai	—
Toolathlon	55.6openai	—
CyberGym	81.8openai	—
MRCR v2 512K-1M	74openai	—
	View GPT-5.5	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	$5.00	$15.00	$20.00	+567%

OpenAI

GPT-5.5

GPT-5.5 is OpenAI's smartest and most intuitive model, built for agentic work like coding, research, and data analysis. It matches GPT-5.4 per-token latency while delivering higher intelligence with significantly fewer tokens. Supports a 1,050,000 token context window and five reasoning effort levels (none through xhigh).

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.