As of August 30, 2026, Seed 2.1 Pro is 64% cheaper per million tokens than o1-mini. o1-mini is $3.00 / $12.00 per million input/output tokens versus Seed 2.1 Pro at $0.89 / $4.45. Sources: https://developers.openai.com/api/docs/pricing and https://www.volcengine.com/product/doubao
Sources: OpenAI API pricing (https://developers.openai.com/api/docs/pricing); ByteDance pricing (https://www.volcengine.com/product/doubao)
o1-mini
OpenAI
Input
$3.00
Output
$12.00
Seed 2.1 Pro
ByteDance
Input
$0.89
Output
$4.45
Token pricing, specs, and benchmarks side by side
o1-miniSeed 2.1 ProVerdict
Both models are closely matched on benchmarks. Seed 2.1 Pro has the pricing advantage, making it the better value unless o1-mini's specific capabilities are critical to your workflow.
As of August 30, 2026, Seed 2.1 Pro is 64% cheaper on blended LLM API pricing. Seed 2.1 Pro costs $0.89 per million input tokens and $4.45 per million output tokens ($5.34 blended 1M-in + 1M-out). o1-mini costs $3.00 / $12.00 per million tokens ($15.00 blended). Sources: https://developers.openai.com/api/docs/pricing and https://www.volcengine.com/product/doubao. The cheapest LLM for your app still depends on how many output tokens you generate.
o1-mini OpenAI API pricing is $3.00 input and $12.00 output per million tokens via OpenAI. Seed 2.1 Pro ByteDance API pricing is $0.89 input and $4.45 output per million tokens via ByteDance. Use those four numbers, not ChatGPT Plus or Claude Pro subscription prices, when you are comparing APIs.
Seed 2.1 Pro has a published SWE-bench Pro score of 57.5%. o1-mini does not have that eval on this page yet.
o1-mini supports a 128K token context window, while Seed 2.1 Pro supports 262K tokens. Seed 2.1 Pro offers a larger context window. Filling a larger window bills more input tokens, so the cheaper-per-million model can still cost more on long documents.
Shared benchmark scores for o1-mini and Seed 2.1 Pro are still limited. Check the comparison table for the evals each model has published. Check the comparison table for GPQA Diamond, SWE-bench, MMLU, HLE, and the other evals we track. Token price and benchmark score together are the usual LLM comparison, not either number alone.
Both o1-mini and Seed 2.1 Pro are production API models. For cost-sensitive production traffic, Seed 2.1 Pro has better economics on the blended 1M-in + 1M-out scale. For maximum capability, weight the benchmark table for your domain. Many production stacks route cheap models for drafts and a frontier model for the hard turn, which is usually cheaper than sending everything to the expensive API.
Yes. Call o1-mini through OpenAI and Seed 2.1 Pro through ByteDance with separate API keys, or through a gateway that already wraps both. Keep prompts in tokens, not characters, when you estimate the invoice. AnotherWrapper templates can swap providers without rewriting auth and billing.
List rates are the latest published OpenAI API pricing and ByteDance API pricing, quoted per million tokens. Official rate sheets: https://developers.openai.com/api/docs/pricing and https://www.volcengine.com/product/doubao. Prompt caching, batch APIs, and committed-use discounts can change the invoice. Benchmark scores are from official publications and independent evals, updated as new numbers land.
o1-mini supports up to 66K output tokens per request, while Seed 2.1 Pro supports up to an unspecified number of output tokens. Output tokens are usually the expensive half of API pricing, so a higher max output cap is a capability, not a discount.
o1-mini has a measured throughput of approximately 115 tokens/second. Throughput data for Seed 2.1 Pro is not yet available. Throughput (tokens per second) and time-to-first-token are why two models with the same per-million-token price can still feel different in chat and agents.
Use the model pickers at the top of this LLM comparison. Search any model in the index and the URL updates. Open o1-mini or Seed 2.1 Pro from the sidebar for the single-model API pricing page, or go back to the LLM pricing table to sort by cheapest blended cost.
This comparison covers API pricing, context window, throughput, and benchmark scores. o1-mini costs $3.00/M input and $12.00/M output. Seed 2.1 Pro costs $0.89/M input and $4.45/M output.
Rank both on the LLM leaderboard, SWE-bench, and Humanity's Last Exam.
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