Seed 2.1 Turbo API pricing
Official ByteDance Seed list price, last checked Oct 29, 2026. Updated Oct 29, 2026.
Seed 2.1 Turbo costs $0.50 per 1M input tokens and $2.50 per 1M output tokens, cached input at $0.10, and a 256K-token context window, per ByteDance Seed's official pricing page (checked Oct 29, 2026). It's priced in the middle of the pack: number 30 of 77 by blended price ($1 per 1M tokens at a 3 to 1 input to output mix). LMArena doesn't list it on the boards we track, so we don't rank its quality. For less, look at Qwen3 Coder Flash ($0.60 blended).
Seed 2.1 Turbo price per million tokens
| Seed 2.1 Turbo price per million tokens | USD |
|---|---|
| Input | $0.50 |
| Cached input | $0.10 |
| Output | $2.50 |
| Blended, 3 parts input to 1 part output | $1 |
| Context window | 256K tokens |
Official note from ByteDance Seed: BytePlus ModelArk price. Prompts up to 256K.
What Seed 2.1 Turbo costs for real work
List-price estimates for a month, no discounts. Our math, not a quote: change the token counts in the plan vs API calculator.
| Workload | Tokens a month | Seed 2.1 Turbo | GLM-4.7 | Qwen3 Coder Flash |
|---|---|---|---|---|
| Light: a side project or personal assistant | 2M in, 0.5M out | $2.25 | $2.30 | $1.35 |
| Medium: a small team or one product feature | 20M in, 5M out | $22.50 | $23.00 | $13.50 |
| Heavy: a production app | 200M in, 50M out | $225 | $230 | $135 |
| Medium with 80% of input cached | 20M in (16M cached), 5M out | $16.10 | $15.16 | n/a |
How Seed 2.1 Turbo ranks on LMArena
It isn't on any LMArena board we track as of Oct 29, 2026. We don't estimate quality for unranked models. See the best model for each task for ranked options.
Closest rivals to Seed 2.1 Turbo
The models nearest in price, other makers first. Ranks are on LMArena, where we have them.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| GLM-4.7 | $0.60 / $2.20 | $1 | Same price, no score to separate them. Compare |
| GLM-4.6 | $0.60 / $2.20 | $1 | Same price, no score to separate them. Compare |
| Mistral Large 4 | $0.70 / $2.10 | $1.05 | Seed 2.1 Turbo wins on price. Compare |
| ERNIE 5.1 | $0.56 / $2.53 | $1.05 | Seed 2.1 Turbo wins on price. Compare |
Cheaper alternatives to Seed 2.1 Turbo
At least 40% cheaper blended, cheapest at the bottom of the list we found.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| Qwen3 Coder Flash | $0.30 / $1.50 | $0.60 | Qwen3 Coder Flash wins on price. Compare |
| GLM-5.3 FlashX | $0.37 / $1.25 | $0.59 | GLM-5.3 FlashX wins on price. Compare |
| Qwen3.6 Flash | $0.25 / $1.50 | $0.5625 | Qwen3.6 Flash wins on price. Compare |
More from ByteDance Seed
- Seed 2.0 Pro$0.50 in, $3 out per 1M
- Seed 2.0 Code Preview$0.50 in, $3 out per 1M
- Seed 2.0 Lite$0.25 in, $2 out per 1M
- Seed 2.0 Mini$0.10 in, $0.40 out per 1M
FAQ
How much does the Seed 2.1 Turbo API cost per million tokens?
$0.50 per 1M input tokens and $2.50 per 1M output tokens, plus $0.10 per 1M for cached input, as of Oct 29, 2026. A typical 3 to 1 input to output mix works out to $1 per 1M tokens.
Does Seed 2.1 Turbo charge more for long prompts?
ByteDance Seed doesn't list a long-prompt surcharge for Seed 2.1 Turbo. Its pricing note says: BytePlus ModelArk price. Prompts up to 256K.
Is Seed 2.1 Turbo cheaper than GLM-4.7?
Yes. A medium month (20M input and 5M output tokens) costs $22.50 on Seed 2.1 Turbo and $23.00 on GLM-4.7 at list price.
How does Seed 2.1 Turbo rank on LMArena?
It isn't listed on the LMArena boards we track, so we show no quality rank rather than guess.
What is a cheaper alternative to Seed 2.1 Turbo?
Qwen3 Coder Flash costs $0.30 in and $1.50 out per 1M tokens, about 1.7x less blended.
Where does this Seed 2.1 Turbo price come from?
From ByteDance Seed's official pricing page, which we check every day. This page was last checked Oct 29, 2026.