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GPT 5.4 High vs Grok 4.5

Output tokens cost $15.00 per million on GPT 5.4 High and $6.00 per million on Grok 4.5. Input tokens cost $2.50 per million on GPT 5.4 High and $2.00 per million on Grok 4.5. Cached input tokens are billed at $0.25 per million on GPT 5.4 High and $0.50 per million on Grok 4.5. Context lengths are 400,000 tokens on GPT 5.4 High and 500,000 tokens on Grok 4.5. On the LMArena coding leaderboard GPT 5.4 High scores 1520 and Grok 4.5 scores 1523.

OpenAIGPT 5.4 HighGrokGrok 4.5
+ Add model · 2/4
OpenAI logo
GPT 5.4 High
OpenAI · text, image → text

GPT-5.4 supports configurable reasoning effort only through the /responses endpoint. To make higher-intensity reasoning available directly via the /chat interface, GPT-5.4-High is provided as a reasoning-enhanced variant of GPT-5.4 with reasoning_effort preset to high. It is designed for tasks that require deeper analysis, stronger result consistency, and greater controllability. By applying more aggressive reasoning strategies and more effective use of extended context, the model delivers clearer and more reliable responses, making it well suited for complex agent workflows, long-chain decision-making, and reliability-critical advanced applications.

Input$2.50 /M
Output$15.00 /M
Details
Grok logo
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
Details

Pricing & Specifications

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

GPT 5.4 High
Grok 4.5
Input /M
$2.50
$2.00
Output /M
$15.00
$6.00
Cache read /M
$0.25
$0.50
Context length
400,000
500,000
Max output
128,000
500,000
Time to First Token
-
2.0 s
Throughput
-
26.5 tok/s
Modalities
textimage
textimage
Supported Parameters
thinkingfunction callingwebstructured outputstools
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-5.4-highgrok-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-highgrok-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-highgrok-4.5
1420146015001540
Overall
14701476
Coding
15201523
Math
14781494
Hard prompts
14951498
Instruction following
14661473
Multi-turn
14771494
Creative writing
14441449
Longer query
14841485
Chinese
15061511
English
14751478
Vision
gpt-5.4-highgrok-4.5
126013001340
Overall
12801282
OCR
12951295
Diagram
13171321
Homework
13281329

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.

Grok 4.5
$210 /mo
GPT 5.4 High
$375 /mo

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

FAQ

Which is cheaper: GPT 5.4 High, Grok 4.5?

Grok 4.5: $6.00/M output tokens; GPT 5.4 High: $15.00/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 High: 1520 (LMArena coding leaderboard).

How large is each context window?

GPT 5.4 High accepts 400,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 128,000 tokens on GPT 5.4 High and 500,000 tokens on Grok 4.5.

What inputs and capabilities does each model support?

GPT 5.4 High accepts text and image input and supports thinking, function calling, web search, structured outputs and tool calling; 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 High 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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