Grok 3 Mini Fast Beta
Grok · → text
Input$0.33 /M
Output$2.2001 /M
← ModelsGrok 3 Mini Fast BetaGrok 4.5
Grok 3 Mini Fast Beta vs Grok 4.5
Compare Grok 3 Mini Fast Beta from Grok 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.
Grok 3 Mini Fast BetaGrok 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.
Grok 3 Mini Fast Beta
Grok 4.5
Input /M
$0.33
$2
Output /M
$2.2001
$6
Cache read /M
-
$0.5
Context length
0
500,000
Max output
0
500,000
Time to First Token
-
4.4 s
Throughput
-
34.2 tok/s
Modalities
textimage
Supported Parameters
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.
grok-3-mini-fast-betagrok-4.5
Tokens / day
-
Requests / day
-
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
grok-3-mini-fast-betagrok-4.5
Throughput (tok/s)
-
TTFT (s)
-
Uptime (%)
-
LMArena Benchmarks
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Text
grok-3-mini-fast-betagrok-4.5
13001360142014801540
Overall
13621471
Coding
13901523
Math
13881479
Hard prompts
13771495
Instruction following
13621466
Multi-turn
13481476
Creative writing
13291451
Longer query
13781487
Chinese
13841512
English
13741476
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 3 Mini Fast Beta
$52.80 /mo
Grok 4.5
$210 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: Grok 3 Mini Fast Beta, Grok 4.5?
Grok 3 Mini Fast Beta: $2.2001/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; Grok 3 Mini Fast Beta: 1390 (LMArena coding leaderboard).
Can I call Grok 3 Mini Fast Beta 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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