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Gemini 2.5 Flash Search vs Grok 4.5

Output tokens cost $2.50 per million on Gemini 2.5 Flash Search and $6.00 per million on Grok 4.5. Input tokens cost $0.30 per million on Gemini 2.5 Flash Search and $2.00 per million on Grok 4.5. Cached input tokens are billed at $0.03 per million on Gemini 2.5 Flash Search and $0.50 per million on Grok 4.5. Context lengths are 1,048,576 tokens on Gemini 2.5 Flash Search and 500,000 tokens on Grok 4.5. Time to first token (TTFT) measured on AIHubMix is 0.7s on Gemini 2.5 Flash Search and 2.2s on Grok 4.5. Measured output throughput is 54.6 tok/s on Gemini 2.5 Flash Search and 27.0 tok/s on Grok 4.5. On the LMArena coding leaderboard Gemini 2.5 Flash Search scores 1424 and Grok 4.5 scores 1523.

GoogleGemini 2.5 Flash SearchGrokGrok 4.5
+ Add model · 2/4
Google logo
Gemini 2.5 Flash Search
Google · text, image, audio, video → text

gemini-2.5-flash-search integrates Google's official search functionality; the search feature will have an additional separate fee log directly incorporated into the scoring, with detailed logs not displayed; this will be fixed and displayed later; only supports OpenAI-compatible formats for invocation, does not support Gemini SDK; for Gemini's native SDK, please set parameters directly using the official search parameters.

Input$0.30 /M
Output$2.50 /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.

Gemini 2.5 Flash Search
Grok 4.5
Input /M
$0.30
$2.00
Output /M
$2.50
$6.00
Cache read /M
$0.03
$0.50
Context length
1,048,576
500,000
Max output
65,536
500,000
Time to First Token
0.7 s
2.2 s
Throughput
54.6 tok/s
27.0 tok/s
Modalities
textimageaudiovideo
textimage
Supported Parameters
webtoolsfunction callingstructured outputslong context
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.

gemini-2.5-flash-searchgrok-4.5

Tokens / day

-

Requests / day

-

Performance Past 3 Days

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

gemini-2.5-flash-searchgrok-4.5

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

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

Text
gemini-2.5-flash-searchgrok-4.5
13801420146015001540
Overall
14101470
Coding
14241523
Math
14061478
Hard prompts
14201495
Instruction following
14011466
Multi-turn
14041477
Creative writing
13971449
Longer query
14191485
Chinese
14441511
English
14121475
Vision
gemini-2.5-flash-searchgrok-4.5
1180124013001360
Overall
12141282
OCR
12221295
Diagram
12341321
Homework
12381328

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.

Gemini 2.5 Flash Search
$55.49 /mo
Grok 4.5
$210 /mo

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

FAQ

Which is cheaper: Gemini 2.5 Flash Search, Grok 4.5?

Gemini 2.5 Flash Search: $2.50/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; Gemini 2.5 Flash Search: 1424 (LMArena coding leaderboard).

Which responds faster?

Gemini 2.5 Flash Search: 0.7s 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?

Gemini 2.5 Flash Search accepts 1,048,576 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 65,536 tokens on Gemini 2.5 Flash Search and 500,000 tokens on Grok 4.5.

Which one generates tokens faster?

Gemini 2.5 Flash Search at 54.6 tok/s and Grok 4.5 at 27.0 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

Gemini 2.5 Flash Search accepts text, image, audio and video input and supports web search, tool calling, function calling, structured outputs and long context; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.

Can I call Gemini 2.5 Flash Search 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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