Models

GPT 4o vs GPT 4o (free)

Compare GPT 4o from OpenAI and GPT 4o (free) from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

OpenAIGPT 4oOpenAIGPT 4o (free)
OpenAI logo
GPT 4o
OpenAI · text, image → text

GPT-4o (“o” stands for “omni”) is a new-generation multimodal model designed for more natural human–computer interaction. It can accept any combination of text, audio, image, and video as input, and generate multimodal outputs including text, audio, and images. With audio response latency as low as 232 milliseconds on average around 320 milliseconds, it approaches real human conversational speed. The model delivers strong performance in English text and code, significantly improved multilingual understanding, and outstanding capabilities in visual and audio perception, while offering faster API performance and substantially reduced cost for real-time and complex multimodal applications.

Input$2.5 /M
Output$10 /M
Cache read$1.25 /M
OpenAI logo
GPT 4o (free)
OpenAI · text, image → text

This free model API comes from the OpenAI model deployed on Azure. To prevent abuse, the external content filter provided by Azure has been enforced, which will result in additional delays. If you want to experience the full version of the model API without filters, please use the paid version and request the model name ID without "-free".

Input$0 /M
Output$0 /M

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

GPT 4o
GPT 4o (free)
Input /M
$2.5
$0
Output /M
$10
$0
Cache read /M
$1.25
-
Context length
128,000
1,047,576
Max output
16,384
32,768
Time to First Token
0.6 s
0.5 s
Throughput
52.2 tok/s
72.3 tok/s
Modalities
textimage
textimage
Supported Parameters
toolsfunction callingstructured outputs
toolsfunction callingstructured outputslong context
API Formats
Released
-
-

Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

gpt-4ogpt-4o-free

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

gpt-4ogpt-4o-free

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
gpt-4ogpt-4o-free
128013201360
Overall
13351335
Coding
13601360
Math
13081309
Hard prompts
13271327
Instruction following
13181318
Multi-turn
13261327
Creative writing
13261326
Longer query
13381338
Chinese
13291330
English
13481348
Vision
gpt-4ogpt-4o-free
110011201140
Overall
11191119

Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.

Cost calculator

Estimate your monthly bill for the same workload on each model.

GPT 4o (free)
$0.00 /mo
GPT 4o
$300 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

How do their coding arena scores compare?

GPT 4o (free): 1360; GPT 4o: 1360 (LMArena coding leaderboard).

Which responds faster?

GPT 4o (free): 0.5s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

How large is each context window?

GPT 4o accepts 128,000 and GPT 4o (free) accepts 1,047,576 input tokens. Maximum output per request is 16,384 tokens on GPT 4o and 32,768 tokens on GPT 4o (free).

Which one generates tokens faster?

GPT 4o (free) at 72.3 tok/s and GPT 4o at 52.2 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

GPT 4o accepts text and image input and supports tool calling, function calling and structured outputs; GPT 4o (free) accepts text and image input and supports tool calling, function calling, structured outputs and long context.

Can I call GPT 4o and GPT 4o (free) with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

Popular comparisons

Related model match-ups readers also look at.