GPT 5 Mini
OpenAI · text, image → text
GPT-5 mini is a faster, more cost-efficient version of GPT-5. It's great for well-defined tasks and precise prompts.
Input$0.25 /M
Output$2 /M
Cache read$0.025 /M
← ModelsGPT 5 Mini
Grok 4.5
GPT 5 Mini vs Grok 4.5
Compare GPT 5 Mini from OpenAI and Grok 4.5 from Grok on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
GPT 5 MiniGrok 4.5+ Add model · 2/4
Grok 4.5
Grok · text, image → text
Grok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math. With both intelligent and efficient reasoning, Grok 4.5 excels at real engineering tasks and exceeds comparable leading models at these tasks.
Input$2 /M
Output$6 /M
Cache read$0.5 /M
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
GPT 5 Mini
Grok 4.5
Input /M
$0.25
$2
Output /M
$2
$6
Cache read /M
$0.025
$0.5
Context length
400,000
500,000
Max output
128,000
500,000
Time to First Token
4.6 s
3.5 s
Throughput
108.2 tok/s
26.6 tok/s
Modalities
textimage
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputs
thinkingtoolsfunction callingstructured outputslong context
API Formats
Released
-
July 2026
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-5-minigrok-4.5
Tokens / day
-
Requests / day
-
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
gpt-5-minigrok-4.5
Throughput (tok/s)
-
TTFT (s)
-
Uptime (%)
-
LMArena Benchmarks
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Text
gpt-5-minigrok-4.5
13001360142014801540
Overall
13901471
Coding
14301523
Math
14061479
Hard prompts
14031495
Instruction following
13741466
Multi-turn
13721476
Creative writing
13261451
Longer query
13701487
Chinese
14091512
English
13981476
Vision
gpt-5-minigrok-4.5
1160122012801340
Overall
11811282
OCR
11951294
Diagram
12121319
Homework
12311324
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 5 Mini
$45.00 /mo
Grok 4.5
$210 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: GPT 5 Mini, Grok 4.5?
GPT 5 Mini: $2/M output tokens; Grok 4.5: $6/M. Use the cost calculator above to estimate your own workload.
How do their coding arena scores compare?
Grok 4.5: 1523; GPT 5 Mini: 1430 (LMArena coding leaderboard).
Which responds faster?
Grok 4.5: 3.5s 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 5 Mini accepts 400,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 128,000 tokens on GPT 5 Mini and 500,000 tokens on Grok 4.5.
Which one generates tokens faster?
GPT 5 Mini at 108.2 tok/s and Grok 4.5 at 26.6 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 5 Mini accepts text and image input and supports thinking, tool calling, function calling and structured outputs; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.
Can I call GPT 5 Mini and Grok 4.5 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.
AIHubMix