Output tokens cost $0.27 per million on Doubao Seed 1.8 and $15.00 per million on Kimi K3. Input tokens cost $0.11 per million on Doubao Seed 1.8 and $3.00 per million on Kimi K3. Cached input tokens are billed at $0.02 per million on Doubao Seed 1.8 and $0.30 per million on Kimi K3. Context lengths are 256,000 tokens on Doubao Seed 1.8 and 1,048,576 tokens on Kimi K3. Time to first token (TTFT) measured on AIHubMix is 1.7s on Doubao Seed 1.8 and 0.9s on Kimi K3. Measured output throughput is 26.6 tok/s on Doubao Seed 1.8 and 73.1 tok/s on Kimi K3.
Doubao Seed 1.8
Kimi K3Doubao's strongest multimodal Agent model Seed1.8 has powerful multimodal capabilities, supports image and text input, and can efficiently and accurately complete tasks in scenarios such as information retrieval, code generation, GUI interaction, and complex workflows, meeting increasingly diverse technical demands.
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.
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Daily traffic served through AIHubMix — how demand for each model is trending.
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
Doubao Seed 1.8: $0.27/M output tokens; Kimi K3: $15.00/M. Use the cost calculator above to estimate your own workload.
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.
Doubao Seed 1.8 accepts 256,000 and Kimi K3 accepts 1,048,576 input tokens. Maximum output per request is 64,000 tokens on Doubao Seed 1.8 and 1,048,576 tokens on Kimi K3.
Kimi K3 at 73.1 tok/s and Doubao Seed 1.8 at 26.6 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Doubao Seed 1.8 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.
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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