Compare AI models

Specifications
Parameters
—125B
Context window
—262k
API pricing
Input price
$30.00—
Output price
$180.00—
Cheapest input
$15.00OpenAI—
Cheapest output
$90.00OpenAI—
Benchmarks
Humanity's Last Exam · with tools
58.7%35.9%
GPQA Diamond
94.4%91.7%
Overview
CompanyOpenAIQwen
Release dateMar 5 2026Aug 26 2026
AccessClosedOpen Weight
Model detailsView modelView model

Frequently asked questions

GPT-5.4-Pro leads Qwen3.8-Flash-Next on 2 of the 2 benchmarks they both report (Humanity's Last Exam, GPQA Diamond). Only GPT-5.4-Pro has a verified first-party API price: $30.00 per million input tokens and $180.00 per million output tokens. No pay-as-you-go API rate is tracked for Qwen3.8-Flash-Next. GPT-5.4-Pro shipped 174 days before Qwen3.8-Flash-Next, so benchmark comparisons should account for the intervening progress.

GPT-5.4-Pro is closed, while Qwen3.8-Flash-Next is open weight.

On Humanity's Last Exam · with tools, GPT-5.4-Pro leads at 58.7% vs Qwen3.8-Flash-Next at 35.9%. On GPQA Diamond, GPT-5.4-Pro leads at 94.4% vs Qwen3.8-Flash-Next at 91.7%.