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GPT-5 Mini vs GPT-4o-mini

Detailed technical comparison between GPT-5 Mini (OpenAI) and GPT-4o-mini (OpenAI). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.

⚡ Executive Summary & Verdict

Comparison Snapshot

GPT-5 Mini: 6 WinsvsGPT-4o-mini: 0 Wins
Context Leader

GPT-5 Mini

400,000 tokens
Agentic Tool-Calling

GPT-5 Mini

85/100 Score
Lowest Latency (TTFT)

GPT-4o-mini

150 ms TTFT
Input Price Leader

GPT-4o-mini

$0.15 / MTok
OpenAIactive

GPT-5 Mini

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....

View GPT-5 Mini Full Specs →
OpenAIactive

GPT-4o-mini

GPT-4o mini is OpenAI's newest model after [GPT-4 Omni](/models/openai/gpt-4o), supporting both text and image inputs with text outputs. As their most advanced small model, it is many multiples more affordable...

View GPT-4o-mini Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationGPT-5 MiniGPT-4o-mini
ProviderOpenAIOpenAI
Context Window400,000 tokens🏆128,000 tokens
Agent Suitability85/100 (est.)🏆82/100 (est.)
Time to First Token (TTFT)180 ms (est.)150 ms (est.)🏆
Deployment Modelmanaged apimanaged api
Production StabilityStable GA (est.)Stable GA (est.)
API AvailableYesYes
Released Date2025-08-072024-07-18

API Pricing Comparison

Input Price per Million Tokens

GPT-5 Mini

$0.25

GPT-4o-mini

$0.15

Output Price per Million Tokens

GPT-5 Mini

$2.00

GPT-4o-mini

$0.60

💡 Cost Ratio: GPT-4o-mini is 1.7x cheaper per input token than GPT-5 Mini.

Want to test both models live?

Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.

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Benchmark Performance Metrics

Standardized Scores (0–100%)

Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.

MMLUGeneral knowledge & multi-task understanding
86.5%vs82.0%+4.5% GPT-5 Mini
GPT-5 Mini 🏆
GPT-4o-mini
HumanEvalPython coding & logic synthesis
88.0%vs84.0%+4.0% GPT-5 Mini
GPT-5 Mini 🏆
GPT-4o-mini
MATHComplex mathematical problem solving
82.5%vs70.2%+12.3% GPT-5 Mini
GPT-5 Mini 🏆
GPT-4o-mini
GPQAGraduate-level expert reasoning
68.0%vs45.0%+23.0% GPT-5 Mini
GPT-5 Mini 🏆
GPT-4o-mini
HellaSwagCommonsense reasoning and inference
95.5%vs84.7%+10.8% GPT-5 Mini
GPT-5 Mini 🏆
GPT-4o-mini
MT-BenchMulti-turn conversation flow quality
9.0%vs8.6%+0.4% GPT-5 Mini
GPT-5 Mini 🏆
GPT-4o-mini

GPT-5 Mini Quirks & Gotchas

  • ▸Excellent for high-frequency classification and routing tasks
  • ▸Tool calling reliability drops on complex multi-step chains — use GPT-5 for agentic workflows

GPT-4o-mini Quirks & Gotchas

  • ▸Ultra-low latency — best TTFT in the OpenAI lineup
  • ▸Tool calling limited to single-step — not suitable for complex agentic pipelines

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