Which is cheaper, GPT-4o Mini or o4-mini?

GPT-4o Mini is cheaper for both input ($0.15/M tokens) and output ($0.60/M tokens), compared to o4-mini at $1.10/$4.40 per million tokens.

Which is faster, GPT-4o Mini or o4-mini?

GPT-4o Mini is faster at 120 tokens/sec with a TTFT of 180ms, compared to o4-mini at 60 tokens/sec and 1200ms TTFT.

Which has a bigger context window, GPT-4o Mini or o4-mini?

o4-mini has a 200K token context window, which is larger GPT-4o Mini's 128K context window.

Which is better for coding, GPT-4o Mini or o4-mini?

o4-mini has a higher coding ELO of 1380 compared to GPT-4o Mini's 1200, making it the stronger choice for code generation and programming tasks.

GPT-4o Mini vs o4-mini for Chatbot (2026)

Which model is better for conversational AI, customer support, and chat applications? We compare GPT-4o Mini and o4-mini with a focus on chatbot performance.

Verdict

For chatbot, o4-mini edges out GPT-4o Mini with a arenaElo score of 1260 vs 1220. However, GPT-4o Mini may still be the better choice if pricing or specific capabilities matter more for your conversational AI, customer support, and chat applications.

Side-by-Side Comparison

Feature	GPT-4o Mini	o4-mini
Provider	OpenAI	OpenAI
Input Price / 1M tokens	$0.150	$1.10
Output Price / 1M tokens	$0.600	$4.40
Context Window	128K	128K
Max Output Tokens	16,384	32,768
Arena ELO	1,220	1,260
Coding ELO	1,200	1,270
TTFT (ms)	180	180
Tokens/sec	120	105
Multimodal	Yes	No
JSON Mode	Yes	Yes
Function Calling	Yes	Yes
Vision	Yes	No

When to Use GPT-4o Mini

Choose GPT-4o Mini when you need: extremely affordable pricing, fast response times, strong for its price tier, good multimodal support. It excels at chatbots, lightweight-tasks, cost-sensitive tasks. It is also the more cost-effective option between the two.

Strengths:

Extremely affordable pricing
Fast response times
Strong for its price tier
Good multimodal support

Best for:

chatbotslightweight-taskscost-sensitive

When to Use o4-mini

Choose o4-mini when you need: excellent reasoning and math capabilities, strong coding performance, affordable for a reasoning model, large output window. It excels at reasoning, math, coding, science tasks. Its 200K context window is larger, making it better for long-document processing.

Strengths:

Affordable
Fast
Good reasoning

Best for:

general-purposereasoningcoding

GPT-4o Mini vs o4-mini for Chatbot (2026)

Side-by-Side Comparison

Frequently Asked Questions

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