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Doubao Seed 2.0 Pro vs Kimi K3

Output tokens cost $2.41 per million on Doubao Seed 2.0 Pro and $15.00 per million on Kimi K3. Input tokens cost $0.48 per million on Doubao Seed 2.0 Pro and $3.00 per million on Kimi K3. Cached input tokens are billed at $0.10 per million on Doubao Seed 2.0 Pro and $0.30 per million on Kimi K3. Context lengths are 256,000 tokens on Doubao Seed 2.0 Pro and 1,048,576 tokens on Kimi K3. Time to first token (TTFT) measured on AIHubMix is 5.2s on Doubao Seed 2.0 Pro and 0.9s on Kimi K3. Measured output throughput is 33.5 tok/s on Doubao Seed 2.0 Pro and 73.1 tok/s on Kimi K3. On the LMArena coding leaderboard Doubao Seed 2.0 Pro scores 1511 and Kimi K3 scores 1531.

ByteDanceDoubao Seed 2.0 ProMoonshot AIKimi K3
+ Add model · 2/4
ByteDance logo
Doubao Seed 2.0 Pro
ByteDance · text, image, video → text

Doubao flagship all-purpose general model, targeting complex reasoning and long-chain task execution scenarios in the Agent era. It emphasizes multimodal understanding, long-context reasoning, structured generation, and tool-augmented execution. It excels at handling complex instructions and multi-constraint execution, reliably addressing multi-step complex planning, intricate image-text reasoning, video content understanding, and high-difficulty analysis scenarios.

Input$0.48 /M
Output$2.41 /M
Details
Moonshot AI logo
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
Details

Pricing & Specifications

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

Doubao Seed 2.0 Pro
Kimi K3
Input /M
$0.48
$3.00
Output /M
$2.41
$15.00
Cache read /M
$0.10
$0.30
Context length
256,000
1,048,576
Max output
128,000
1,048,576
Time to First Token
5.2 s
0.9 s
Throughput
33.5 tok/s
73.1 tok/s
Modalities
textimagevideo
textimagevideo
Supported Parameters
thinkingwebtoolsfunction 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.

doubao-seed-2-0-prokimi-k3

Tokens / day

-

Requests / day

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Performance Past 3 Days

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

doubao-seed-2-0-prokimi-k3

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

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LMArena Benchmarks

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

Text
doubao-seed-2-0-prokimi-k3
1380144015001560
Overall
14551486
Coding
15111531
Math
14501450
Hard prompts
14791505
Instruction following
14341479
Multi-turn
14451499
Creative writing
14031470
Longer query
14521502
Chinese
15021527
English
14621491

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.

Doubao Seed 2.0 Pro
$65.10 /mo
Kimi K3
$405 /mo

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

FAQ

Which is cheaper: Doubao Seed 2.0 Pro, Kimi K3?

Doubao Seed 2.0 Pro: $2.41/M output tokens; Kimi K3: $15.00/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Kimi K3: 1531; Doubao Seed 2.0 Pro: 1511 (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?

Doubao Seed 2.0 Pro accepts 256,000 and Kimi K3 accepts 1,048,576 input tokens. Maximum output per request is 128,000 tokens on Doubao Seed 2.0 Pro and 1,048,576 tokens on Kimi K3.

Which one generates tokens faster?

Kimi K3 at 73.1 tok/s and Doubao Seed 2.0 Pro at 33.5 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

Doubao Seed 2.0 Pro accepts text, image and video input and supports thinking, web search, 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 Doubao Seed 2.0 Pro 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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