openai/gpt-5.4GPT-5.4 is OpenAI’s proprietary AI model, released Mar 5, 2026. It costs $2.50/M input and $15/M output tokens, and handles a 1.1M-token context window. Its strongest use case is math, where it ranks in the 88th percentile of the models Model Beat tracks.
GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system.
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.4 lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Graduate-level scientific reasoning
Frontier of human expert knowledge
Factual accuracy & hallucination
Novel ML problem-solving
Code performance optimization
Scientific research coding
Real GitHub issue resolution
Human-rated web development
Olympiad-qualifier math
Research-level math problems
Hardest research math
Multi-step agentic tasks
Autonomous task length
Command-line agentic tasks
Tool-agent-user reliability
GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system.
GPT-5.4 is an AI model developed by OpenAI, part of the GPT family, released Mar 5, 2026.
GPT-5.4's list price from OpenAI is $2.50 per million input tokens and $15 per million output tokens.
GPT-5.4 supports a context window of up to 1.1M tokens.
On standardized evaluations tracked by Epoch AI, GPT-5.4 scores 56.6% on SciCode, 81.8% on Terminal-Bench, 93.3% on GPQA Diamond.
GPT-5.4 is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 30, 2026.