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#35

Seed 2.1 Turbo

Bytedance Seed Release: 2026-08-12 Tested on: 2026-10-01 04:03 bytedance-seed/seed-2-1-turbo::low
~200B total (~20B active)MoEClosedEstimated
(high) (medium) (low) (none)

Summary

Seed 2.1 Turbo scores 9.3 on AI BENCHY and ranks #35. It has 10.0 reliability, a 81.2% pass rate, $1.645 total cost, and 161.25s average response time.

What makes Seed 2.1 Turbo unique: It uses unusually many reasoning tokens, which can help explain its slower or more expensive runs.

Model facts

Researched on 2026-08-12

Estimated
Parameters
~200B total (~20B active)
Architecture
MoE
Availability
Closed
License
-

Best estimate from public evidence; the vendor did not disclose every value. The exact API checkpoint is closed and its architecture and parameter counts are not disclosed; estimate follows the Seed2 production tier.

Parameter source Availability source

Score

9.3

Consistency

9.3

Reliability

10.0

Total Cost (Current Price)

$1.645

Total Output Tokens

609,333

Total Input Tokens

241,855

Input Price

$0.500 / 1M

Output Price

$2.500 / 1M

Cache Read Price

N/A

Cache Write Price

N/A

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Tests Correct

Wrong Tests: 5

Attempt pass rate: 81.2%

Flaky tests

2

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

161.25s

Response Time (max): 739.98s

Response Time (total): 3708.70s

Wrong answer: 3 No answer: 2

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#35 Seed 2.1 Turbo

low
Cost
$0.049
Time
298.8s
Tokens
19,730 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-10-01 04:03 Re-test 9.3 10.0 $1.645 Current run
2026-08-12 22:35 Initial run 9.1 9.9 $1.631 Compare

This run used a different benchmark suite. Keep suite changes in mind when reading historical movement.

Run comparison

RunBenchmark coverageScoreConsistencyReliabilityTests CorrectFlaky testsTotal Output TokensTotal Input TokensTotal CostResponse Time (avg)
2026-10-01 04:03 · Current run69/69 attempts9.39.310.018/232609,333241,855$1.645161.25s
2026-08-12 22:35 · Initial run66/66 attempts9.18.99.917/223631,257104,483$1.631168.41s
Difference—+0.1+0.4+0.1+1-1-21924+137372+$0.014-7166ms

Benchmark coverage differs: 69/69 attempts (Target: 3 repeats per test) versus 66/66 attempts (Target: 3 repeats per test). Totals and repeat-sensitive metrics are not directly comparable.

These two runs used different benchmark suites, so the deltas reflect both model changes and suite changes.

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

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Category Breakdown

Category Score Consistency Tests Correct
Agentic 10.0 10.0
Anti-AI Tricks 8.2 7.9
Coding 10.0 10.0
Combined 10.0 10.0
Data parsing and extraction 10.0 10.0
Domain specific 2.9 7.2
General Intelligence 10.0 10.0
Instructions following 9.8 10.0
Puzzle Solving 10.0 10.0
Tool Calling 10.0 10.0
Trivia 3.0 10.0

Compared models