LLM Comparison

Claude Sonnet 4.6 vs GPT-5.4 Pro

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

Price vs Intelligence

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2/6 models

Same tier:

	Claude Sonnet 4.6	GPT-5.4 Pro
Organization	Anthropic	OpenAI
OpenTools Score	48 5.3	82 0.8
Family	Claude	GPT
Status	Current	Current
Release Date	Feb 2026	Mar 2026
Context Window	1.0M tokens	1.1M tokens
Input Price	$3.00/M tokens	$30.00/M tokens
Output Price	$15.00/M tokens	$180.00/M tokens
Pricing Notes	Cache read: $0.3000/M tokens	OpenAI's GPT-5.4 Pro model page lists $30 input and $180 output per 1M tokens. Prompts over 272K input tokens cost 2x input and 1.5x output for the full session (standard, batch and flex). Regional processing adds 10%.
Capabilities	textvisioncodetool-use	textvisioncode
Training Cutoff	—	Aug 31, 2025
Max Output	128K tokens	128K tokens
API Identifier	`anthropic/claude-sonnet-4.6`	`openai/gpt-5.4-pro`
Benchmarks
MMLU	86.7anthropic	—
GPQA Diamond	89.9anthropic	93openai
SWE-bench Verified	72.5anthropic	—
Terminal-Bench 2.0	51anthropic	—
MATH 500	54.2anthropic	—
LiveCodeBench	41.5anthropic	—
Berkeley Function Calling	88.3anthropic	—
HLE	30openrouter	—
GPQA-AA Elo	1674artificial-analysis	—
SWE-bench Pro	—	57.7openai
MATH-500	—	94.6openai
	View Claude Sonnet 4.6	View GPT-5.4 Pro

Cost Calculator

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Input tokens / month

Output tokens / month

Model	Input	Output	Total / mo	vs Best
Claude Sonnet 4.6Cheapest	$3.00	$7.50	$10.50	—
GPT-5.4 Pro	$30.00	$90.00	$120.00	+1043%

Anthropic

Claude Sonnet 4.6

Claude Sonnet 4.6 is a multimodal llm from Anthropic. Supports up to 1,000,000 token context window. Achieves 88.0% on MMLU. Available from $3.00/M input tokens.

OpenAI

GPT-5.4 Pro

GPT-5.4 Pro is a multimodal llm from OpenAI. Supports up to 1,050,000 token context window. Available from $30.00/M input tokens.