Question 1

Is o4-mini good enough for most tasks?

Accepted Answer

Yes -- o4-mini outperforms GPT-4o on overall quality (Arena ELO 1350 vs 1260) and coding (Coding ELO 1380 vs 1265), while costing 78% less. The main limitation is latency: o4-mini has a 1200ms time-to-first-token vs GPT-4o's 230ms, which matters for real-time chat applications but is irrelevant for batch processing. For backend API usage, o4-mini is the better default.

Question 2

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

Accepted Answer

o4-mini is significantly better for coding: Coding Arena ELO 1380 vs GPT-4o's 1265, and HumanEval approximately 92% vs 90.2%. The gap is large enough to matter in practice -- o4-mini handles complex algorithmic problems and multi-step debugging more reliably. For data science Python with live execution in ChatGPT, GPT-4o's Code Interpreter has a workflow advantage, but on raw code generation quality, o4-mini wins clearly.

Question 3

Which is better for business writing, GPT-4o or o4-mini?

Accepted Answer

GPT-4o produces more natural-sounding prose slightly faster due to its lower TTFT, which makes it feel more fluid in interactive writing sessions. o4-mini can produce excellent business writing but its extended thinking overhead means it occasionally over-engineers simple writing tasks. For high-volume document generation or email drafting via API, o4-mini's cost savings outweigh the minor quality difference on non-reasoning writing tasks.

Question 4

How much cheaper is o4-mini compared to GPT-4o?

Accepted Answer

o4-mini costs $1.10/M input tokens and $4.40/M output tokens vs GPT-4o at $2.50/M input and $10.00/M output. That is a 56% saving on input and 56% saving on output -- roughly 2.3x cheaper overall. At 10M output tokens per month, o4-mini saves you $56,000 annually compared to GPT-4o. The savings compound quickly for high-volume production workloads.

Question 5

What is the context window of o4-mini vs GPT-4o?

Accepted Answer

o4-mini has a 200K token context window, roughly 150,000 words. GPT-4o's context window is 128K tokens (~96,000 words). For most tasks the difference is irrelevant, but o4-mini's larger context is useful for analyzing full codebases, long contracts, or ingesting multiple long documents in a single request.

Question 6

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

Accepted Answer

GPT-4o is faster: 95 tokens/second output speed and 230ms time-to-first-token, compared to o4-mini's 60 tokens/second and 1200ms TTFT. The latency gap is significant for real-time chat: o4-mini takes about 1 second before it starts responding, vs GPT-4o's near-instant reply. For batch processing, async jobs, or non-interactive workloads, this latency difference is irrelevant.

Question 7

Is o4-mini good for reasoning tasks?

Accepted Answer

o4-mini is excellent for reasoning -- it is a reasoning-native model that uses chain-of-thought thinking before responding, which is why it outperforms GPT-4o on complex tasks despite costing less. On MATH benchmark it scores approximately 93% vs GPT-4o's 76.6%, and on GPQA approximately 70% vs GPT-4o's 53%. For math, logic puzzles, scientific reasoning, and complex planning, o4-mini is clearly the better choice.

Question 8

When should I use GPT-4o over o4-mini?

Accepted Answer

Use GPT-4o when: (1) your application requires real-time low-latency responses (chatbots, autocomplete, voice interfaces); (2) you need native Code Interpreter in ChatGPT for live Python execution; (3) your task is a simple one-shot question where o4-mini's reasoning overhead adds unnecessary latency; or (4) you are already heavily invested in GPT-4o fine-tuned models and the migration cost exceeds the savings. In most other cases, o4-mini's quality and cost profile make it the better default.

Feature	GPT-4o	o4-mini
Provider	OpenAI	OpenAI
Input Price / 1M tokens	$2.50	$1.10
Output Price / 1M tokens	$10.00	$4.40
Context Window	128K	128K
Max Output Tokens	16,384	32,768
Arena ELO	1,260	1,260
Coding ELO	1,265	1,270
TTFT (ms)	230	180
Tokens/sec	95	105
Multimodal	Yes	No
JSON Mode	Yes	Yes
Function Calling	Yes	Yes
Vision	Yes	No

GPT-4o vs o4-mini: Pricing, Benchmarks & Verdict (2026)

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