GPT 5.4 Mini
OpenAI · text, image → text
GPT-5.4 mini is a faster, more efficient model that inherits the advantages of GPT-5.4 and is specifically optimized for high-volume workloads.
Input$0.75 /M
Output$4.50 /M
← ModelsGPT 5.4 Mini
Grok 4.5
GPT 5.4 Mini vs Grok 4.5
Output tokens cost $4.50 per million on GPT 5.4 Mini and $6.00 per million on Grok 4.5. Input tokens cost $0.75 per million on GPT 5.4 Mini and $2.00 per million on Grok 4.5. Cached input tokens are billed at $0.08 per million on GPT 5.4 Mini and $0.50 per million on Grok 4.5. Context lengths are 400,000 tokens on GPT 5.4 Mini and 500,000 tokens on Grok 4.5. Time to first token (TTFT) measured on AIHubMix is 2.4s on GPT 5.4 Mini and 1.7s on Grok 4.5. Measured output throughput is 99.1 tok/s on GPT 5.4 Mini and 25.3 tok/s on Grok 4.5. On the LMArena coding leaderboard GPT 5.4 Mini scores 1496 and Grok 4.5 scores 1523.
GPT 5.4 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$2.00 /M
Output$6.00 /M
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
GPT 5.4 Mini
Grok 4.5
Input /M
$0.75
$2.00
Output /M
$4.50
$6.00
Cache read /M
$0.08
$0.50
Context length
400,000
500,000
Max output
128,000
500,000
Time to First Token
2.4 s
1.7 s
Throughput
99.1 tok/s
25.3 tok/s
Modalities
textimage
textimage
Supported Parameters
toolsfunction callingstructured outputsweb
thinkingtoolsfunction callingstructured outputslong context
API Formats
chat_completions · responses · claude_api
Released
March 17, 2026
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-5.4-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-5.4-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-5.4-minigrok-4.5
13801420146015001540
Overall
14481470
Coding
14961523
Math
14401478
Hard prompts
14701495
Instruction following
14351466
Multi-turn
14691477
Creative writing
14041449
Longer query
14481485
Chinese
14781511
English
14511475
Vision
gpt-5.4-minigrok-4.5
1220126013001340
Overall
12521282
OCR
12631295
Diagram
12831321
Homework
12931328
WebDev Arena
gpt-5.4-minigrok-4.5
1360144015201600
Overall
13971556
React
13871559
HTML
14231577
Gaming
14211586
Simulations
14081598
Data analytics
13891522
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 5.4 Mini
$113 /mo
Grok 4.5
$210 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: GPT 5.4 Mini, Grok 4.5?
GPT 5.4 Mini: $4.50/M output tokens; Grok 4.5: $6.00/M. Use the cost calculator above to estimate your own workload.
How do their coding arena scores compare?
Grok 4.5: 1523; GPT 5.4 Mini: 1496 (LMArena coding leaderboard).
Which responds faster?
Grok 4.5: 1.7s 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 5.4 Mini accepts 400,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 128,000 tokens on GPT 5.4 Mini and 500,000 tokens on Grok 4.5.
Which one generates tokens faster?
GPT 5.4 Mini at 99.1 tok/s and Grok 4.5 at 25.3 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 5.4 Mini accepts text and image input and supports tool calling, function calling, structured outputs and web search; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.
Can I call GPT 5.4 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.
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