NOUMENOpen app
NOUMEN

OpenAI · Efficient

GPT 5 Mini

Added Aug 7, 2025

Compare models

Choose up to 3 models to compare.1 of 3 chosen

Loading models…

Use in the app

A lightweight version of GPT-5 for cost-sensitive applications. Balances advanced capabilities with efficient resource usage.

  • Reasoning
  • Vision
Input
Text, Images
Output
Text
Reasoning effort
minimal · low · medium · high
Discovery tier
Efficient

Pricing

USD per 1M tokens
Input
$0.25
Output
$2.00
Cache read
$0.025

Reference prices as published by the model provider. API example

Specifications

Context window
400K
Max output
128K
Average output (7 days)
891 tokens
Longer than 67% of 465 models

Side by side

GPT 5 Mini compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

Compare models

Choose up to 3 models to compare.1 of 3 chosen

Loading models…

GPT 5 MiniOpenAIThis modelGPT 6.1 Sol ProOpenAIRemove
ProviderOpenAIOpenAI
Discovery tierEfficientFrontier
AddedAug 7, 2025Sep 29, 2026
Limits
Context window400K1.05MBest
Max output128K128K
Average output891 tokens1.2K tokens
Pricing, USD per 1M tokens
Input$0.25Best$2.00
Output$2.00Best$10.00
Cache read$0.025Best$0.10
Cache write—$2.50
Performance
Request success (24h)100.0%100.0%
Benchmark indexes
Intelligence Index16.8—
Coding Index15.6—
Math Index90.7—
Capabilities
ReasoningYesYes
ToolsNoYes
VisionYesYes
Structured outputNoYes
PDF inputNoYes
Reasoning effortminimal, low, medium, highlow, medium, high, xhigh, max

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • GPT 5 Mini
  • GPT 6.1 Sol Pro

Intelligence Index

  • GPT 5 Mini16.8
  • GPT 6.1 Sol Pro—

GPT 5 Mini tested at high reasoning effort

GPT 5 Mini: Better than 45% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Coding Index

    Composite of the coding evaluations

    • GPT 5 Mini: 15.6
    • GPT 6.1 Sol Pro: —

  • Math Index

    Composite of the math evaluations

    • GPT 5 Mini: 90.7
    • GPT 6.1 Sol Pro: —

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • GPT 5 Mini: 6.5%
    • GPT 6.1 Sol Pro: —

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • GPT 5 Mini: 0.9%
    • GPT 6.1 Sol Pro: —

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • GPT 5 Mini: 428 Elo
    • GPT 6.1 Sol Pro: —

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • GPT 5 Mini: 766 Elo
    • GPT 6.1 Sol Pro: —

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • GPT 5 Mini: 8.4%
    • GPT 6.1 Sol Pro: —

  • AA-LCRv1.1

    Reasoning across long documents

    • GPT 5 Mini: 72.3%
    • GPT 6.1 Sol Pro: —

  • MLCR-AA

    Long-context reasoning over medical records

    • GPT 5 Mini: 8.9%
    • GPT 6.1 Sol Pro: —

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • GPT 5 Mini: 21.5%
    • GPT 6.1 Sol Pro: —

  • GPQA Diamond

    Graduate-level science questions

    • GPT 5 Mini: 82.8%
    • GPT 6.1 Sol Pro: —

  • MMLU-Pro

    Multi-subject knowledge and reasoning

    • GPT 5 Mini: 83.7%
    • GPT 6.1 Sol Pro: —

  • IFBench

    Following precise output instructions

    • GPT 5 Mini: 75.4%
    • GPT 6.1 Sol Pro: —

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • GPT 5 Mini: 0.0%
    • GPT 6.1 Sol Pro: —

  • SciCode

    Scientific computing in Python

    • GPT 5 Mini: 39.0%
    • GPT 6.1 Sol Pro: —

  • LiveCodeBench

    Recent competitive programming problems

    • GPT 5 Mini: 83.8%
    • GPT 6.1 Sol Pro: —

Math

  • AIME 2025

    Competition mathematics, 2025 problems

    • GPT 5 Mini: 90.7%
    • GPT 6.1 Sol Pro: —

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • GPT 5 Mini: 33.3%
    • GPT 6.1 Sol Pro: —

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • GPT 5 Mini: 68.4%
    • GPT 6.1 Sol Pro: —

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • GPT 5 Mini: 72.3%
    • GPT 6.1 Sol Pro: —

Scores from Artificial Analysis, updated Oct 26, 2026. GPT 5 Mini was tested at high reasoning effort; compare scores measured at the same effort.Artificial Analysis

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Prompt cache hits
22.1%
About $0.20 per 1M input tokens with caching
Request success (24h)
100.0%
Reliable

Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.

Hourly request success · last 72 hoursLowest hour 100.0%
  • Healthy (98% or more)
  • Degraded (90–98%)
  • Down (under 90%)
  • No requests

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5-mini",
    "reasoning_effort": "medium",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="openai/gpt-5-mini",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

OpenAI

Other OpenAI models, starting with the same family.