OpenAI: GPT-5 Mini

OpenAI: GPT-5 Mini

openai · Released Aug 7, 2025
80
Our Score

GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks. It provides the same instruction-following and safety-tuning benefits as GPT-5, but with reduced latency and cost. GPT-5 Mini is the successor to OpenAI's o4-mini model.

$0.25 / 1M Input Price
$2.00 / 1M Output Price
400,000 tokens Context Window
128,000 tokens Max Output

Capabilities

Tool Use Function Calling Vision

Architecture

ModalityText + Image + File → Text
TokenizerGPT

Performance Indices

Source: Artificial Analysis

41.2 Intelligence Index
35.3 Coding Index
50.9 Agentic Index
90.7 Math Index

Benchmark Scores

Evaluations

GPQA Diamond 82.8%
Graduate-level scientific reasoning
HLE 19.7%
Humanity's Last Exam
MMLU Pro 83.7%
Multi-task language understanding
LiveCodeBench 83.8%
Live coding evaluation
SciCode 39.2%
Scientific computing
AIME 2025 90.7%
Competition mathematics (2025)
IFBench 75.4%
Instruction following
LCR 68%
Long-context reasoning
TerminalBench Hard 33.3%
Agentic terminal tasks
τ²-Bench 68.4%
Conversational agent benchmark

Benchmark data from Artificial Analysis and Hugging Face

Model Information

OpenRouter ID openai/gpt-5-mini
Provideropenai
Release Date August 7, 2025
Context Length400,000 tokens
Max Completion128,000 tokens
Status Active

Pricing

Token Type Cost per 1M tokens Cost per 1K tokens
Input $0.25 $0.000250
Output $2.00 $0.002000

Live Performance

Live endpoint metrics — refreshed every 30 minutes.

99.6%
Avg Uptime
7,876ms
Best Latency (TTFT)
77 tok/s
Best Throughput
2/2
Active Endpoints
Available via: OpenAI, Azure