LLM Comparison

GPT-5.5 Pro vs GPT-5.4

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
Organization	OpenAI	OpenAI
OpenTools Score	97 0.9	74 8.4
Family	GPT	GPT
Status	Current	Current
Release Date	Apr 2026	Mar 2026
Context Window	1.1M tokens	1.1M tokens
Input Price	$30.00/M tokens	$2.50/M tokens
Output Price	$180.00/M tokens	$15.00/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: $0.2500/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`
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	82.7openai
GeneBench	33.2openai	—
GDPval	82.3openai	—
Investment Banking Modeling	88.6openai	—
GPQA Diamond	—	93openai
SWE-bench Pro	—	57.7openai
OSWorld-Verified	—	75openai
Terminal-Bench 2.0	—	75.1openai
ARC-AGI-2	—	73.3openai
MMMU-Pro	—	81.2openai
MATH-500	—	94.6openai
	View GPT-5.5 Pro	View GPT-5.4

Cost Calculator

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Input tokens / month

Output tokens / month

Model	Input	Output	Total / mo	vs Best
GPT-5.4Cheapest	$2.50	$7.50	$10.00	—
GPT-5.5 Pro	$30.00	$90.00	$120.00	+1100%

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

GPT-5.4 is a multimodal llm from OpenAI. Supports up to 1,050,000 token context window. Available from $2.50/M input tokens.