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
Kimi K3
GPT 5 Mini vs Kimi K3
Compare GPT 5 Mini from OpenAI and Kimi K3 from Moonshot AI 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 MiniKimi K3+ Add model · 2/4
10% off
Kimi K3
Moonshot AI · text, image, video → text
Kimi K3 is Kimi’s flagship model for long-horizon coding and end-to-end knowledge work, with a 1M-token context window and industry-leading intelligence.
Input$3$2.7 /M
Output$15$13.5 /M
Cache read$0.3$0.27 /M
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
GPT 5 Mini
Kimi K3
Input /M
$0.25
$3$2.7−10%
Output /M
$2
$15$13.5−10%
Cache read /M
$0.025
$0.3$0.27−10%
Context length
400,000
1,048,576
Max output
128,000
1,048,576
Time to First Token
4.1 s
0.9 s
Throughput
93.7 tok/s
73.1 tok/s
Modalities
textimage
textimagevideo
Supported Parameters
thinkingtoolsfunction callingstructured outputs
thinkingfunction callingstructured outputs
API Formats
Released
-
-
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-minikimi-k3
Tokens / day
-
Requests / day
-
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
gpt-5-minikimi-k3
Throughput (tok/s)
-
TTFT (s)
-
Uptime (%)
-
LMArena Benchmarks
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Text
gpt-5-minikimi-k3
1300138014601540
Overall
13901486
Coding
14301531
Math
14061406
Hard prompts
14031505
Instruction following
13741479
Multi-turn
13721499
Creative writing
13261470
Longer query
13701502
Chinese
14091527
English
13981491
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
Kimi K3
$405$365 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: GPT 5 Mini, Kimi K3?
GPT 5 Mini: $2/M output tokens; Kimi K3: $13.5/M. Use the cost calculator above to estimate your own workload.
How do their coding arena scores compare?
Kimi K3: 1531; GPT 5 Mini: 1430 (LMArena coding leaderboard).
Which responds faster?
Kimi K3: 0.9s 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 Kimi K3 accepts 1,048,576 input tokens. Maximum output per request is 128,000 tokens on GPT 5 Mini and 1,048,576 tokens on Kimi K3.
Which one generates tokens faster?
GPT 5 Mini at 93.7 tok/s and Kimi K3 at 73.1 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; Kimi K3 accepts text, image and video input and supports thinking, function calling and structured outputs.
Can I call GPT 5 Mini and Kimi K3 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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