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$3.00 /M
Output$15.00 /M
← ModelsKimi K3
Nemotron 3 Ultra 550B A55B (free)
Kimi K3 vs Nemotron 3 Ultra 550B A55B (free)
Compare Kimi K3 from Moonshot AI and Nemotron 3 Ultra 550B A55B (free) from Nvidia on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
Kimi K3Nemotron 3 Ultra 550B A55B (free)+ Add model · 2/4
Nemotron 3 Ultra 550B A55B (free)
Nvidia · text → text
NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model featuring an extensive 1,000,000-token context length. Built on a hybrid Transformer-Mamba mixture-of-experts (MoE) architecture, it operates with 55B active parameters out of a total of 550B parameters. This advanced structure is designed to support sophisticated reasoning and complex task orchestration.
Input$0.00 /M
Output$0.00 /M
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Kimi K3
Nemotron 3 Ultra 550B A55B (free)
Input /M
$3.00
$0.00
Output /M
$15.00
$0.00
Cache read /M
$0.30
$0.00
Context length
1,048,576
1,000,000
Max output
1,048,576
0
Time to First Token
0.9 s
-
Throughput
73.1 tok/s
-
Modalities
textimagevideo
text
Supported Parameters
thinkingfunction callingstructured outputs
reasoningtool callinglong context
API Formats
chat_completions
Released
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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.
kimi-k3nemotron-3-ultra-550b-a55b-free
Tokens / day
-
Requests / day
-
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
kimi-k3nemotron-3-ultra-550b-a55b-free
Throughput (tok/s)
-
TTFT (s)
-
Uptime (%)
-
Cost calculator
Estimate your monthly bill for the same workload on each model.
Nemotron 3 Ultra 550B A55B (free)
$0.00 /mo
Kimi K3
$405 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
How large is each context window?
Kimi K3 accepts 1,048,576 and Nemotron 3 Ultra 550B A55B (free) accepts 1,000,000 input tokens.
What inputs and capabilities does each model support?
Kimi K3 accepts text, image and video input and supports thinking, function calling and structured outputs; Nemotron 3 Ultra 550B A55B (free) accepts text input and supports reasoning, tool calling and long context.
Can I call Kimi K3 and Nemotron 3 Ultra 550B A55B (free) 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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