TAU2
Measured May 14, 2026Source
Score
0.87
Models9 1 
GPT-5.4 Pro (xhigh)
OpenAIOpenAIUnited States
GPT-5.4 Pro (xhigh) is a high-performance variant of OpenAI's GPT-5 series, optimized for advanced reasoning, complex problem-solving, and extended context handling. It features enhanced multimodal capabilities and is designed for demanding enterprise and research applications.
CodingReasoningFastLong contextMultimodal
Input / 1M tokens
$30.00Output / 1M tokens
$180.00Supported plans
4Benchmark history
Evaluations
Terminalbench Hard
Measured May 14, 2026Source
Score
0.58
Lcr
Measured May 14, 2026Source
Score
0.74
Ifbench
Measured May 14, 2026Source
Score
0.76
Scicode
Measured May 14, 2026Source
Score
0.57
Hle
Measured May 14, 2026Source
Score
0.42
Gpqa
Measured May 14, 2026Source
Score
0.92
Artificial Analysis Coding Index
Measured May 14, 2026Source
Score
57.2
Artificial Analysis Intelligence Index
Measured May 14, 2026Source
Score
56.8
Plan availability
Products and plans that support this model
Apertis Coding Plan
Apertis Coding Plan
Apertis Coding Plan is a subscription-based AI coding service providing unified access to 30+ AI models (GPT-5.4, Claude Opus 4.6, Gemini 3.1 Pro, and more) through a single API key. Designed for developers using coding agents like Claude Code, Cursor, Cline, and OpenCode, it offers predictable monthly pricing, free prompt caching, auto-failover, and quota-based billing across OpenAI, Anthropic, Google, and other providers.
Discussion
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