Output tokens cost $4.65 per million on Doubao Seed 2.1 Pro and $6.00 per million on Grok 4.5. Input tokens cost $0.93 per million on Doubao Seed 2.1 Pro and $2.00 per million on Grok 4.5. Cached input tokens are billed at $0.19 per million on Doubao Seed 2.1 Pro and $0.50 per million on Grok 4.5. Context lengths are 256,000 tokens on Doubao Seed 2.1 Pro and 500,000 tokens on Grok 4.5. Time to first token (TTFT) measured on AIHubMix is 4.6s on Doubao Seed 2.1 Pro and 1.9s on Grok 4.5. Measured output throughput is 30.1 tok/s on Doubao Seed 2.1 Pro and 26.8 tok/s on Grok 4.5.
Doubao Seed 2.1 Pro
Grok 4.5A new generation of large models moving toward production-grade intelligence, comprehensively upgrading coding, agent, and multimodal capabilities with stronger autonomous planning, long-horizon execution, and dynamic recovery abilities to handle real, complex enterprise tasks.
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.
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 2.1 Pro: $4.65/M output tokens; Grok 4.5: $6.00/M. Use the cost calculator above to estimate your own workload.
Grok 4.5: 1.9s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Doubao Seed 2.1 Pro accepts 256,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 256,000 tokens on Doubao Seed 2.1 Pro and 500,000 tokens on Grok 4.5.
Doubao Seed 2.1 Pro at 30.1 tok/s and Grok 4.5 at 26.8 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Doubao Seed 2.1 Pro accepts text, image and video input and supports thinking, web search, tool calling, function calling and structured outputs; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.
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.
Related model match-ups readers also look at.
AIHubMix