Model Comparison

GPT-5.4 (Xhigh)
vs. Claude Fable 5.2 (Max, Default Fallback)

GPT-5.4 (Xhigh) has not been available at LLMBase since 26 October 2026. Open alternative: DeepSeek V4 Pro →

Comparing 2 AI models · 0 benchmarks · OpenAI, Anthropic

Recommended Pick

GPT-5.4 (Xhigh)5 metric wins

Strongest on: Input price, Output price, Blended price

Lowest Price

GPT-5.4 (Xhigh)

$2.50/1M input price

Differences That Matter

Price gap

GPT-5.4 (Xhigh) is 3.2x cheaper on input tokens than Claude Fable 5.2 (Max, Default Fallback).

Speed gap

Claude Fable 5.2 (Max, Default Fallback) generates about 1.1x as many tokens per second as GPT-5.4 (Xhigh).

Top-pick rationale

GPT-5.4 (Xhigh) wins 5 measurable categories, including Input price, Output price, Blended price, TTFT.

Live compare

Response Face-Off

Run one prompt through the selected models and compare response quality with live speed and cost context.

10 comparisons left in 24h

GPT-5.4 (Xhigh)

OpenAI

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Claude Fable 5.2 (Max, Default Fallback)

Anthropic

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Full Comparison

Metric	Top Pick Op GPT-5.4 (Xhigh) OpenAI	An Claude Fable 5.2 (Max, Default Fallback) Anthropic
Pricing per 1M tokens
Input Cost	$2.50/1M	$8.00/1M
Output Cost	$15.00/1M	$40.00/1M
Blended (3:1)	$5.63/1M	$16.00/1M
Specifications
Organization	OpenAI	Anthropic
Release Date	Mar 5, 2026	Nov 9, 2026
Performance & Speed
Throughput	87.1 tok/s	94.0 tok/s
TTFT	205170ms	249300ms
Latency	205170ms	249300ms
Composite Indices
Value Score	—	100.0
Reasoning Score	—	64.6
Intelligence	—	64.6